1 Release Notes {#RELEASE_NOTES}
4 \brief Release notes file for the netcdf-c package.
6 This file contains a high-level description of this package's evolution. Releases are in reverse chronological order (most recent first). Note that, as of netcdf 4.2, the `netcdf-c++` and `netcdf-fortran` libraries have been separated into their own libraries.
8 ## 4.6.3 - February 28, 2019
10 * [Bug Fix] Correctly generated `netcdf.pc` generated either by `configure` or `cmake`. If linking against a static netcdf, you would need to pass the `--static` argument to `pkg-config` in order to list all of the downstream dependencies. See [Github #1324](https://github.com/Unidata/netcdf-c/issues/1324) for more information.
11 * Now always write hidden coordinates attribute, which allows faster file opens when present. See [Github #1262](https://github.com/Unidata/netcdf-c/issues/1262) for more information.
12 * Some fixes for rename, including fix for renumbering of varids after a rename (#1307), renaming var to dim without coordinate var. See [Github #1297](https://github.com/Unidata/netcdf-c/issues/1297).
13 * Fix of NULL parameter causing segfaults in put_vars functions. See [Github #1265](https://github.com/Unidata/netcdf-c/issues/1265) for more information.
14 * Fix of --enable-benchmark benchmark tests [Github #1211](https://github.com/Unidata/netcdf-c/issues/1211)
15 * Update the license from the home-brewed NetCDF license to the standard 3-Clause BSD License. This change does not result in any new restrictions; it is merely the adoption of a standard, well-known and well-understood license in place of the historic NetCDF license written at Unidata. This is part of a broader push by Unidata to adopt modern, standardized licensing.
16 * [BugFix] Corrected DAP-releated issues on big-endian machines. See [Github #1321](https://github.com/Unidata/netcdf-c/issues/1321), [Github #1302](https://github.com/Unidata/netcdf-c/issues/1302) for more information.
17 * [BugFix][Enhancement] Various and sundry bugfixes and performance enhancements, thanks to \@edhartnett, \@gsjaardema, \@t-b, \@wkliao, and all of our other contributors.
18 * [Enhancement] Extended `nccopy -F` syntax to support multiple variables with a single invocation. See [Github #1311](https://github.com/Unidata/netcdf-c/issues/1311) for more information.
19 * [BugFix] Corrected an issue where DAP2 was incorrectly converting signed bytes, resulting in an erroneous error message under some circumstances. See [GitHub #1317](https://github.com/Unidata/netcdf-c/issues/1317) for more information. See [Github #1319](https://github.com/Unidata/netcdf-c/issues/1319) for related information.
20 * [BugFix][Enhancement] Modified `nccopy` so that `_NCProperties` is not copied over verbatim but is instead generated based on the version of `libnetcdf` used when copying the file. Additionally, `_NCProperties` are displayed if/when associated with a netcdf3 file, now. See [GitHub #803](https://github.com/Unidata/netcdf-c/issues/803) for more information.
22 ## 4.6.2 - November 16, 2018
24 * [Enhancement] Lazy att read - only read atts when user requests one of them. See [GitHub #857](https://github.com/Unidata/netcdf-c/issues/857).
25 * [Enhancement] Fast global att read - when global atts are read, they are read much more quickly. See [GitHub #857](https://github.com/Unidata/netcdf-c/issues/857).
27 ## 4.6.2-rc2 November 1, 2018
30 * [Enhancement] Add nccopy command options for per-variable chunk sizing, and minimum chunk size. See [GitHub #1087](https://github.com/Unidata/netcdf-c/pull/1087).
31 * [Bug Fix] Fix nccopy handling of user specified chunk sizes. See [GitHub #725](https://github.com/Unidata/netcdf-c/issues/725),[#1087](https://github.com/Unidata/netcdf-c/issues/1087).
32 * [Bug Fix] Avoid limit on number of times a netCDF4 attribute can be updated. Not a complete fix for the HDF5 "maximum creation order" problem, but should greatly reduce occurrences in many real-world cases. See [GitHub #350](https://github.com/Unidata/netcdf-c/issues/350).
33 * [Bug Fix] The use of NC_DISKLESS has been modified to make it cleaner. This adds a new flag called NC_PERSIST that takes over the now obsolete NC_MPIPOSIX.
34 * [Obsolete] Obsolete the MPIPOSIX flag.
35 * [Bug Fix] When using filters with HDF5 1.10.x or later, it is necessary to utilize the HDF5 replacements for malloc, realloc, and free in the filter code.
37 ## 4.6.2-rc1 - September 19, 2018
39 * [Enhancement] Create a new version of _NCProperties provenance attribute. This version (version 2) supports arbitrary key-value pairs. It is the default when new files are created. Version 1 continues to be accepted.
40 * [Enhancement] Allow user to set http read buffersize for DAP2 and DAP4 using the tag HTTP.READ.BUFFERSIZE in the .daprc file.
41 * [Enhancement] Allow user to set http keepalive for DAP2 and DAP4 using the tag HTTP.KEEPALIVE in the .daprc file (see the OPeNDAP documentation for details).
42 * [Enhancement] Support DAP4 remote tests using a new remote test server locatedon the Unidata JetStream project.
43 * [Enhancement] Improved the performance of the nc_get/put_vars operations by using the equivalent slab capabilities of hdf5. Result is a significant speedup of these operations. See [GitHub #1001](https://github.com/Unidata/netcdf-c/pull/1001) for more information.
44 * [Enhancement] Expanded the capabilities of `NC_INMEMORY` to support writing and accessing the final modified memory. See [GitHub #879](https://github.com/Unidata/netcdf-c/pull/879) for more information.
45 * [Enhancement] Made CDF5 support enabled by default. See [Github #931](https://github.com/Unidata/netcdf-c/issues/931) for more information.
46 * [Bug Fix] Corrected a number of memory issues identified in `ncgen`. See [GitHub #558 for more information](https://github.com/Unidata/netcdf-c/pull/558).
48 ## 4.6.1 - March 19, 2018
50 * [Bug Fix] Corrected an issue which could result in a dap4 failure. See [Github #888](https://github.com/Unidata/netcdf-c/pull/888) for more information.
51 * [Bug Fix][Enhancement] Allow `nccopy` to control output filter suppresion. See [Github #894](https://github.com/Unidata/netcdf-c/pull/894) for more information.
52 * [Enhancement] Reverted some new behaviors that, while in line with the netCDF specification, broke existing workflows. See [Github #843](https://github.com/Unidata/netcdf-c/issues/843) for more information.
53 * [Bug Fix] Improved support for CRT builds with Visual Studio, improves zlib detection in hdf5 library. See [Github #853](https://github.com/Unidata/netcdf-c/pull/853) for more information.
54 * [Enhancement][Internal] Moved HDF4 into a distinct dispatch layer. See [Github #849](https://github.com/Unidata/netcdf-c/pull/849) for more information.
56 ## 4.6.0 - January 24, 2018
57 * [Enhancement] Full support for using HDF5 dynamic filters, both for reading and writing. See the file docs/filters.md.
58 * [Enhancement] Added an option to enable strict null-byte padding for headers; this padding was specified in the spec but was not enforced. Enabling this option will allow you to check your files, as it will return an E_NULLPAD error. It is possible for these files to have been written by older versions of libnetcdf. There is no effective problem caused by this lack of null padding, so enabling these options is informational only. The options for `configure` and `cmake` are `--enable-strict-null-byte-header-padding` and `-DENABLE_STRICT_NULL_BYTE_HEADER_PADDING`, respectively. See [Github #657](https://github.com/Unidata/netcdf-c/issues/657) for more information.
59 * [Enhancement] Reverted behavior/handling of out-of-range attribute values to pre-4.5.0 default. See [Github #512](https://github.com/Unidata/netcdf-c/issues/512) for more information.
60 * [Bug] Fixed error in tst_parallel2.c. See [Github #545](https://github.com/Unidata/netcdf-c/issues/545) for more information.
61 * [Bug] Fixed handling of corrupt files + proper offset handling for hdf5 files. See [Github #552](https://github.com/Unidata/netcdf-c/issues/552) for more information.
62 * [Bug] Corrected a memory overflow in `tst_h_dimscales`, see [Github #511](https://github.com/Unidata/netcdf-c/issues/511), [Github #505](https://github.com/Unidata/netcdf-c/issues/505), [Github #363](https://github.com/Unidata/netcdf-c/issues/363) and [Github #244](https://github.com/Unidata/netcdf-c/issues/244) for more information.
64 ## 4.5.0 - October 20, 2017
66 * Corrected an issue which could potential result in a hang while using parallel file I/O. See [Github #449](https://github.com/Unidata/netcdf-c/pull/449) for more information.
67 * Addressed an issue with `ncdump` not properly handling dates on a 366 day calendar. See [GitHub #359](https://github.com/Unidata/netcdf-c/issues/359) for more information.
69 ### 4.5.0-rc3 - September 29, 2017
71 * [Update] Due to ongoing issues, native CDF5 support has been disabled by **default**. You can use the options mentioned below (`--enable-cdf5` or `-DENABLE_CDF5=TRUE` for `configure` or `cmake`, respectively). Just be aware that for the time being, Reading/Writing CDF5 files on 32-bit platforms may result in unexpected behavior when using extremely large variables. For 32-bit platforms it is best to continue using `NC_FORMAT_64BIT_OFFSET`.
72 * [Bug] Corrected an issue where older versions of curl might fail. See [GitHub #487](https://github.com/Unidata/netcdf-c/issues/487) for more information.
73 * [Enhancement] Added options to enable/disable `CDF5` support at configure time for autotools and cmake-based builds. The options are `--enable/disable-cdf5` and `ENABLE_CDF5`, respectively. See [Github #484](https://github.com/Unidata/netcdf-c/issues/484) for more information.
74 * [Bug Fix] Corrected an issue when subsetting a netcdf3 file via `nccopy -v/-V`. See [Github #425](https://github.com/Unidata/netcdf-c/issues/425) and [Github #463](https://github.com/Unidata/netcdf-c/issues/463) for more information.
75 * [Bug Fix] Corrected `--has-dap` and `--has-dap4` output for cmake-based builds. See [GitHub #473](https://github.com/Unidata/netcdf-c/pull/473) for more information.
76 * [Bug Fix] Corrected an issue where `NC_64BIT_DATA` files were being read incorrectly by ncdump, despite the data having been written correctly. See [GitHub #457](https://github.com/Unidata/netcdf-c/issues/457) for more information.
77 * [Bug Fix] Corrected a potential stack buffer overflow. See [GitHub #450](https://github.com/Unidata/netcdf-c/pull/450) for more information.
79 ### 4.5.0-rc2 - August 7, 2017
81 * [Bug Fix] Addressed an issue with how cmake was implementing large file support on 32-bit systems. See [GitHub #385](https://github.com/Unidata/netcdf-c/issues/385) for more information.
82 * [Bug Fix] Addressed an issue where ncgen would not respect keyword case. See [GitHub #310](https://github.com/Unidata/netcdf-c/issues/310) for more information.
84 ### 4.5.0-rc1 - June 5, 2017
86 * [Enhancement] DAP4 is now included. Since dap2 is the default for urls, dap4 must be specified by
87 (1) using "dap4:" as the url protocol, or
88 (2) appending "#protocol=dap4" to the end of the url, or
89 (3) appending "#dap4" to the end of the url
90 Note that dap4 is enabled by default but remote-testing is
91 disbled until the testserver situation is resolved.
92 * [Enhancement] The remote testing server can now be specified with the `--with-testserver` option to ./configure.
93 * [Enhancement] Modified netCDF4 to use ASCII for NC_CHAR. See [Github Pull request #316](https://github.com/Unidata/netcdf-c/pull/316) for more information.
94 * [Bug Fix] Corrected an error with how dimsizes might be read. See [Github #410](https://github.com/unidata/netcdf-c/issues/410) for more information.
95 * [Bug Fix] Corrected an issue where 'make check' would fail if 'make' or 'make all' had not run first. See [Github #339](https://github.com/Unidata/netcdf-c/issues/339) for more information.
96 * [Bug Fix] Corrected an issue on Windows with Large file tests. See [Github #385](https://github.com/Unidata/netcdf-c/issues/385]) for more information.
97 * [Bug Fix] Corrected an issue with diskless file access, see [Pull Request #400](https://github.com/Unidata/netcdf-c/issues/400) and [Pull Request #403](https://github.com/Unidata/netcdf-c/issues/403) for more information.
98 * [Upgrade] The bash based test scripts have been upgraded to use a common test_common.sh include file that isolates build specific information.
99 * [Upgrade] The bash based test scripts have been upgraded to use a common test_common.sh include file that isolates build specific information.
100 * [Refactor] the oc2 library is no longer independent of the main netcdf-c library. For example, it now uses ncuri, nclist, and ncbytes instead of its homegrown equivalents.
101 * [Bug Fix] `NC_EGLOBAL` is now properly returned when attempting to set a global `_FillValue` attribute. See [GitHub #388](https://github.com/Unidata/netcdf-c/issues/388) and [GitHub #389](https://github.com/Unidata/netcdf-c/issues/389) for more information.
102 * [Bug Fix] Corrected an issue where data loss would occur when `_FillValue` was mistakenly allowed to be redefined. See [Github #390](https://github.com/Unidata/netcdf-c/issues/390), [GitHub #387](https://github.com/Unidata/netcdf-c/pull/387) for more information.
