Description
The current way of installing from sources on Windows involves running the build_alllocal.cmd script which manually copies libz and libpng to the right location. Such approach doesn't work with e.g.,
pip install https://<some-url>/matplotlib.zip
where matplotlib.zip is the source distribution, taken e.g. from an open PR.
As far as I understand, on Linux this is solved by using pkg-config. On Windows, pkg-config can also be installed from the msys2 channel which is now parts of the default channel, as,
conda install m2w64-pkg-config
see conda-forge/pkg-config-feedstock#11 (comment)
This might help to detect the libpng/freetype libraries (I'm not fully sure), however in any case, install fails while linking libpng,
[...]
REQUIRED DEPENDENCIES AND EXTENSIONS
install_requires: yes [handled by setuptools]
freetype: yes [Using unknown version found on system.]
png: yes [Using unknown version found on system.]
[...]
C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\x86_amd64\link.exe /nologo /INCREMENTAL:NO /LTCG /DLL /MANIFEST:EMBED,ID=2 /MANIFESTUAC:NO /LIBPATH:C:\ProgramData\Miniconda3\envs\laserbeam-env\Library\lib /LIBPATH:C:\ProgramData\Miniconda3\envs\laserbeam-env\libs /LIBPATH:C:\ProgramData\Miniconda3\envs\laserbeam-env\PCbuild\amd64 "/LIBPATH:C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\LIB\amd64" "/LIBPATH:C:\Program Files (x86)\Windows Kits\10\lib\10.0.10240.0\ucrt\x64" "/LIBPATH:C:\Program Files (x86)\Windows Kits\8.1\lib\winv6.3\um\x64" png.lib z.lib /EXPORT:PyInit__png build\temp.win-amd64-3.7\Release\src/_png.obj build\temp.win-amd64-3.7\Release\src/mplutils.obj /OUT:build\lib.win-amd64-3.7\matplotlib\_png.cp37-win_amd64.pyd /IMPLIB:build\temp.win-amd64-3.7\Release\src\_png.cp37-win_amd64.lib
LINK : fatal error LNK1181: cannot open input file 'png.lib'
error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\BIN\\x86_amd64\\link.exe' failed with exit status 1181
See detailed_log.txt for more details (this builds the #11577 PR)
I'm wondering if this has anything to do with the fact that PkgConfig.has_pkgconfig is hardcoded to False in setupext.py when on Windows.
Opening this issue to track the usage of pkg-config on windows.
Versions
- Operating system: Windows Server 2016 Datacenter
- Matplotlib version: master branch
- Python version: 3.7
Related: #9693