103 * [Upgrade][Bug] Corrected an issue regarding how "orphaned" DAS attributes were handled. See [GitHub #376](https://github.com/Unidata/netcdf-c/pull/376) for more information.
104 * [Upgrade] Update utf8proc.[ch] to use the version now maintained by the Julia Language project (https://github.com/JuliaLang/utf8proc/blob/master/LICENSE.md).
105 * [Bug] Addressed conversion problem with Windows sscanf. This primarily affected some OPeNDAP URLs on Windows. See [GitHub #365](https://github.com/Unidata/netcdf-c/issues/365) and [GitHub #366](https://github.com/Unidata/netcdf-c/issues/366) for more information.
106 * [Enhancement] Added support for HDF5 collective metadata operations when available. Patch submitted by Greg Sjaardema, see [Pull request #335](https://github.com/Unidata/netcdf-c/pull/335) for more information.
107 * [Bug] Addressed a potential type punning issue. See [GitHub #351](https://github.com/Unidata/netcdf-c/issues/351) for more information.
108 * [Bug] Addressed an issue where netCDF wouldn't build on Windows systems using MSVC 2012. See [GitHub #304](https://github.com/Unidata/netcdf-c/issues/304) for more information.
109 * [Bug] Fixed an issue related to potential type punning, see [GitHub #344](https://github.com/Unidata/netcdf-c/issues/344) for more information.
110 * [Enhancement] Incorporated an enhancement provided by Greg Sjaardema, which may improve read/write times for some complex files. Basically, linked lists were replaced in some locations where it was safe to use an array/table. See [Pull request #328](https://github.com/Unidata/netcdf-c/pull/328) for more information.
112 ## 4.4.1.1 - November 21, 2016
114 * [Bug] Fixed an issue where `ncgen` would potentially crash or write incorrect netCDF4 binary data under very specific circumstances. This bug did *not* affect data written on 32-bit systems or by using the netCDF library; it was specific to `ncgen`. This would only happen when writing a compound data type containing an 8-byte data type followed by a 4-byte data type *and* the 4-byte data type was not properly aligned; this would *possibly* result in incorrect padding. This did not affect 32-bit systems, or data written directly by the library. See [GitHub #323](https://github.com/Unidata/netcdf-c/issues/323) for more information.
115 * [Documentation] Updated documentation related to netCDF variable names and DAP2 access to reflect the undefined behavior potentially observed when DAP2 reserved keywords are used as netCDF variable names. See [GitHub #308](https://github.com/Unidata/netcdf-c/issues/308) for more information.
116 * [Bug] Fixed an issue with `nc_inq_type()` not returning proper value in some circumstances. See [GitHub #317](https://github.com/Unidata/netcdf-c/issues/317) for more information.
117 * [Bug] Corrected an issue related to test failures when `--disable-utilities` or `-DENABLE_UTILITIES=OFF` are specified when building with autotools or cmake, respectively. See [GitHub #313](https://github.com/Unidata/netcdf-c/issues/313) for more information.
118 * [Bug][Enhancement] Corrected a behavioral issue with the `_NCProperties` attribute taking up too much space. See [GitHub #300](https://github.com/Unidata/netcdf-c/issues/300) and [GitHub #301](https://github.com/Unidata/netcdf-c/pull/301) for more information.
120 * [Bug] Corrected behavior for `nc-config` so that, if `nf-config` is found in system, the proper fortran-related information will be conveyed. See [GitHub #296](https://github.com/Unidata/netcdf-c/issues/296] for more information.
122 ## 4.4.1 - June 28, 2016
124 * [File Change] Starting with release 4.4.1, netCDF-4 files created will have superblock version 0 instead of superblock version 2, as was observed in previous netCDF versions. This is due to a workaround required to avoid backwards binary incompatibility when using libhdf5 1.10.x or greater. Superblock versions 0 and 2 appear to be forward and backward compatible. Other than a different superblock number the data should remain consistent.
125 * [Enhancement] Added better error reporting when ncdump/nccopy are given a bad constraint in a DAP url. See [GitHub #279](https://github.com/Unidata/netcdf-c/pull/279) for more information.
127 ### 4.4.1-RC3 - June 17, 2016
129 * [Bug Fix] Misc. bug fixes and improvements.
130 * [Bug Fix] Corrected an issue where adding a \_FillValue attribute to a variable would result in other attributes being lost. See [GitHub #239](https://github.com/Unidata/netcdf-c/issues/239) for more details.
131 * [Bug Fix][Parallel I/O] Corrected an issue reported by Kent Yang at the HDF group related to Collective Parallel I/O and a potential hang.
133 ### 4.4.1-RC2 - May 13, 2016
135 * [Enhancement] Added provenance information to files created. This information consists of a persistent attribute named `_NCProperties` plus two computed attributes, `_IsNetcdf4` and `_SuperblockVersion`. Associated documentation was added to the file `docs/attribute_conventions.md`. See [GitHub pull request #260](https://github.com/Unidata/netcdf-c/pull/260) for more information.
136 * [Bug Fix] Cleaned up some dead links in the doxygen-generated documentation.
137 * [Bug Fix] Corrected several issues related to building under Visual Studio 2014.
138 * [Bug Fix] Corrected several test failures related to HDF5 `1.10.0`
139 * [Bug Fix] Reverted SOVersion *current* to 11 from 12; it was incorrectly incremented in netCDF-C release 4.4.1-RC1.
140 * [Enhancement][Windows] Bumped the included libhdf5 to 1.8.16 from 1.8.15 for pre-built Visual Studio installer files.
143 ### 4.4.1-RC1 - April 15, 2016
145 * [Bug Fix][Enhancement] Fixed an issue with netCDF4 files generated using version `1.10.0` of the HDF5 library. The 1.10 release potentially changed the underlying file format, introducing a backwards compatibility issue with the files generated. HDF5 provided an API for retaining the 1.8.x file format, which is now on by default. See [GitHub Issue #250](https://github.com/Unidata/netcdf-c/issues/250) for more information.
146 * [Bug Fix] Corrected an issue with autotools-based builds performed out-of-source-tree. See [GitHub Issue #242](https://github.com/Unidata/netcdf-c/issues/242) for more information.
147 * [Enhancement] Modified `nc_inq_type()` so that it would work more broadly without requiring a valid ncid. See [GitHub Issue #240](https://github.com/Unidata/netcdf-c/issues/240) for more information.
148 * [Enhancement] Accepted a patch code which added a hashmap lookup for rapid var and dim retrieval in nc3 files, contributed by Greg Sjaardema. See [GitHub Pull Request #238](https://github.com/Unidata/netcdf-c/pull/238) for more information.
149 * [Bug Fix] Accepted a contributed pull request which corrected an issue with how the cmake-generated `nc-config` file determined the location of installed files. See [GitHub Pull Request #235](https://github.com/Unidata/netcdf-c/pull/235) for more information.
150 * [Enhancement] Added an advanced option for CMake-based builds, `ENABLE_SHARED_LIBRARY_VERSION`. This option is `ON` by default, but if turned off, only `libnetcdf.dylib` will be generated, instead of files containing the SOVERSION in the file name. This is a requested feature most people might not care about. See [GitHub #228](https://github.com/Unidata/netcdf-c/issues/228) for more information.
151 * [Bug Fix] Corrected an issue with duplicated error codes defined in multiple header files. See [GitHub #213](https://github.com/Unidata/netcdf-c/issues/213) for more information.
152 * [Bug Fix] Addressed an issue specific to Visual Studio 2015 on Windows. On very large files, some calls to the `fstat` class of functions would fail for no apparent reason. This behavior was **not** observed under Visual Studio 2013. This has now been mitigated. See [GitHub #188](https://github.com/Unidata/netcdf-c/issues/188) for more information.
153 * [Enhancement] Updated `nc-config` to report whether `logging` is enabled in netcdf. Additionally, if `f03` is available in an installed netcdf-fortran library, it will now be reported as well.
154 * [Bug Fix] Addressed an issue where `netcdf_mem.h` was not being installed by cmake. See [GitHub #227](https://github.com/Unidata/netcdf-c/issues/227) for more information.
155 * [Bug Fix] Addressed an issue where `ncdump` would crash when trying to read a netcdf file containing an empty ragged `VLEN` variable in an unlimited dimension. See [GitHub #221](https://github.com/Unidata/netcdf-c/issues/221) for more information.
157 ## 4.4.0 Released - January 13, 2016
159 * Bumped SO version to 11.0.0.
161 * Modified `CMakeLists.txt` to work with the re-organized cmake configuration used by the latest HDF5, `1.8.16`, on Windows. Before this fix, netCDF would fail to locate hdf5 1.8.16 when using cmake on Windows. See [GitHub #186](https://github.com/Unidata/netcdf-c/issues/186) for more information.
163 * Addressed an issue with `ncdump` when annotations were used. The indices for the last row suffered from an off-by-1 error. See [GitHub issue #181](https://github.com/Unidata/netcdf-c/issues/181) for more information.
165 * Addressed an issue on platforms where `char` is `unsigned` by default (such as `ARM`), as well as an issue describing regarding undefined behavior, again on `ARM`. See [GitHub issue #159](https://github.com/Unidata/netcdf-c/issues/159) for detailed information.
167 * Fixed an ambiguity in the grammar for cdl files. See [GitHub #178](https://github.com/Unidata/netcdf-c/issues/178) for more information.
169 * Updated documentation for `nc_get_att_string()` to reflect the fact that it returns allocated memory which must be explicitly free'd using `nc_free_string()`. Reported by Constantine Khroulev, see [GitHub Issue 171](https://github.com/Unidata/netcdf-c/issues/171) for more information.
171 * Modified ncgen to properly handle the L and UL suffixes for integer constants
172 to keep backward compatibility. Now it is the case the single L suffix
173 (e.g. 111L) is treated as a 32 bit integer. This makes it consistent with
174 the fact that NC_LONG (netcdf.h) is an alias for NC_INT. Existing .cdl
175 files should be examined for occurrences of the L prefix to ensure that
176 this change will not affect them.
177 (see Github issue 156[https://github.com/Unidata/netcdf-c/issues/156]).
179 * Updated documentation to reference the new `NodeJS` interface to netcdf4, by Sven Willner. It is available from [https://www.npmjs.com/package/netcdf4](https://www.npmjs.com/package/netcdf4) or from the GitHub repository at [https://github.com/swillner/netcdf4-js](https://github.com/swillner/netcdf4-js).
181 * Incorporated pull request https://github.com/Unidata/netcdf-c/pull/150 from Greg Sjaardema to remove the internal hard-wired use of `NC_MAX_DIMS`, instead using a dynamic memory allocation.
183 ### 4.4.0-RC5 Released - November 11, 2015
185 * Added a fix for https://github.com/Unidata/netcdf-c/issues/149, which was reported several times in quick succession within an hour of the RC4 release.
187 ### 4.4.0-RC4 Released - November 10, 2015
189 * Added CDM-5 support via new mode flag called NC_64BIT_DATA (alias NC_CDF5).
191 Major kudos to Wei-Keng Liao for all the effort he put into getting this to work.
193 This cascaded into a number of other changes.
195 1. Renamed libsrcp5 -> libsrcp because PnetCDF can do parallel io for CDF-1, CDF-2 and CDF-5, not just CDF-5.
196 2. Given #1, then the NC_PNETCDF mode flag becomes a subset of NC_MPIIO, so made NC_PNETCDF an alias for NC_MPII.
197 3. NC_FORMAT_64BIT is now deprecated. Use NC_FORMAT_64BIT_OFFSET.
199 Further information regarding the CDF-5 file format specifrication may be found here: http://cucis.ece.northwestern.edu/projects/PnetCDF/CDF-5.html
201 * Modified configure.ac to provide finer control over parallel
202 support. Specifically, add flags for:
204 1. HDF5_PARALLEL when hdf5 library has parallel enabled
205 2. --disable-parallel4 to be used when we do not want
206 netcdf-4 to use parallelism even if hdf5 has it enabled.
209 * Deprecating various extended format flags.
211 The various extended format flags of the format `NC_FORMAT_FOO` have been refactored into the form `NC_FORMATX_FOO`. The old flags still exist but have been marked as deprecated and will be removed at some point. This was done to avoid confusion between the extended format flags and the format flags `NC_FORMAT_CLASSIC`, `NC_FORMAT_64BIT_OFFSET`, etc. The mapping of deprecated-to-new flags is as follows:
213 Deprecated | Replaced with
214 -----------|-------------
215 NC\_FORMAT\_NC3 | NC\_FORMATX\_NC3
216 NC\_FORMAT\_NC\_HDF5 | NC\_FORMATX\_NC\_HDF5
217 NC\_FORMAT\_NC4 | NC\_FORMATX\_NC4
218 NC\_FORMAT\_NC\_HDF4 | NC\_FORMATX\_NC\_HDF4
219 NC\_FORMAT\_PNETCDF | NC\_FORMATX\_PNETCDF
220 NC\_FORMAT\_DAP2 | NC\_FORMATX\_DAP2
221 NC\_FORMAT\_DAP4 | NC\_FORMATX\_DAP4
222 NC\_FORMAT\_UNDEFINED | NC\_FORMATX\_UNDEFINED
224 * Reduced minimum cmake version to `2.8.11` from `2.8.12`. This will allow for cmake use on a broader set of popular linux platforms without having to do a custom cmake install. See https://github.com/Unidata/netcdf-c/issues/135 for more information.
226 * The documentation section `The Default Chunking Scheme` has been updated with more information. This lives in the `guide.dox` file in the `docs/` directory, or can be found online in the appropriate location (typically http://www.unidata.ucar.edu/netcdf/docs/), once this release has been published.
228 ### 4.4.0-RC3 2015-10-08
230 * Addressed an inefficiency in how bytes would be swapped when converting between `LITTLE` and `BIG` ENDIANNESS. See [NCF-338](https://bugtracking.unidata.ucar.edu/browse/NCF-338) for more information.
232 * Addressed an issue where an interrupted read on a `POSIX` system would return an error even if errno had been properly set to `EINTR`. This issue was initially reported by David Knaak at Cray. More information may be found at [NCF-337](https://bugtracking.unidata.ucar.edu/browse/NCF-337).
234 * Added a note to the install directions pointing out that parallel make
235 cannot be used for 'make check'.
237 ### 4.4.0-RC2 Released 2015-07-09
239 * Minor bug fixes and cleanup of issues reported with first release candidate.
241 ### 4.4.0-RC1 Released 2015-06-09
243 * The pre-built Windows binaries are now built using `Visual Studio 2012`, instead of `Visual Studio 2010`. Source-code compilation remains function with `Visual Studio 2010`, this is just a change in the pre-built binaries.
245 * Added support for opening in-memory file content. See `include/netcdf_mem.h` for the procedure signature. Basically, it allows one to fill a chunk of memory with the equivalent of some netCDF file and then open it and read from it as if it were any other file. See [NCF-328](https://bugtracking.unidata.ucar.edu/browse/NCF-328) for more information.
247 * Addressed an issue when reading hdf4 files with explicit little-endian datatypes. This issue was [reported by Tim Burgess at GitHub](https://github.com/Unidata/netcdf-c/issues/113). See [NCF-332](https://bugtracking.unidata.ucar.edu/browse/NCF-332) for more information.
249 * Addressed an issue with IBM's `XL C` compiler on AIX and how it handled some calls to malloc. Also, as suggested by Wolfgang Hayek, developers using this compiler may need to pass `CPPFLAGS=-D_LINUX_SOURCE_COMPAT` to avoid some test failures.
251 * Addressed an issure in netcdf4 related to specifying an endianness explicitly. When specifying an endianness for `NC_FLOAT`, the value would appear to not be written to file, if checked with `ncdump -s`. The issue was more subtle; the value would be written but was not being read from file properly for non-`NC_INT`. See [GitHub Issue](https://github.com/Unidata/netcdf-c/issues/112) or [NCF-331](https://bugtracking.unidata.ucar.edu/browse/NCF-331) for more information.
253 * Addressed an issue in netcdf4 on Windows w/DAP related to how byte values were copied with sscanf. Issue originally reported by Ellen Johnson at Mathworks, see [NCF-330](https://bugtracking.unidata.ucar.edu/browse/NCF-330) for more information.
255 * Addressed in issue in netcdf4 files on Windows, built with Microsoft Visual Studio, which could result in a memory leak. See [NCF-329](https://bugtracking.unidata.ucar.edu/browse/NCF-329) for more information.
257 * Addressed an issue in netcdf4 files where writing unlimited dimensions that were not declared at head of the dimensions list, as reported by Ellen Johnson at Mathworks. See [NCF-326](https://bugtracking.unidata.ucar.edu/browse/NCF-326) for more information.
259 * Added an authorization reference document as oc2/ocauth.html.
261 * Fixed bug resulting in segmentation violation when trying to add a
262 _FillValue attribute to a variable in an existing netCDF-4 file
263 defined without it (thanks to Alexander Barth). See
264 [NCF-187](https://bugtracking.unidata.ucar.edu/browse/NCF-187) for
267 ## 4.3.3.1 Released 2015-02-25
269 * Fixed a bug related to renaming the attributes of coordinate variables in a subgroup. See [NCF-325](https://bugtracking.unidata.ucar.edu/browse/NCF-325) for more information.
271 ## 4.3.3 Released 2015-02-12
273 * Fixed bug resulting in error closing a valid netCDF-4 file with a dimension and a non-coordinate variable with the same name. [NCF-324](https://bugtracking.unidata.ucar.edu/browse/NCF-324)
275 * Enabled previously-disabled shell-script-based tests for Visual Studio when `bash` is detected.
277 ### 4.3.3-rc3 Released 2015-01-14
279 * Added functionality to make it easier to build `netcdf-fortran` as part of the `netcdf-c` build for *NON-MSVC* builds. This functionality is enabled at configure time by using the following **Highly Experimental** options:
281 * CMake: `-DENABLE_REMOTE_FORTRAN_BOOTSTRAP=ON`
282 * Autotools: `--enable-remote-fortran-bootstrap`
284 Details are as follows:
288 Enabling these options creates two new make targets:
290 * `build-netcdf-fortran`
291 * `install-netcdf-fortran`
293 Example Work Flow from netcdf-c source directory:
295 * $ `./configure --enable-remote-fortran-bootstrap --prefix=$HOME/local`
298 * $ `make build-netcdf-fortran`
299 * $ `make install-netcdf-fortran`
301 > These make targets are **only** valid after `make install` has been invoked. This cannot be enforced rigidly in the makefile for reasons we will expand on in the documentation, but in short: `make install` may require sudo, but using sudo will discard environmental variables required when attempting to build netcdf-fortran in this manner.<br><br>
303 > It is important to note that this is functionality is for *convenience only*. It will remain possible to build `netcdf-c` and `netcdf-fortran` manually. These make targets should hopefully suffice for the majority of our users, but for corner cases it may still be required of the user to perform a manual build. [NCF-323](https://bugtracking.unidata.ucar.edu/browse/NCF-323)
307 * Added a failure state if the `m4` utility is not found on non-Windows systems; previously, the build would fail when it reached the point of invoking m4.
309 * Added an explicit check in the build systems (autotools, cmake) for the CURL-related option `CURLOPT_CHUNK_BGN_FUNCTION`. This option was introduced in libcurl version `7.21.0`. On installations which require libcurl and have this version, `CURLOPT_CHUNK_BGN_FUNCTION` will be available. Otherwise, it will not.
311 * The PnetCDF support was not properly being used to provide mpi parallel io for netcdf-3 classic files. The wrong dispatch table was being used. [NCF-319](https://bugtracking.unidata.ucar.edu/browse/NCF-319)
313 * In nccopy utility, provided proper default for unlimited dimension in chunk-size specification instead of requiring explicit chunk size. Added associated test. [NCF-321](https://bugtracking.unidata.ucar.edu/browse/NCF-321)
315 * Fixed documentation typo in FILL_DOUBLE definition in classic format specification grammar. Fixed other typos and inconsistencies in Doxygen version of User Guide.
317 * For nccopy and ncgen, added numeric options (-3, -4, -6, -7) for output format, to provide less confusing format version specifications than the error-prone equivalent -k options (-k1, -k2, -k3, -k4). The new numeric options are compatible with NCO's mnemonic version options. The old -k numeric options will still be accepted but are deprecated, due to easy confusion between format numbers and format names. [NCF-314](https://bugtracking.unidata.ucar.edu/browse/NCF-314)
319 * Fixed bug in ncgen. When classic format was in force (k=1 or k=4), the "long" datatype should be treated as int32. Was returning an error. [NCF-318](https://bugtracking.unidata.ucar.edu/browse/NCF-318)
321 * Fixed bug where if the netCDF-C library is built with the HDF5 library but without the HDF4 library and one attempts to open an HDF4 file, an abort occurs rather than returning a proper error code (NC_ENOTNC). [NCF-317](https://bugtracking.unidata.ucar.edu/browse/NCF-317)
323 * Added a new option, `NC_EXTRA_DEPS`, for cmake-based builds. This is analogous to `LIBS` in autotools-based builds. Example usage:
325 $ cmake .. -NC_EXTRA_DEPS="-lcustom_lib"
327 More details may be found at the Unidata JIRA Dashboard. [NCF-316](https://bugtracking.unidata.ucar.edu/browse/NCF-316)
330 ### 4.3.3-rc2 Released 2014-09-24
332 * Fixed the code for handling character constants
333 in datalists in ncgen. Two of the problems were:
334 1. It failed on large constants
335 2. It did not handle e.g. var = 'a', 'b', ...
336 in the same way that ncgen3 did.
337 See [NCF-309](https://bugtracking.unidata.ucar.edu/browse/NCF-309).
339 * Added a new file, `netcdf_meta.h`. This file is generated automatically at configure time and contains information related to the capabilities of the netcdf library. This file may be used by projects dependent upon `netcdf` to make decisions during configuration, based on how the `netcdf` library was built. The macro `NC_HAVE_META_H` is defined in `netcdf.h`. Paired with judicious use of `ifdef`'s, this macro will indicate to developers whether or not the meta-header file is present. See [NCF-313](https://bugtracking.unidata.ucar.edu/browse/NCF-313).
341 > Determining the presence of `netcdf_meta.h` can also be accomplished by methods common to autotools and cmake-based build systems.
343 * Changed `Doxygen`-generated documentation hosted by Unidata to use more robust server-based searching.
344 * Corrected embedded URLs in release notes.
345 * Corrected an issue where building with HDF4 support with Visual Studio would fail.
347 ### 4.3.3-rc1 Released 2014-08-25
349 * Added `CMake`-based export files, contributed by Nico Schlömer. See https://github.com/Unidata/netcdf-c/pull/74.
351 * Documented that ncgen input can come from standard input.
353 * Regularized generation of libnetcdf.settings file to make parsing it easier.
355 * Fixed ncdump bug for char variables with multiple unlimited dimensions and added an associated test. Now the output CDL properly disambiguates dimension groupings, so that ncgen can generate the original file from the CDL. [NCF-310](https://bugtracking.unidata.ucar.edu/browse/NCF-310)
357 * Converted the [Manually-maintained FAQ page](http://www.unidata.ucar.edu/software/netcdf/docs/faq.html) into markdown and added it to the `docs/` directory. This way the html version will be generated when the rest of the documentation is built, the FAQ will be under version control, and it will be in a more visible location, hopefully making it easier to maintain.
359 * Bumped minimum required version of `cmake` to `2.8.12`. This was necessitated by the adoption of the new `CMAKE_MACOSX_RPATH` property, for use on OSX.
361 * Jennifer Adams has requested a reversion in behavior so that all dap requests include a constraint. Problem is caused by change in prefetch where if all variables are requested, then no constraint is generated. Fix is to always generate a constraint in prefetch.
362 [NCF-308](https://bugtracking.unidata.ucar.edu/browse/NCF-308)
364 * Added a new option for cmake-based builds, `ENABLE_DOXYGEN_LATEX_OUTPUT`. On those systems with `make` and `pdflatex`, setting this option **ON** will result in pdf versions of the documentation being built. This feature is experimental.
366 * Bumped minimum CMake version to `2.8.9` from `2.8.8` as part of a larger pull request contributed by Nico Schlömer. [Pull Request #64](https://github.com/Unidata/netcdf-c/pull/64)
368 * Replaced the `NetCDF Library Architecture` image with an updated version from the 2012 NetCDF Workshop slides.
370 * Fix HDF4 files to support chunking.
371 [NCF-272](https://bugtracking.unidata.ucar.edu/browse/NCF-272)
373 * NetCDF creates a `libnetcdf.settings` file after configuration now, similar to those generated by `HDF4` and `HDF5`. It is installed into the same directory as the libraries. [NCF-303](https://bugtracking.unidata.ucar.edu/browse/NCF-303).
376 * Renamed `man4/` directory to `docs/` to make the purpose and contents clearer. See [man4 vs. docs #60](https://github.com/Unidata/netcdf-c/issues/60).
378 * Removed redundant variable `BUILD_DOCS` from the CMake configuration file. See the issue at github: [#59](https://github.com/Unidata/netcdf-c/issues/59).
380 * Added missing documentation templates to `man4/Makefile.am`, to correct an issue when trying to build the local `Doxygen`-generated documentation. This issue was reported by Nico Schlömer and may be viewed on github. [Releases miss Doxygen files #56](https://github.com/Unidata/netcdf-c/issues/56)
382 * When the NC_MPIPOSIX flag is given for parallel I/O access and the HDF5 library does not have the MPI-POSIX VFD configured in, the NC_MPIPOSIX flag is transparently aliased to the NC_MPIIO flag within the netCDF-4 library.
384 ## 4.3.2 Released 2014-04-23
386 * As part of an ongoing project, the Doxygen-generated netcdf documentation has been reorganized. The goal is to make the documentation easier to parse, and to eliminate redundant material. This project is ongoing.
388 * The oc .dodsrc reader was improperly handling the user name and password entries. [NCF-299](https://bugtracking.unidata.ucar.edu/browse/NCF-299)
390 * CTestConfig.cmake has been made into a template so that users may easily specify the location of an alternative CDash-based Dashboard using the following two options:
392 * `NC_TEST_DROP_SITE` - Specify an alternative Dashboard by URL or IP address.
394 * `NC_CTEST_DROP_LOC_PREFIX` - Specify a prefix on the remote webserver relative to the root directory. This lets CTest accommodate dashboards that do not live at the top level of the web server.
396 * Return an error code on open instead of an assertion violation for truncated file.
398 * Documented limit on number of Groups per netCDF-4 file (32767).
400 ### 4.3.2-rc2 Released 2014-04-15
402 * Cleaned up a number of CMake inconsistencies related to CMake usage, parallel builds.
403 * Now passing -Wl,--no-undefined to linker when appropriate.
404 * Corrected an issue preventing large file tests from running correctly under Windows.
405 * Misc Bug Fixes detected by static analysis.
407 ### 4.3.2-rc1 Released 2014-03-20
409 * Pre-built Windows downloads will now be bundled with the latest (as of the time of this writing) versions of the various dependencies:
414 * Added a separate flag to enable DAP AUTH tests. These tests are disabled by default. The flags for autotools and CMAKE-based builds are (respectively):
415 * --enable-dap-auth-tests
416 * -DENABLE\_DAP\_AUTH\_TESTS
418 * Fixed small default chunk size for 1-dimensional record variables. [NCF-211](https://bugtracking.unidata.ucar.edu/browse/NCF-211)
420 * Cleaned up type handling in netCDF-4 to fix bugs with fill-values.
422 * Corrected "BAIL" macros to avoid infinite loop when logging is disabled and an error occurs.
424 * Refactored how types are used for attributes, variables, and committed types, clarifying and categorizing fields in structs, and eliminating duplicated type information between variables and types they use.
426 * Made type structure sharable by committed datatypes and variables that use it.
428 * Handled string datatypes correctly, particularly for fill value attributes. Expanded testing for string fill values.
430 * Simplified iteration of objects in the file when it's opened, tracking fewer objects and using less memory.
432 * Enabled netCDF-4 bit-for-bit reproducibility for nccopy and other applications (thanks to Rimvydas Jasinskas and Quincey Koziol) by turning off HDF5 object creation, access, and modification time tracking. [NCF-290](https://bugtracking.unidata.ucar.edu/browse/NCF-290)
434 * Addressed an issue where `cmake`-based builds would not properly create a `pkg-config` file. This file is now created properly by `cmake`. [NCF-288](https://bugtracking.unidata.ucar.edu/browse/NCF-288)
436 * Addressed an issue related to old DAP servers. [NCF-287](https://bugtracking.unidata.ucar.edu/browse/NCF-287)
438 * Modified nc_{get/put}_vars to no longer use
439 nc_get/put_varm. They now directly use nc_get/put_vara
440 directly. This means that nc_get/put_vars now work
441 properly for user defined types as well as atomic types.
442 [NCF-228] (https://bugtracking.unidata.ucar.edu/browse/NCF-228)
444 ## 4.3.1.1 Released 2014-02-05
446 This is a bug-fix-only release for version 4.3.1.
448 * Corrected a DAP issue reported by Jeff Whitaker related to non-conforming servers.
450 * Corrected an issue with DAP tests failing in a 64-bit Cygwin environment. [NCF-286](https://bugtracking.unidata.ucar.edu/browse/NCF-286)
452 ## 4.3.1 Released 2014-01-16
454 * Add an extended format inquiry method to the netCDF API: nc\_inq\_format\_extended. NC\_HAVE\_INQ\_FORMAT\_EXTENDED is defined in netcdf.h [NCF-273]
456 [NCF-273]:https://bugtracking.unidata.ucar.edu/browse/NCF-273
459 ### 4.3.1-rc6 Released 2013-12-19
461 * Fixed fill value handling for string types in nc4\_get\_vara().
463 * Corrected behavior of nc\_inq\_unlimdim and nv\_inq\_unlimdims to report dimids
464 in same order as nc\_inq\_dimids.
466 * Addressed an issue reported by Jeff Whitaker regarding `nc_inq_nvars` returning an incorrect number of dimensions (this issue was introduced in 4.3.1-rc5). Integrated a test contributed by Jeff Whitaker.
468 * A number of previously-disabled unit tests were reviewed and made active.
471 ### 4.3.1-rc5 Released 2013-12-06
473 * When opening a netCDF-4 file, streamline the iteration over objects in the underlying HDF5 file.
475 * Fixed netCDF-4 failure when renaming a dimension and renaming a variable using that dimension, in either order. [NCF-177]
477 [NCF-177]:https://bugtracking.unidata.ucar.edu/browse/NCF-177
479 * When compiling with `hdf4` support, both autotools and cmake-based builds now properly look for the `libjpeg` dependency and will link against it when found (or complain if it's not). Also added `ENABLE_HDF4_FILE_TESTS` option to CMake-based builds.
481 * Fixed bug in ncgen; it was not properly filling empty string constants ("") to be the proper length. [NCF-279]
483 [NCF-279]:https://bugtracking.unidata.ucar.edu/browse/NCF-279
485 * Fixed bug in ncgen where it was interpreting int64 constants
486 as uint64 constants. [NCF-278]
488 [NCF-278]:https://bugtracking.unidata.ucar.edu/browse/NCF-278
490 * Fixed bug in handling Http Basic Authorization. The code was actually there but was not being executed. [NCF-277]
492 [NCF-277]:https://bugtracking.unidata.ucar.edu/browse/NCF-277
494 * Added hack to the DAP code to address a problem with the Columbia.edu server. That server does not serve up proper DAP2 DDS replies. The Dataset {...} name changes depending on if the request has certain kinds of constraints. [NCF-276]
496 [NCF-276]:https://bugtracking.unidata.ucar.edu/browse/NCF-276
498 * Fixed bugs with ncdump annotation of values, using -b or -f
501 [NCF-275]:https://bugtracking.unidata.ucar.edu/browse/NCF-275
504 ### 4.3.1-rc4 Released 2013-11-06
506 * Addressed an issue on Windows where `fstat` would report an incorrect file size on files > 4GB. [NCF-219]
509 * Added better documentation about accessing ESG datasets.
510 See http://www.unidata.ucar.edu/software/netcdf/docs/esg.html.
512 * Corrected an issue with CMake-based builds enabling HDF4 support where the HDF4 libraries were in a non-standard location.
514 * Fix bug introduced by [NCF-267] where octal constants above
515 '\177' were not recognized as proper octal constants. [NCF-271]
517 [NCF-271]:https://bugtracking.unidata.ucar.edu/browse/NCF-271
519 * Fixed an issue where the `netcdf.3` man page was not being installed by CMake-based builds. [Github](https://github.com/Unidata/netcdf-c/issues/3)
523 ### 4.3.1-rc3 Released 2013-09-24
525 * Modify ncgen to support NUL characters in character array
528 [NCF-267]:https://bugtracking.unidata.ucar.edu/browse/NCF-267
530 * Modify ncgen to support disambiguating references to
531 an enum constant in a data list. [NCF-265]
533 [NCF-265]:https://bugtracking.unidata.ucar.edu/browse/NCF-265
535 * Corrected bug in netCDF-4 dimension ID ordering assumptions, resulting in access that works locally but fails through DAP server. [NCF-166]
537 [NCF-166]:https://bugtracking.unidata.ucar.edu/browse/NCF-166
539 * Added a new configuration flag, `NC_USE_STATIC_CRT` for CMake-based Windows builds. The default value is 'OFF'. This will allow the user to define whether to use the shared CRT libraries (\\MD) or static CRT libraries (\\MT) in Visual Studio builds.
541 * Ensure netCDF-4 compiles with OpenMPI as an alternative to MPICH2. [NCF-160]
543 [NCF-160]:https://bugtracking.unidata.ucar.edu/browse/NCF-160
545 * Addressed issue with hanging Parallel netCDF-4 using HDF5 1.8.10. [NCF-240]
547 [NCF-240]:https://bugtracking.unidata.ucar.edu/browse/NCF-240
549 * Addressed issue with Large File Support on Windows, using both 32 and 64-bit builds. [NCF-219]
551 [NCF-219]:https://bugtracking.unidata.ucar.edu/browse/NCF-219
553 * Removed deprecated directories:
559 ### 4.3.1-rc2 Released 2013-08-19
561 * Added `configure` and accompanying configuration files/templates to release repository. **These will only be added to tagged releases on GitHub**.
563 * Integrated a fix by Quincey Koziol which addressed a variation of [NCF-250], *Fix issue of netCDF-4 parallel independent access with unlimited dimension hanging*.
565 [NCF-250]:https://bugtracking.unidata.ucar.edu/browse/NCF-250
567 * Integrated change contributed by Orion Poplawski which integrated GNUInstallDirs into the netCDF-C CMake system; this will permit systems that install into lib64 (such as Fedora) to `make install` without problem.
569 * Corrected an error with the CMake config files that resulted in the `netcdf.3` manpage not being built or installed.
571 ### 4.3.1-rc1 Released 2013-08-09
573 * Migrated from the netCDF-C `subversion` repository to a publicly available GitHub repository available at https://github.com/Unidata/netCDF-C. This repository may be checked out (cloned) with the following command:
575 $ git clone https://github.com/Unidata/netCDF-C.git
577 * Note: in this release, it is necessary to generate the `configure` script and makefile templates using `autoreconf` in the root netCDF-C directory.:
581 * Added `nc_rename_grp` to allow for group renaming in netCDF-4 files. [NCF-204]
583 [NCF-204]: https://bugtracking.unidata.ucar.edu/browse/NCF-204
585 * Added a `NC_HAVE_RENAME_GRP` macro to netcdf.h, [as per a request by Charlie Zender][cz1]. This will allow software compiling against netcdf to easily query whether or not nc\_rename\_grp() is available.
587 [cz1]: https://bugtracking.unidata.ucar.edu/browse/NCF-204
589 * Added Greg Sjaardema's contributed optimization for the nc4\_find\_dim\_len function in libsrc4/nc4internal.c. The patch eliminates several malloc/free calls that exist in the original coding.
591 * Added support for dynamic loading, to compliment the dynamic loading support introduced in hdf 1.8.11. Dynamic loading support depends on libdl, and is enabled as follows: [NCF-258]
592 * autotools-based builds: --enable-dynamic-loading
593 * cmake-based builds: -DENABLE\_DYNAMIC\_LOADING=ON
595 [NCF-258]: https://bugtracking.unidata.ucar.edu/browse/NCF-258
597 * Fix issue of netCDF-4 parallel independent access with unlimited dimension hanging. Extending the size of an unlimited dimension in HDF5 must be a collective operation, so now an error is returned if trying to extend in independent access mode. [NCF-250]
599 [NCF-250]: https://bugtracking.unidata.ucar.edu/browse/NCF-250
601 * Fixed bug with netCDF-4's inability to read HDF5 scalar numeric attributes. Also allow, in addition to zero length strings, a new NULL pointer as a string value. to improve interoperability with HDF5. This required a new CDL constant, 'NIL', that can be output from ncdump for such a string value in an HDF5 or netCDF-4 file. The ncgen utility was also modified to properly handle such NIL values for strings. [NCF-56]
603 [NCF-56]: https://bugtracking.unidata.ucar.edu/browse/NCF-56
605 * Parallel-build portability fixes, particularly for OpenMPI and gcc/gfortran-4.8.x on OSX.
607 * Fix contributed by Nath Gopalaswamy to large file problem reading netCDF classic or 64-bit offset files that have a UINT32_MAX flag for large last record size of a variable that has values larger than 1 byte. This problem had previously been fixed for *writing* such data, but was only tested with an ncbyte variable.
609 * Fixed various minor documentation problems.
611 ## 4.3.0 Released 2013-04-29
613 * fsync: Changed default in autotools config file; fsync must now be
614 explicitly enabled instead of explicitly disabled. [NCF-239]
616 [NCF-239]: https://bugtracking.unidata.ucar.edu/browse/NCF-239
618 * Fixed netCDF-4 bug where odometer code for libdap2 mishandled stride > 1. Bug reported by Ansley Manke. [NCF-249]
620 [NCF-249]: https://bugtracking.unidata.ucar.edu/browse/NCF-249
622 * Fixed netCDF-4 bug so netCDF just ignores objects of HDF5 reference type in
623 the file, instead of rejecting the file. [NCF-29]
625 [NCF-29]: https://bugtracking.unidata.ucar.edu/browse/NCF-29
627 * Fixed netCDF-4 bug with particular order of creation of dimensions,
628 coordinate variables, and subgroups resulting in two dimensions with the
629 same dimension ID. [NCF-244]
631 [NCF-244]: https://bugtracking.unidata.ucar.edu/browse/NCF-244
633 * Fixed netCDF-4 bug with a multidimensional coordinate variable in a
634 subgroup getting the wrong dimension IDs for its dimensions. [NCF-247]
636 [NCF-247]: https://bugtracking.unidata.ucar.edu/browse/NCF-247
638 * Fixed bug with incorrect fixed-size variable offsets in header getting
639 written when schema changed for files created by PnetCDF Thanks
640 to Wei-keng Liao for developing and contributing the fix. [NCF-234]
642 [NCF-234]: https://bugtracking.unidata.ucar.edu/browse/NCF-234
644 * Fixed bug in handling old servers that do not do proper Grid to
645 Structure conversions. [NCF-232]
647 [NCF-232]: https://bugtracking.unidata.ucar.edu/browse/NCF-232
649 * Replaced the oc library with oc2.0
651 * Fix bug with nc\_get\_var1\_uint() not accepting unsigned ints larger
652 than 2\*\*31. [NCF-226]
654 [NCF-226]: https://bugtracking.unidata.ucar.edu/browse/NCF-226
656 * Fix to convert occurrences of '/' in DAP names to %2f. [NCF-223]
658 [NCF-223]: https://bugtracking.unidata.ucar.edu/browse/NCF-223
660 * Fix bug in netCDF-4 with scalar non-coordinate variables with same name
661 as dimensions. [NCF-222]
663 [NCF-222]: https://bugtracking.unidata.ucar.edu/browse/NCF-222
665 * Fix bug in which calling netCDF-4 functions in which behavior that
666 should not depend on order of calls sometimes produces the wrong
669 [NCF-217]: https://bugtracking.unidata.ucar.edu/browse/NCF-217
671 * Merged in nccopy additions from Martin van Driel to support -g and -v
672 options for specifying which groups or variables are to be copied.
675 [NCF-216]: https://bugtracking.unidata.ucar.edu/browse/NCF-216
677 * Merged in PnetCDF bugs fixes from Greg Sjaardema. [NCF-214]
679 [NCF-214]: https://bugtracking.unidata.ucar.edu/browse/NCF-214
681 * Modify ncgen so that if the incoming file has a special attribute, then
682 it is used to establish the special property of the netcdf file, but the
683 attribute is not included as a real attribute in the file. [NCF-213].
685 [NCF-213]: https://bugtracking.unidata.ucar.edu/browse/NCF-213
687 * Added library version info to the user-agent string so that the server
688 logs will be more informative. [NCF-210]
690 [NCF-210]: https://bugtracking.unidata.ucar.edu/browse/NCF-210
692 * Added work around for bad servers that sometimes sends DAP dataset with
693 duplicate field names. [NCF-208]
695 [NCF-208]: https://bugtracking.unidata.ucar.edu/browse/NCF-208
697 * Fixed bug with strided access for NC\_STRING type. [NCF-206]
699 [NCF-206]: https://bugtracking.unidata.ucar.edu/browse/NCF-206
701 * Prevented adding an invalid \_FillValue attribute to a variable (with
702 nonmatching type or multiple values), to avoid later error when any
703 record variable is extended. [NCF-190]
705 [NCF-190]: https://bugtracking.unidata.ucar.edu/browse/NCF-190
707 * Fix bug in which some uses of vlen within compounds causes HDF5 errors.
710 [NCF-155]: https://bugtracking.unidata.ucar.edu/browse/NCF-155
712 * Fixed ncdump bug in display of data values of variables that use
713 multiple unlimited dimensions. [NCF-144]
715 [NCF-144]: https://bugtracking.unidata.ucar.edu/browse/NCF-144
717 * Fix bug in which interspersing def\_var calls with put\_var calls can
718 lead to corrupt metadata in a netCDF file with groups and inherited
719 dimensions. [NCF-134]
721 [NCF-134]: https://bugtracking.unidata.ucar.edu/browse/NCF-134
723 * Building shared libraries works with DAP and netCDF4 functionality.
726 [NCF-205]: https://bugtracking.unidata.ucar.edu/browse/NCF-205
727 [NCF-57]: https://bugtracking.unidata.ucar.edu/browse/NCF-57
729 * 32-and-64-bit builds are working under MinGW on Windows. [NCF-112]
731 [NCF-112]: https://bugtracking.unidata.ucar.edu/browse/NCF-112
733 * Config.h for Windows compiles are included in the build. [NCF-98]
735 [NCF-98]: https://bugtracking.unidata.ucar.edu/browse/NCF-98
737 * NetCDF-4 dependency on NC\_MAX\_DIMS has been removed. [NCF-71]
739 [NCF-71]: https://bugtracking.unidata.ucar.edu/browse/NCF-71
741 * 64-bit DLL's are produced on Windows. [NCF-65]
743 [NCF-65]: https://bugtracking.unidata.ucar.edu/browse/NCF-65
745 * DLL Packaging issues are resolved. [NCF-54]
747 [NCF-54]: https://bugtracking.unidata.ucar.edu/browse/NCF-54
749 * The CMake build system (with related ctest and cdash systems for
750 testing) has been integrated into netCDF-C. This allows for Visual
751 Studio-based builds in addition to gcc-based builds. This requires at
752 least CMake version 2.8.8. This replaces/supplements the cross-compiled
753 set of Visual-Studio compatible netCDF libraries introduced in netCDF
756 ## 4.2.1.1 Released 2012-08-03
758 * Patched libdap2/ncdap3.c to fix DAP performance bug remotely accessing large files (> 2GiB).
760 * Patched ncdump/dumplib.c to properly escape special characters in CDL output from ncdump for netCDF-4 string data.
763 ### 4.2.1 Released 2012-07-18
765 * Added a specific NC\_MMAP mode flag to modify behavior of NC\_DISKLESS.
767 * Changed the file protections for NC\_DISKLESS created files to 0666
770 * Fixed ncdump to report error when an unsupported option is specified.
773 * Fixed documentation of CDL char constants in Users Guide and ncgen man
776 * Fixed memory leak detected by valgrind in one of the HDF5 tests.
778 * Fixed problem with \#elif directives in posixio.c revealed by PGI
781 ### 4.2.1-rc1 Released 2012-06-18
783 * Ported static and shared libraries (DLL's) for both 32- and 64-bit
784 Windows, including support for DAP remote access, with netCDF-3 and
785 netCDF-4/HDF5 support enabled. The environment for this build is
786 MSYS/MinGW/MinGW64, but the resulting DLLs may be used with Visual
787 Studio. [NCF-112] [NCF-54] [NCF-57] [NCF-65]
789 * Implemented diskless files for all netCDF formats. For nc\_create(),
790 diskless operation performs all operations in memory and then optionally
791 persists the results to a file on close. For nc\_open(), but only for
792 netcdf classic files, diskless operation caches the file in-memory,
793 performs all operations on the memory resident version and then writes
794 all changes back to the original file on close.
795 [NCF-110][NCF-109][NCF-5]
797 * Added MMAP support. If diskless file support is enabled, then it is
798 possible to enable implementation of diskless files using the operating
799 system's MMAP facility (if available). The enabling flag is
800 "--enable-mmap". This is most useful when using nc\_open() and when only
801 parts of files, a single variable say, need to be read.
803 * Added configure flag for --disable-diskless.
805 * Added nccopy command-line options to exploit diskless files, resulting
806 in large speedups for some operations, for example converting unlimited
807 dimension to fixed size or rechunking files for faster access. Upgraded
808 doxygen and man-page documentation for ncdump and nccopy utilities,
809 including new -w option for diskless nccopy, with an example.
811 * Modified Makefile to allow for concurrent builds and to support builds
812 outside the source tree, e.g. 'mkdir build; cd build;
813 SOURCE-DIR/configure' where SOURCE-DIR is the top-level source
816 * Fixed some netCDF-4 bugs with handling strings in non-netCDF-4 HDF5
819 * Fixed bug using nccopy to compress with shuffling that doesn't compress
820 output variables unless they were already compressed in the input file.
823 * Fixed bug in 64-bit offset files with large records, when last record
824 variable requires more than 2\*\*32 bytes per record. [NCF-164]
826 * Fix bug in which passing a NULL path to nc\_open causes failure.
829 * Fixed ncgen bugs in parsing and handling opaque data.
831 * Fixed ncdump bug, not escaping characters special to CDL in enumeration
834 * Fixed bug reading netCDF int into a C longlong or writing from longlong
835 to external int on 32-bit platforms with classic format files. The upper
836 32 bits of the longlong were not cleared on read or used on write.
839 * Resolved some erroneous returns of BADTYPE errors and RANGE errors due
840 to conflating C memory types with external netCDF types when accessing
841 classic or 64-bit offset files. [NCF-172]
843 * Fixed bug with ncdump -t interpreting unit attribute without base time
844 as a time unit. [NCF-175]
846 * Changed port for testing remote access test server to increase
847 reliability of tests.
849 * Modified ncio mechanism to support multiple ncio packages, so that it is
850 possible to have e.g. posixio and memio operating at the same time.
852 * Generation of documentation is disabled by default. Use --enable-doxygen
853 to generate. [NCF-168]
855 * Added description of configure flags to installation guide.
857 * Clarified documentation of arguments to nc**open() and nc**create() and
858 their default values.
860 * Fixed doxygen installation guide source file to preserve line breaks in
861 code and scripts. [NCF-174]
863 * Cleaned up a bunch of lint issues (unused variables, etc.) and some
864 similar problems reported by clang static analysis.
866 * Updated and fixed pkg-config source file netcdf.pc.in to work with
867 separated netCDF language-specific packages. Also fixed nc-config to
868 call nf-config, ncxx-config, and ncxx4-config for for backward
869 compatibility with use of nc-config in current Makefiles. [NCF-165]
874 * Completely rebuilt the DAP constraint handling. This primarily affects
875 users who specify a DAP constraint as part of their URL. [NCF-120]
877 * Fixed cause of slow nccopy performance on file systems with many records
878 and large disk block size or many record variables, by accessing data a
879 record at a time instead of a variable at a time. [NCF-142]
881 * Performance improvement to DAP code to support fetching partial
882 variables into the cache; especially important when using nc\_get\_var()
883 API. A partial variable is one that has ranges attached to the
884 projection variables (e.g. x[1:10][20:21]) [NCF-157]
886 * Separate the Fortran and C++ libraries and release the C library and
887 ncdump/ncgen/nccopy without Fortran or C++. [NCF-24]
889 * Documentation mostly migrated to Doxygen, from Texinfo. [NCF-26]
891 * Properly convert vara start/count parameters to DAP [NCF-105][NCF-106]
893 * Fixed major wasted space from previous default variable chunk sizes
896 * Fixed bug in nccopy, in which compression and chunking options were
897 ignored for netCDF-4 input files. [NCF-79]
899 * Fixed bug in ncgen in which large variables (more than 2**18 elements)
900 duplicates the first 2**18 values into subsequent chunks of data
903 * Applied Greg Sjaardema's nccopy bug fix, not compressing output
904 variables f they were not already using compression on the input file
905 when shuffle specified. [NCF-162]
907 * Fixed problem when a URL is provided that contains only a host name.
910 * Fixed behavior of ncgen flags so that -o => -lb and, in the absence of
911 any other markers, make the default be -k1 [NCF-158]
913 * Created a text INSTALL file for netCDF-4.2 release. [NCF-161]
915 * Fixed bug in ncgen for vlen arrays as fields of compound types where
916 datalists for those types was improperly interpreted [NCF-145] (but see
919 * Improve use of chunk cache in nccopy utility, making it practical for
920 rechunking large files. [NCF-85]
922 * Fixed nccopy bug copying a netCDF-4 file with a chunksize for an
923 unlimited dimension that is larger than the associated dimension size.
926 * Fixed nccopy bug when rechunking a netCDF-4 file with a chunkspec option
927 that doesn't explicitly specify all dimensions. [NCF-140]
929 * Fixed bug in netCDF-4 files with non-coordinate variable with the same
930 name as a dimension. [NCF-141]
932 * Incorporated Wei Huang's fix for bug where netCDF-4 sometimes skips over
933 too many values before adding fill values to an in-memory buffer.
936 * Fixed ncgen bug with netCDF-4 variable-length constants (H/T to Lynton
939 * Incorporated Peter Cao's performance fixes using HDF5 link iterator for
940 any group with many variables or types. [NCF-148]
942 * Incorporated Constantine Khroulev's bug fix for invalid usage of
943 MPI\_Comm\_f2c in nc\_create\_par. [NCF-135]
945 * Fixed turning off fill values in HDF5 layers when NOFILL mode is set in
946 netCDF-4 API (thanks to Karen Schuchardt). [NCF-151]
948 * Fixed bug with scalar coordinate variables in netCDF-4 files, causing
949 failure with --enable-extra-tests [NCF-149]
951 * Cleaned up the definition and use of nulldup. [NCF-92][NCF-93][NCF-94]
953 * Fixed various '\#include' bugs. [NCF-91][NCF-96][NCF-127]
955 * v2 API functions modified to properly call the external API instead of
956 directly calling the netcdf-3 functions. [NCF-100]
958 * Fixed problem with 64-bit offset format where writing more than 2\*\*31
959 records resulted in erroneous NC\_EINVALCOORDS error. [NCF-101]
961 * Restored original functionality of ncgen so that a call with no flags,
962 only does the syntax check. [NCF-104]
964 * Corrected misc. test bugs [NCF-107]
966 * Modified ncdump to properly output various new types (ubyte, ushort,
967 uint, int64, and uint64). [NCF-111]
969 * Fixed incorrect link flag for szip in configure.ac [NCF-116]
971 * ncdump -t now properly parses ISO "T" separator in date-time strings.
974 * ncdump -t "human time" functionality now available for attributes and
975 bounds variables [NCF-70]
977 * In ncdump, add -g option to support selection of groups for which data
978 is displayed. [NCF-11]
980 * Now supports bluefire platform [NCF-52]
982 * ncdump now properly displays values of attributes of type NC\_USHORT as
983 signed shorts [NCF-82]
985 * Rename some code files so that there are no duplicate filenames.
988 * Demonstration of netCDF-4 Performance Improvement with KNMI Data
991 * Dimension size in classic model netCDF-4 files now allows larger sizes
992 than allowed for 64-bit offset classic files. [NCF-117]
994 * ncdump now reports correct error message when "-x" option specifying
995 NcML output is used on netCDF-4 enhanced model input. [NCF-129]
997 * Fixed bug causing infinite loop in ncdump -c of netCDF-4 file with
998 subgroup with variables using inherited dimensions. [NCF-136]
1002 * Replace use of --with-hdf5= and other such configure options that
1003 violate conventions and causes build problems. Set environment variables
1004 CPPFLAGS, LDFLAGS, and LD\_LIBRARY\_PATH instead, before running
1005 configure script. [NCF-20]
1007 * Detect from configure script when szlib is needed [NCF-21]
1009 * Fix bug that can silently zero out portions of a file when writing data
1010 in nofill mode beyond the end of a file, crossing disk-block boundaries
1011 with region to be written while in-memory buffer is in a specific state.
1012 This bug was observed disabling fill mode using Lustre (or other large
1013 blksize file system) and writing data slices in reverse order on disk.
1016 * Fix bug that prevents netCDF-4/HDF5 files created with netCDF-4.1.2 from
1017 being read by earlier versions of netCDF or HDF5 versions before 1.8.7.
1020 * Fix bug in configure that did not make the search for the xdr library
1021 depend on --enable-dap. [NCF-41]
1023 * Fix ncgen bug that did not use the value of a \_Format attribute in the
1024 input CDL file to determine the kind of output file created, when not
1025 specified by the -k command-line flag. [NCF-42]
1027 * Fix ncgen bug, not properly handling unsigned longlong parsing. [NCF-43]
1029 * Fix DAP client code to suppress variables with names such as "x.y",
1030 which DAP protocol interprets as variable "y" inside container "x". Such
1031 variables will be invisible when accessed through DAP client. [NCF-47]
1033 * Define uint type for unsigned integer, if not otherwise available.
1034 Symptom was compile error involving uint in putget.c. [NCF-49]
1036 * Fix username+password handling in the DAP client code. [NCF-50]
1038 * Add test for handling parallel I/O problem from f77 when user forgets to
1039 turn on one of the two MPI flags. [NCF-60]
1041 * Resolved "make check" problems when ifort compiler. Some "make install"
1042 problems remain when using MPI and shared libraries. [NCF-61]
1044 * Fix problem with f90\_def\_var not always handle deflate setting when
1045 compiler was ifort. [NCF-67]
1047 * Check that either MPIIO or MPIPOSIX flag is set when parallel create or
1048 open is called. Also fix examples that didn't set at least one of these
1051 * Improve documentation on handling client-side certificates [NCF-48]
1053 * Document that array arguments, except in varm functions, must point to
1054 contiguous blocks of memory. [NCF-69]
1056 * Get netCDF-4 tests working for DLLs generated with mingw. [NCF-6]
1058 * Make changes necessary for upgrading to HDF5 1.8.7 [NCF-66]
1060 ### 4.1.3-rc1 2011-05-06
1062 * Stop looking for xdr if --disable-dap is used.
1064 * Don't try to run (some) fortran configure tests on machines with no
1067 * Allow nccopy to rechunk with chunksizes larger than current dimension
1070 * Initial implementation of CDMREMOTE is complete; needs comprehensive
1073 ### 4.1.3-beta1 2011-04-29
1075 * Fixed szlib not linking bug.
1077 * Fixed dreaded "nofill bug", lurking in netCDF classic since at least
1078 1999. Writing more than a disk block's worth of data that crossed disk
1079 block boundaries more than a disk block beyond the end of file in nofill
1080 mode could zero out recently written earlier data that hadn't yet been
1083 * Changed setting for H5Pset\_libver\_bounds to ensure that all netCDF-4
1084 files can be read by HDF5 1.8.x.
1086 * Merged libncdap3 and libncdap4 into new libdap2 library. The suffix dap2
1087 now refers to the dap protocol. This is in prep for adding dap4 protocol
1090 * Took out --with-hdf5 and related options due to high cost of maintaining
1091 this non-standard way of finding libraries.
1095 * Changes in build system to support building dlls on cygwin/mingw32.
1097 * Changes to fix portability problems and get things running on all test
1100 * Some minor documentation fixes.
1102 * Fixed opendap performance bug for nc\_get\_vars; required adding
1103 nc\_get\_var{s,m} to the dispatch table.
1105 * Now check for libz in configure.ac.
1107 * Fixed some bugs and some performance problems with default chunksizes.
1109 ### 4.1.2-beta2 2011-01-11
1111 * Add "-c" option to nccopy to specify chunk sizes used in output in terms
1112 of list of dimension names.
1114 * Rewrite netCDF-4 attribute put code for a large speedup when writing
1117 * Fix nc-config --libs when static dependent libraries are not installed
1118 in the same directory as netCDF libraries (thanks to Jeff Whitaker).
1120 * Build shared libraries by default, requiring separate Fortran library.
1121 Static libraries now built only with --disable-shared.
1123 * Refactor of HDF5 file metadata scan for large speedup in opening files,
1124 especially large files.
1126 * Complete rewrite of the handling of character datalist constants. The
1127 heuristics are documented in ncgen.1.
1129 * Eliminate use of NC\_MAX\_DIMS and NC\_MAX\_VARS in ncdump and nccopy,
1130 allocating memory as needed and reducing their memory footprint.
1132 * Add documentation for new nc\_inq\_path() function.
1134 * Use hashing to speedup lookups by name for files with lots of dimensions
1135 and variables (thanks to Greg Sjaardema).
1137 * Add options to nccopy to support uniform compression of variables in
1138 output, shuffling, and fixing unlimited dimensions. Documented in
1139 nccopy.1 man page and User's Guide.
1141 ### 4.1.2-beta1 2010-07-09
1143 * Fix "ncdump -c" bug identifying coordinate variables in groups.
1145 * Fix bug in libsrc/posixio.c when providing sizehint larger than default,
1146 which then doesn't get used (thanks to Harald Anlauf).
1148 * Fix netCDF-4 bug caused when doing enddef/redef and then defining
1149 coordinate variable out of order.
1151 * Fixed bug in man4 directory automake file which caused documentation to
1152 be rebuilt after make clean.
1154 * Turned off HDF5 caching when parallel I/O is in use because of its
1157 * Refactoring of netCDF code with dispatch layer to decide whether to call
1158 netCDF classic, netCDF-4, or opendap version of a function.
1160 * Refactoring of netCDF-4 memory internals to reduce memory use and end
1161 dependence on NC\_MAX\_DIMS and NC\_MAX\_NAME.
1163 * Modified constraint parser to be more compatible with a java version of
1166 * Modified ncgen to utilize iterators internally; should be no user
1169 * Fixed two large-file bugs with using classic format or 64-bit offset
1170 format and accessing multidimensional variables with more than 2\*\*32
1175 * Fixed various build issues.
1177 * Fixed various memory bugs.
1179 * Fixed bug for netCDF-4 files with dimensions and coord vars written in
1180 different orders, with data writes interspersed.
1182 * Added test for HDF5-1.8.4 bug.
1184 * Added new C++ API from Lynton Appel.
1188 * Much better memory leak checking with valgrind.
1190 * Added per-variable chunk cache control for better performance. Use
1191 nc\_set\_var\_chunk\_cache / nf\_set\_var\_chunk\_cache /
1192 nf90\_set\_var\_chunk\_cache to set the per-variable cache.
1194 * Automatically set per-variable chunk cache when opening a file, or
1195 creating a variable, so that the cache is big enough for more than one
1196 chunk. (Can be overridden by user). Settings may be changed with
1197 configure options --max-default-chunk-size and
1198 --default-chunks-in-cache.
1200 * Better default chunks size. Now chunks are sized to fit inside the
1201 DEFAULT\_CHUNK\_SIZE (settable at configure time with
1202 --with-default-chunk-size= option.)
1204 * Added nccopy utility for converting among netCDF format variants or to
1205 copy data from DAP servers to netCDF files.
1207 * The oc library has been modified to allow the occurrence of alias
1208 definitions in the DAS, but they will be ignored.
1210 * The old ncgen has been moved to ncgen3 and ncgen is now the new ncgen4.
1212 * Modified --enable-remote-tests to be on by default.
1214 * Fixed the nc\_get\_varm code as applied to DAP data sources.
1216 * Added tests for nc-config.
1218 * Many documentation fixes.
1220 * Added capability to use the PnetCDF library to
1221 perform parallel I/O on classic and 32-bit offset files. Use the
1222 NC\_PNETCDF mode flag to get parallel I/O for non-netcdf-4 files.
1224 * Added libcf library to netCDF distribution. Turn it on with configure
1225 option --with-libcf.
1227 * Added capability to read HDF4 files created with the SD (Scientific
1230 * The DAP support was revised to closely mimic the original libnc-dap
1233 * Significantly revised the data handling mechanism in ncgen4 to more
1234 closely mimic the output from the original ncgen.
1236 * Added prototype NcML output capability to ncgen4. It is specified by the
1239 * Added capability to read HDF5 files without dimension scales. This will
1240 allow most existing HDF5 datasets to be read by netCDF-4.
1242 * Fixed bug with endianness of default fill values for integer types when
1243 variables are created with a non-native endiannesss and use the default
1246 * Significant refactoring of HDF5 type handling to improve performance and
1247 handle complicated nesting of types in cross-platform cases.
1249 * Added UDUNITS2 to the distribution. Use --with-udunits to build udunits
1252 * Made changes suggested by HDF5 team to relax creation-order requirement
1253 (for read-only cases) which allows HDF5 1.6.x files to be retrofitted
1254 with dimension scales, and be readable to netCDF-4.
1256 * Handle duplicate type names within different groups in ncdump. Fix group
1257 path handling in absolute and relative variable names for "-v" option.
1259 * Added nc-config shell script to help users build netCDF programs without
1260 having to figure out all the compiler options they will need.
1262 * Fixed ncdump -s bug with displaying special attributes for classic and
1263 64-bit offset files.
1265 * For writers, nc\_sync() now calls fsync() to flush data to disk sooner.
1267 * The nc\_inq\_type() function now works for primitive types.
1271 * Added optional arguments to F90 API to nf90\_open/create,
1272 nf90\_create\_var, and nf90\_inquire\_variable so that all netCDF-4
1273 settings may be accomplished with optional arguments, instead of
1274 separate function calls.
1276 * Added control of HDF5 chunk cache to allow for user performance tuning.
1278 * Added parallel example program in F90.
1280 * Changed default chunking to better handle very large variables.
1282 * Made contiguous the default for fixed size data sets with no filters.
1284 * Fixed bug in nc\_inq\_ncid; now it returns NC\_ENOGRP if the named group
1287 * Fixed man pages for C and F77 so that netCDF-4 builds will result in man
1288 pages that document new netCDF-4 functions.
1290 * Added OPeNDAP support based on a new C-only implementation. This is
1291 enabled using --enable-dap option and requires libcurl. The configure
1292 script will attempt to locate libcurl, but if it fails, then its
1293 location must be specified by the --with-curl option.
1295 ### 4.0.1-beta2 2008-12-26
1297 * Changed chunksizes to size\_t from int.
1299 * Fixed fill value problem from F77 API.
1301 * Fixed problems in netcdf-4 files with multi-dimensional coordinate
1304 * Fixed ncgen to properly handle CDL input that uses Windows line endings
1305 ("\r\n"), instead of getting a syntax error.
1307 * Added "-s" option to ncdump to display performance characterisitics of
1308 netCDF-4 files as special virtual attributes, such as \_Chunking,
1309 \_DeflateLevel, \_Format, and \_Endianness.
1311 * Added "-t" option to ncdump to display times in human readable form as
1312 strings. Added code to interpret "calendar" attribute according to CF
1313 conventions, if present, in displaying human-readable times.
1315 * Added experimental version of ncgen4 capable of generating netcdf-4 data
1316 files and C code for creating them. In addition, it supports the special
1317 attributes \_Format, etc.
1319 * 4.0.1-beta1 2008-10-16
1321 * Fixed Fortran 90 int64 problems.
1323 * Rewrote HDF5 read/write code in accordance with performance advice from
1326 * Fixed memory leaks in gets/puts of HDF5 data.
1328 * Fixed some broken tests for parallel I/O (i.e. MPI) builds.
1330 * Fixed some cross-compile problems.
1332 * Rewrote code which placed bogus errors on the HDF5 error stack, trying
1333 to open non-existent attributes and variables. Now no HDF5 errors are
1336 * Removed man subdirectory. Now man4 subdirectory is used for all builds.
1338 * Changed build so that users with access to parallel make can use it.
1340 * Added experimental support for accessing data through OPeNDAP servers
1341 using the DAP protocol (use --enable-opendap to build it).
1343 * Fixed ncdump bugs with array field members of compound type variables.
1344 Fixed ncdump bug of assuming default fill value for data of type
1349 * Introduced the use of HDF5 as a storage layer, which allows use of
1350 groups, user-defined types, multiple unlimited dimensions, compression,
1351 data chunking, parallel I/O, and other features. See the netCDF Users
1352 Guide for more information.
1356 * In ncdump and ncgen, added CDL support for UTF-8 encoding of characters
1357 in names and for escaped special chars in names. Made sure UTF-8 names
1358 are normalized using NFC rules before storing or comparing.
1360 * Handle IEEE NaNs and infinities in a platform-independent way in ncdump
1363 * Added support for ARM representation of doubles, (thanks to Warren
1366 * Fixed bug in C++ API creating 64-bit offset files. (See
1367 http://www.unidata.ucar.edu/software/netcdf/docs/known_problems.html#cxx_64-bit).
1369 * Fixed bug for variables larger than 4 GB. (See
1370 http://www.unidata.ucar.edu/software/netcdf/docs/known_problems.html#large_vars_362).
1372 * Changed the configure.ac to build either 3.6.x or 4.x build from the
1375 * Build now checks gfortran version and handles it cleanly, also Portland
1376 Group in Intel fortran, with various configurations.
1378 * A Fortran netcdf.inc file is now created at build time, based on the
1379 setting of --disable-v2.
1381 * Documentation has been fixed in several places.
1383 * Upgraded to automake 1.10, autoconf 2.62, and libtool 2.2.2.
1385 * Includes missing Windows Visual Studio build files.
1387 * Fixed missing include of config.h in a C++ test program.
1389 * Fixed maintainer-clean in man directory.
1391 * Fixed --enable-c-only and make check.
1393 * Fixed behavior when opening a zero-length file.
1395 * Many portability enhancements to build cleanly on various platforms.
1397 * Turned on some old test programs which were not being used in the build.
1403 ### 3.6.2 beta6 2007-01-20
1405 * Fine tuning of build system to properly handle cygwin, Mingw, and
1406 strange configuration issues.
1408 * Automake 1.10 has a problem with running our tests on MinGW, so I'm
1409 switching back to automake 1.9.6 for this release.
1411 ### 3.6.2 beta5 2006-12-30
1413 * Now netCDF configuration uses autoconf 2.61, and automake 1.10. (Thanks
1414 to Ralf Wildenhues for the patches, and all the autotools help in
1417 * Final major revision of netCDF tutorial before the 3.6.2 release.
1419 * Now netCDF builds under MinGW, producing a windows DLL with the C and
1420 F77 APIs. Use the --enable-shared --enable-dll --disable-cxx
1421 --disable-f90 flags to configure. (C++ and F90 have never been built as
1422 windows DLLs, but might be in a future release if there is user
1423 interest). This has all been documented in the netCDF Porting and
1426 * Now extreme numbers (i.e. those close to the limits of their type) can
1427 be turned off in nc\_test/nf\_test, with --disable-extreme-numbers. It
1428 is turned off automatically for Solaris i386 systems.
1430 * Added --enable-c-only option to configure. This causes only the core
1431 netCDF-3 C library to be built. It's the same as --disable-f77
1432 --disable-cxx --disable-v2 --disable-utilities.
1434 * Added --disable-utilities to turn off building and testing of
1437 * Fix a long-standing bug in nf90\_get\_att\_text() pointed out by Ryo
1438 Furue, to make sure resulting string is blank-padded on return. This is
1439 fixed in the Fortran-90 interface, but is impractical to fix in the
1440 Fortran-77 interface implemented via cfortran.h.
1442 * Now large file tests are run if --enable-large-file-tests is used in the
1445 * For Cray users, the ffio module is used if the --enable-ffio option is
1446 passed to configure.
1448 * Unrolled loops in byte-swapping code used on little-endian platforms to
1449 reduce loop overhead. This optimization resulted in a 22% speedup for
1450 some applications accessing floats or ints (e.g. NCO utilities ncap and
1451 ncbo) and a smaller speedup for shorts or doubles.
1453 * Added "-k" option to ncdump and ncgen, for identifying and specifying
1454 the kind of netCDF file, one of "classic", "64-bit-offset", "hdf5", or
1455 "hdf5-nc3". Removed output of kind of netCDF file in CDL comment
1458 * Fixed bug of ncdump seg-faulting if invoked incorrectly with option like
1459 "-c" or "-h" but no file name.
1461 ### 3.6.2 beta4 2006-08-15
1463 * Changed F77/F90 man pages from netcdf.3f and netcdf.3f90 to
1464 netcdf\_f77.3 and netcdf\_f90.3. Also fixed broken install of man pages.
1466 * Changed configure script so that "-g -O2" is no longer set as CFLAGS,
1467 CXXFLAGS, and FFLAGS by default if a GNU compiler is being used. Now
1470 * Changed configure script so that fortran flag is set in config.h.
1472 * Updated Installation and Porting Guide, C++ Interface Guide, F77 and F90
1475 * Build with static libraries by default.
1477 * Added configure option --enable-separate-fortran, which causes the
1478 fortran library to be built separately. This is turned on automatically
1479 for shared libraries.
1481 * Improved clarity of error messages.
1483 * Changed configuration to get cygwin DLL and mingw DLL builds working,
1484 for the C library only (i.e. no F77, F90, or C++ APIs).
1486 * Changed type of ncbyte in C++ interface from unsigned char to signed
1487 char, for consistency with C interface. The C++ documentation warned
1488 this change would eventually occur.
1490 * Changed the C++ interface to use only the netCDF-3 C interface instead
1491 of the older netCDF-2 C interface. This has the added benefit that
1492 on-the-fly numeric conversions are now supported using get methods, for
1493 example you can get data of any type as double. When using --disable-v2
1494 flag to configure, the C++ interface can now be built and installed.
1496 ### 3.6.2 beta3 2006-05-24
1498 * Changed to use default prefix of /usr/local instead of package-based
1499 prefix of previous releases of netCDF. Use the --prefix argument to the
1500 configure script to override the default.
1502 * Made separate fortran library file, instead of appending fortran library
1503 functions to the C library file, if --enable-separate-fortran is used
1504 during configure (it's turned on automatically if --enable-shared is
1505 used). If uses, the fortran API users must link to *both* the C library
1506 and the new fortran library, like this: -lnetcdff -lnetcdf
1508 * Added netCDF examples in C, C++, F77, F90, and CDL. See the examples
1511 * Added the NetCDF Tutorial.
1513 * Minor fixes to some of the netCDF documentation.
1515 * Made it possible to build without V2 API using --disable-v2 from
1518 * Switched to new build system, with automake and libtool. Now shared
1519 libraries are built (as well as static ones) on platforms which support
1520 it. For more information about shared libraries, see
1521 http://www.unidata.ucar.edu/software/netcdf/docs/faq.html#shared_intro
1523 * Fixed ncdump crash that happened when no arguments were used.
1525 * Fixed for building with gfortran 4.1.0.
1527 * Important fix for machines whose SIZEOF\_SIZE\_T != SIZEOF\_LONG, such
1528 as NEC-SX, thanks to Stephen Leak.
1530 * Fixed C++ on AIX platform.
1532 * Fixed 64-bit builds on AIX platform.
1534 * Removed bad assertion that could be triggered in rare cases when reading
1537 * Added comments in v1hpg.c to clarify purpose of each internal function.
1539 * Make sure filesize is determined in nc\_close() *after* buffers get
1542 * Fix long-standing problem resulting in files up to 3 bytes longer than
1543 necessary if there is exactly one record variable of type byte, char, or
1544 short and if the number of values per record for that variable is not
1545 divisible by 4 (or 2 in the case of short). Now the filesize determined
1546 from header info by NC\_calcsize should be correct in all cases.
1550 * Updated installation manual for 3.6.1.
1552 * Changed installation to try to provide correct compiler flags for
1553 compiling in 64-bit mode on Sun, Irix, AIX, and HPUX. (HPUX doesn't work
1554 for me, however). Now run configure with --enable-64bit to get a 64 bit
1557 * Fixed long-standing bug that would cause small netCDF files to be padded
1558 on the end with zero bytes to 4096 bytes when they were opened and
1559 changed. Now small files should stay small after you change a value.
1561 * Fixed bug in assertions in putget.c that would only be noticed if you
1562 change the manifest constant NC\_MAX\_DIMS in netcdf.h to be different
1563 from NC\_MAX\_VAR\_DIMS.
1565 * Moved test ftest.F from fortran to nf\_test directory, and fixed bug in
1566 ftest.F which caused it to return 0 even if tests failed (no tests were
1567 failing, however). Also renamed some test output files to make things a
1570 * If open for writing, pad with up to 3 extra zero bytes before close to
1571 the correct canonical length, calculated from the header. Previously
1572 files could be short due to not padding when writing in NOFILL mode.
1574 * Doubled arbitrary limits on number of dimensions, variables, attributes,
1575 and length of names.
1577 * Change name of nc\_get\_format() to nc\_inq\_format(). Add analogous
1578 interfaces for nf\_inq\_format(), nf90\_inquire(), and
1579 NcFile::get\_format() to f77, f90, and C++ interfaces. Document new
1580 function in texinfo files. Add minimal test to nc\_test, nf\_test.
1582 ### 3.6.1-beta3 2005-02-17
1584 * Added function nc\_get\_format(int ncid, int\* formatp) that returns
1585 either NC\_FORMAT\_CLASSIC or NC\_FORMAT\_64BIT for a CDF1 or CDF2 file,
1588 * Added test to nc\_test that detects whether format version was changed
1589 after a file is reopened and define mode is entered.
1591 * Correctly configure for Intel ifort Fortran compiler on Linux.
1593 ### 3.6.0-p1 2005-02-18
1595 * Fixed bug that changes CDF2 files to CDF1 files if CDF2 file is reopened
1596 for write access and either an attribute is changed or define mode is
1599 ### 3.6.1-beta2 2005-1-6
1601 * Fixed absoft compile problem. Maybe.
1603 ### 3.6.1-beta1 2005-1-3
1605 * Fixed Cygwin C++ problem.
1607 * Fixed large file problem in MS Visual C++.NET environment.
1609 * More information in installation and porting guide.
1613 * Added texinfo source for the documentation.
1615 * Added large file tests to Windows directory in distribution.
1617 * Modified win32 visual studio project files so that m4 is no longer
1618 required to build netcdf under visual studio.
1620 * Modified rules.make to use install instead of cp, fixing install problem
1623 * Modified configure/install stuff to support HP-UX.
1625 * Modified configure/install stuff to support G95.
1627 * In the f90 interface, applied Arnaud Desitter's fixes to correct
1628 mismatches between scalar and array arguments, eliminating (legitimate)
1629 complaints by the NAGWare f95 compiler. Also fixed bugs introduced in
1630 3.6.0-beta5 in the mapped array interfaces.
1632 ### 3.6.0-beta6 2004-10-05
1634 * Fixed AIX 64-bit/largefile install problems.
1636 * Removed FAQ section from netcdf.texi User's Guide, in deference to
1637 online version that can be kept up to date more easily.
1639 ### 3.6.0-beta5 2004-10-04
1641 * Fixed assertion violation on 64-bit platforms when size of last fixed
1642 size variable exceeds 2\^32 - 1.
1644 * Removed another restriction on file size by making record size (derived
1645 from other sizes, not part of the format) an off\_t instead of a
1646 size\_t, when an off\_t is larger than a size\_t. This permits records
1647 to be *much* larger in either classic format or 64-bit-offset format.
1649 * Incorporated patch from Mathis Rosenhauer to improve performance of
1650 Fortran 90 interface for calls to nf90\_put\_var\_TYPE(),
1651 nf90\_get\_var\_TYPE(), nf90\_put\_vara\_TYPE(), and
1652 nf90\_get\_vara\_TYPE() functions by not emulating them with the
1653 corresponding nf90\_put\_varm\_TYPE() and nf90\_get\_varm\_TYPE() calls.
1655 * Added tests for invalid offsets in classic format when defining multiple
1658 * Improved installation ease. Have configure script use Large File Support
1659 as a default, if available.
1661 * Add "extra\_test" as a target for testing Large File Support.
1663 ### 3.6.0-beta3 2004-08-24
1665 * Upgraded to recent autoconf, changed configure to (hopefully) improve
1666 installation. Also added macros to deal with large file systems.
1668 * Added nf\_set\_default\_format to Fortran interface.
1670 * Added testing to the set\_default\_format functions to nc\_test and
1673 * Added documentation to the man page for set\_default\_format functions.
1675 * Added two new error return codes to C, f77, and f90 interfaces for
1676 invalid dimension size and for bad variable size. Made test for max
1677 dimension size depend on whether 64-bit offsets used. Fixed bug with
1678 dimension sizes between 2\^31 and 2\^32 (for byte variables).
1680 * Fixed ncdump to properly print dimensions larger than 2\^31.
1682 * Fixed ncgen to properly handle dimensions between 2\^31 and 2\^32.
1686 * Added -v2 (version 2 format with 64-bit offsets) option to
1687 ncgen, to specify that generated files or generated C/Fortran code
1688 should create 64-bit offset files. Also added -x option to ncgen to
1689 specify use of no-fill mode for fast creation of large files.
1691 * Added function to set default create mode to C interface
1692 (nc\_set\_default\_create).
1694 * Added win32 directory, with NET subdirectory to hold .NET port of
1695 netCDF. To use, open netcdf.sln with Visual Studio, and do a clean and
1696 then a build of either the debug or release builds. Tests will be run as
1697 part of the build process. VC++ with managed extensions is required
1700 * Added windows installer files to build windows binary installs.
1704 * By incorporating Greg Sjaardema's patch, added support for
1705 64-bit offset files, which remove many of the restrictions relating to
1706 very large files (i.e. larger than 2 GB.) This introduces a new data
1707 format for the first time since the original netCDF format was
1708 introduced. Files in this new 64-bit offset format can't be read by
1709 earlier versions of netCDF. Users should continue to use the netCDF
1710 classic format unless they need to create very large files.
1712 * The test suite, nc\_test, will now be run twice, once for netCDF classic
1713 format testing, and once for 64-bit offset format testing.
1715 * The implementation of the Fortran-77 interface has been adapted to
1716 version 4.3 of Burkhard Burow's "cfortran.h".
1720 * Added NEC SX specific optimization for NFILL tunable
1721 parameter in libsrc/putget.c
1723 Added support for the ifc Fortran-90 compiler creating files "netcdf.d"
1724 and "typesizes.d" (instead of ".mod" files).
1726 * Fixed access to iargc and getarg functions from Fortran-90 for NAG f90
1727 compiler, contributed by Harald Anlauf.
1731 * Updated INSTALL.html for Mac OS X (Darwin).
1733 * Made the installation of the netCDF Fortran-90 module file more robust
1734 regarding the name of the file.
1736 * Added support for eight-byte integers in Fortran90 interface.
1738 * Increased advisory limits in C netcdf.h and Fortran netcdf.inc for
1739 maximum number of dimensions, variables, and attributes.
1741 * Changed C++ declarations "friend NcFile" to "friend class NcFile" in
1742 cxx/netcdfcpp.h to conform to standard.
1744 * Added Dan Schmitt's backward compatible extension to the C++ record
1745 interface to work with arbitrary dimension slices.
1747 * Added C++ documentation note that caller is responsible for deleting
1748 pointer returned by Variable::values() method when no longer needed.
1750 * Made C++ interface more standard; the result may not compile on some old
1751 pre-standard C++ compilers.
1753 * Fixed bug in ncgen when parsing values of a multidimensional char
1754 variable that resulted in failure to pad a value with nulls on IRIX.
1756 * Fixed ncdump bug adding extra quote to char variable data when using -fc
1759 * Fixed so compiling with -DNO\_NETCDF\_2 will work for building without
1760 backward-compatibility netCDF-2 interfaces.
1762 * Eliminated use of ftruncate(), because it fails on FAT32 file systems
1765 * Initialized a pointer in putget.m4 (used to generate putget.c) that was
1766 involved in uninitialized memory references when nc\_test is run under
1767 Purify. Two users had reported seeing crashes resulting from this
1768 problem in their applications.
1770 * Reverted pointer initializations in putget.m4, after testing revealed
1771 these caused a performance problem, resulting in many extra calls to
1772 px\_pgin and px\_pgout when running nc\_test.
1774 * Added checking of size of "dimids" vector in function
1775 nf90\_inquire\_variable(...) and error-returning if it isn't
1776 sufficiently capacious.
1778 * Added variable index to ncvarget() and ncattinq() error messages and
1779 attribute name to ncattinq() error message.
1781 * Tweaked configure script to work with recent C++ compilers.
1783 * Fixed a memory leak in C++ interface, making sure NcVar::cur\_rec[] gets
1784 deleted in NcVar destructor.
1786 * Reimplemented nc\_sync() fix of version 3.5.0 to eliminate performance
1787 penalty when synchronization is unnecessary.
1789 * Changed order of targets in Makefile to build Fortran interface last, as
1790 a workaround for problem with make on AIX platforms.
1794 * Added Fortran 90 interface.
1796 * Changed C macro TIMELEN in file cxx/nctst.cpp to TIMESTRINGLEN to avoid
1797 clash with macro defined on AIX systems in /usr/include/time.h.
1799 * Fixed miswriting of netCDF header when exiting define mode. Because the
1800 header was always written correctly later, this was only a problem if
1801 there was another reader of the netCDF file.
1803 * Fixed explicit synchronizing between netCDF writer and readers via the
1804 nc\_sync(), nf\_sync(), and ncsync() functions.
1806 * Fixed a number of bugs related to attempts to support shrinking the
1807 header in netCDF files when attributes are rewritten or deleted. Also
1808 fixed the problem that nc\_\_endef() did not work as intended in
1809 reserving extra space in the file header, since the extra space would be
1810 compacted again on calling nc\_close().
1812 * Fixed the "redef bug" that occurred when nc\_enddef() or nf\_enddef() is
1813 called after nc\_redef() or nf\_redef(), the file is growing such that
1814 the new beginning of a record variable is in the next "chunk", and the
1815 size of at least one record variable exceeds the chunk size (see
1816 netcdf.3 man page for a description of this tuning parameter and how to
1817 set it). This bug resulted in corruption of some values in other
1818 variables than the one being added.
1820 * The "\*\*" tuning functions for the Fortran interface, nf\*\*create,
1821 nf\*\*open, and nf\*\*enddef, are now documented in the Fortran interface
1824 * Add an 'uninstall' target to all the Makefiles. Dave Glowacki
1825 <dglo@SSEC.WISC.EDU> 199810011851.MAA27335
1827 * Added support for multiprocessing on Cray T3E. Hooks added by Glenn, but
1828 the majority of the work was done at NERSC. Also includes changes to
1829 ffio option specification. Patch rollup provided by R. K. Owen
1830 <rkowen@Nersc.GOV>. The following functions are added to the public
1831 interface. nc**create\_mp() nc**open\_mp() nc\_set\_base\_pe()
1834 * Fixed makefile URL for Win32 systems in INSTALL file.
1836 * Made test for UNICOS system in the configure script case independent.
1838 * Ported to the following systems: AIX 4.3 (both /bin/xlc and
1839 /usr/vac/bin/xlc compilers) IRIX 6.5 IRIX64 6.5
1841 * Changed the extension of C++ files from ".cc" to ".cpp". Renamed the C++
1842 interface header file "netcdfcpp.h" instead of "netcdf.hh", changing
1843 "netcdf.hh" to include "netcdfcpp.h" for backward compatibility.
1845 * Treat "FreeBSD" systems the same as "BSD/OS" system w.r.t. Fortran and
1848 * Corrected manual pages: corrected spelling of "enddef" (was "endef") and
1849 ensured that the words "index" and "format" will be correctly printed.
1851 * Updated support for Fortran-calling-C interface by updating
1852 "fortran/cfortran.h" from version 3.9 to version 4.1. This new version
1853 supports the Portland Group Fortran compiler (C macro "pgiFortran") and
1854 the Absoft Pro Fortran compiler (C macro "AbsoftProFortran").
1856 * Corrected use of non-integral-constant-expression in specifying size of
1857 temporary arrays in file "libsrc/ncx\_cray.c".
1859 * Added Compaq Alpha Linux workstation example to INSTALL file.
1861 * Ported cfortran.h to Cygnus GNU Win32 C compiler (gcc for Windows).
1863 * Fixed bug in ncdump using same CDL header name when called with multiple
1866 * Added new NULL data type NC\_NAT (Not A Type) to facilitate checking
1867 whether a variable object has had its type defined yet, for example when
1868 working with packed values.
1870 * Fixed use of compile-time macro NO\_NETCDF\_2 so it really doesn't
1871 include old netCDF-2 interfaces, as intended.
1873 * Ported to MacOS X Public Beta (Darwin 1.2/PowerPC).
1875 * Fixed C++ friend declarations to conform to C++ standard.
1877 * Changed INSTALL file to INSTALL.html instead.
1881 * Fixed ncx\_cray.c to work on all CRAY systems, not just CRAY1. Reworked
1882 USE\_IEG, which was incorrect. Reworked short support. Now USE\_IEG and
1883 otherwise both pass t\_ncx.
1885 * To better support parallel systems, static and malloc'ed scratch areas
1886 which were shared in the library were eliminated. These were made
1887 private and on the stack where possible. To support this, the macros
1888 ALLOC\_ONSTACK and FREE\_ONSTACK are defined in onstack.h.
1890 * The buffered i/o system implementation in posixio.c was reimplemented to
1891 limit the number and size of read() or write() system calls and use
1892 greater reliance on memory to memory copy. This saves a great deal of
1893 wall clock time on slow (NFS) filesystems, especially during
1896 * Added performance tuning "underbar underbar" interfaces nc**open(),
1897 nc**create(), and nc\_\_enddef().
1899 * The 'sizehint' contract between the higher layers and the ncio layer is
1900 consistently enforced.
1902 * The C++ interface has been updated so that the deprecated "nclong"
1903 typedef should no longer be required, and casts to nclong no longer
1904 necessary. Just use int or long as appropriate. nclong is still
1905 supported for backwards compatibility.
1907 * The ncdump utility now displays byte values as signed, even on platforms
1908 where the type corresponding to a C char is unsigned (SGI, for example).
1909 Also the ncdump and ncgen utilities have been updated to display and
1910 accept byte attributes as signed numeric values (with a "b" suffix)
1911 instead of using character constants.
1913 * In libsrc/error.c:nc\_strerror(int), explain that NC\_EBADTYPE applies
1914 to "\_FillValue type mismatch".
1916 * Some changes to configure scripts (aclocal.m4), macros.make.in and
1917 ncgen/Makefile to support NEC SUPER-UX 7.2.
1919 * The "usage" messages of ncgen and ncdump include the string returned
1920 from nc\_inq\_libvers().
1922 * Corrected some casts in the library so that all phases of the arithmetic
1923 computing file offsets occurs with "off\_t" type. This allows certain
1924 larger netcdf files to be created and read on systems with larger
1927 * In ncgen, multidimensional character variables are now padded to the
1928 length of last dimension, instead of just concatenating them. This
1929 restores an undocumented but convenient feature of ncgen under netCDF-2.
1930 Also, a syntax error is now reliably reported if the netcdf name is
1931 omitted in CDL input.
1933 * Fortran and C code generated by ncgen for netCDF components whose names
1934 contain "-" characters will now compile and run correctly instead of
1935 causing syntax errors.
1937 * The library allows "." characters in names as well as "\_" and "-"
1938 characters. A zero length name "" is explicitly not allowed. The ncgen
1939 utility will now permit "." characters in CDL names as well.
1941 * Memory leaks in the C++ interface NcVar::as\_\*() member functions and
1942 NcFile::add\_var() member function are fixed. The documentation was
1943 fixed where it indicated incorrectly that the library managed value
1944 blocks that the user is actually responsible for deleting.
1946 * he values of the version 2 Fortran error codes have been modified to
1947 make the version 2 Fortran interface more backward compatible at the
1950 * Added support for systems whose Fortran INTEGER*1 and INTEGER*2 types
1951 are equivalent to the C "long" type but whose C "int" and "long" types
1952 differ. An example of such a system is the NEC SX-4 with the "-ew"
1953 option to the f90 compiler (sheesh, what a system!).
1955 * Fixed Version 2 Fortran compatibility bug: NCVGTG, NCVGGC, NCVPTG, and
1956 NCVPGC didn't work according to the Version 2 documentation if the
1957 innermost mapping value (i.e. IMAP[1]) was zero (indicating that the
1958 netCDF structure of the variable should be used).
1962 * One can now inquire about the number of attributes that a variable has
1963 using the global variable ID.
1965 * The FORTRAN interface should now work on more systems. In particular:
1967 * It should now work with FORTRAN compilers whose "integer*1" datatype is
1968 either a C "signed char", "short", or "int" and whose "integer*2"
1969 datatype is either a C "short" or "int".
1971 * It should now work with FORTRAN compilers that are extremely picky about
1972 source code formatting (e.g. the NAG f90 compiler).
1974 * The dependency on the non-POSIX utility m4(1) for generating the C and
1975 FORTRAN manual pages has been eliminated.
1977 * EXTERNAL statements have been added to the FORTRAN include-file
1978 "netcdf.inc" to eliminate excessive warnings about "unused" variables
1979 (which were actually functions) by some compilers (e.g. SunOS 4.1.3's
1980 f77(1) version 1.x).
1982 * Building the netCDF-3 package no longer requires the existence of the
1983 Standard C macro RAND\_MAX.
1985 * Fixed an ncdump bug resulting in ncdump reporting Attempt to convert
1986 between text & numbers when \_FillValue attribute of a character
1987 variable set to the empty string "".
1989 * Made ncgen tests more stringent and fixed various bugs this uncovered.
1990 These included bugs in handling byte attributes on platforms on which
1991 char is unsigned, initializing scalar character variables in generated C
1992 code under "-c" option, interspersing DATA statements with declaration
1993 statements in generated Fortran code under "-f" option, handling empty
1994 string as a value correctly in generated C and Fortran, and handling
1995 escape characters in strings. The Fortran output under the "-f" option
1996 was also made less obscure and more portable, using automatic conversion
1997 with netCDF-3 interfaces instead of "BYTE", "INTEGER*1", or "INTEGER*2"
2000 * Fixed a C++ interface problem that prevented compiling the C++ library
2001 with Digital's cxx compiler.
2003 * Made ncgen "make test" report failure and stop if test resulted in a
2004 failure of generated C or Fortran code.
2006 * The file that you are now reading was created to contain a high-level
2007 description of the evolution of the netCDF-3 package.
2011 * The production version of the netCDF-3 package was released.
2013 * A comparison of the netCDF-2 and netCDF-3 releases can be found in the