Enable ppc64le

[xylar]

This should be possible now that support for ppc64le has been re-enabled for libgdal
conda-forge/gdal-feedstock#968

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe/meta.yaml) and found it was in an excellent condition.

[xylar]

@conda-forge-admin, please rerender

[xylar]

Hmm, seeing:

-- Check for working CXX compiler: $BUILD_PREFIX/bin/x86_64-conda-linux-gnu-c++
-- Check for working CXX compiler: $BUILD_PREFIX/bin/x86_64-conda-linux-gnu-c++ - broken
CMake Error at /home/conda/feedstock_root/build_artifacts/libpdal-core_1722406127865/_build_env/share/cmake-3.30/Modules/CMakeTestCXXCompiler.cmake:73 (message):
  The C++ compiler

    "/home/conda/feedstock_root/build_artifacts/libpdal-core_1722406127865/_build_env/bin/x86_64-conda-linux-gnu-c++"

  is not able to compile a simple test program.

  It fails with the following output:

    Change Dir: '/home/conda/feedstock_root/build_artifacts/libpdal-core_1722406127865/work/native/CMakeFiles/CMakeScratch/TryCompile-sWZhBa'
    
    Run Build Command(s): /home/conda/feedstock_root/build_artifacts/libpdal-core_1722406127865/_build_env/bin/ninja -v cmTC_fabad
    [1/2] /home/conda/feedstock_root/build_artifacts/libpdal-core_1722406127865/_build_env/bin/x86_64-conda-linux-gnu-c++   -fvisibility-inlines-hidden -fmessage-length=0 -mcpu=power8 -mtune=power8 -ftree-vectorize -fPIC -fstack-protector-strong -fno-plt -O3 -pipe -isystem /home/conda/feedstock_root/build_artifacts/libpdal-core_1722406127865/_build_env/include -fdebug-prefix-map=/home/conda/feedstock_root/build_artifacts/libpdal-core_1722406127865/work=/usr/local/src/conda/libpdal-core-2.7.2 -fdebug-prefix-map=/home/conda/feedstock_root/build_artifacts/libpdal-core_1722406127865/_build_env=/usr/local/src/conda-prefix -D_LIBCPP_DISABLE_AVAILABILITY -o CMakeFiles/cmTC_fabad.dir/testCXXCompiler.cxx.o -c /home/conda/feedstock_root/build_artifacts/libpdal-core_1722406127865/work/native/CMakeFiles/CMakeScratch/TryCompile-sWZhBa/testCXXCompiler.cxx
    FAILED: CMakeFiles/cmTC_fabad.dir/testCXXCompiler.cxx.o 
    /home/conda/feedstock_root/build_artifacts/libpdal-core_1722406127865/_build_env/bin/x86_64-conda-linux-gnu-c++   -fvisibility-inlines-hidden -fmessage-length=0 -mcpu=power8 -mtune=power8 -ftree-vectorize -fPIC -fstack-protector-strong -fno-plt -O3 -pipe -isystem /home/conda/feedstock_root/build_artifacts/libpdal-core_1722406127865/_build_env/include -fdebug-prefix-map=/home/conda/feedstock_root/build_artifacts/libpdal-core_1722406127865/work=/usr/local/src/conda/libpdal-core-2.7.2 -fdebug-prefix-map=/home/conda/feedstock_root/build_artifacts/libpdal-core_1722406127865/_build_env=/usr/local/src/conda-prefix -D_LIBCPP_DISABLE_AVAILABILITY -o CMakeFiles/cmTC_fabad.dir/testCXXCompiler.cxx.o -c /home/conda/feedstock_root/build_artifacts/libpdal-core_1722406127865/work/native/CMakeFiles/CMakeScratch/TryCompile-sWZhBa/testCXXCompiler.cxx
    cc1plus: error: bad value 'power8' for '-mtune=' switch
    cc1plus: note: valid arguments to '-mtune=' switch are: nocona core2 nehalem corei7 westmere sandybridge corei7-avx ivybridge core-avx-i haswell core-avx2 broadwell skylake skylake-avx512 cannonlake icelake-client rocketlake icelake-server cascadelake tigerlake cooperlake sapphirerapids alderlake bonnell atom silvermont slm goldmont goldmont-plus tremont knl knm intel x86-64 eden-x2 nano nano-1000 nano-2000 nano-3000 nano-x2 eden-x4 nano-x4 k8 k8-sse3 opteron opteron-sse3 athlon64 athlon64-sse3 athlon-fx amdfam10 barcelona bdver1 bdver2 bdver3 bdver4 znver1 znver2 znver3 znver4 btver1 btver2 generic native
    ninja: build stopped: subcommand failed.
    
    

  

  CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
  CMakeLists.txt:8 (project)

@hobu, do you recall if that is what you saw in conda-forge/pdal-feedstock#251, which led you to disable ppc64le or if it was an upstream dependency (libgdal, most likely)?

[xylar]

@conda-forge-admin, please rerender

[xylar]

The easiest solution for now is probably not to cross-compile ppc64le. It seems a few other feedstocks are seeing this problem:
conda-forge/tensorstore-feedstock#34
conda-forge/qt-main-feedstock#76
conda-forge/cargo-c-feedstock#10

It's an issue with the wrong compiler being used (see comment conda-forge/cargo-c-feedstock#10 (comment)) but tracking down why is beyond my skills.

[h-vetinari]

-- Check for working CXX compiler: $BUILD_PREFIX/bin/x86_64-conda-linux-gnu-c++
                                                     ^^^^^^

this is the wrong compiler, which sounds like a configuration issue, but I cannot see what happened before the force push.

[xylar]

@h-vetinari, the only thing that I took out in the force push was a previous rerender. The only change I have made since getting the error was the commit to switch to building natively rather than cross-compiling.

[xylar]

But understood, the link to the Azure build is gone and I don't see an easy way to find it.

[h-vetinari]

But understood, the link to the Azure build is gone and I don't see an easy way to find it.

Yeah, this is annoying. They should be kept at least for a day or so, even for cancelled builds. In any case, if you manage to make things work with native emulated compilation (which is going to be ~5-6x slower), then go for it. Just saying that the cross-compilation issues can probably be fixed.

[xylar]

@h-vetinari, if you're willing to have a look, I'll be happy to switch back.

[xylar]

@conda-forge-admin, please rerender

[xylar]

@h-vetinari, the logs are back if you care to take a look:
https://dev.azure.com/conda-forge/feedstock-builds/_build/results?buildId=991299&view=logs&jobId=8c139a40-380b-5518-bf6b-edcb18cbf319&j=8c139a40-380b-5518-bf6b-edcb18cbf319&t=e71f8d0d-13be-528e-b5e7-bfc20e0db699

[xylar]

@h-vetinari, awesome, thanks! 🤞🏻

[h-vetinari]

This is currently running into conda/conda-build#5403 due to

libpdal-feedstock/conda-forge.yml

Lines 5 to 6 in e940dd8

	conda_build:
	error_overlinking: true

You can either wait for the imminent conda-build 24.7 to be released, or add something like

    build:
      # due to https://github.com/conda/conda-build/issues/5403
      overlinking_ignore_patterns:  # [ppc64le]
        - "**"                      # [ppc64le]

[xylar]

Thanks @h-vetinari! I'm not a maintainer here so I'll leave it up to @hobu and @chambbj what you want to do. Feel free to push updates to my branch.

[hobu]

wait for the imminent conda-build 24.7 to be released,

We can wait

[hobu]

It looks like conda build 24.7.1 has been released, but I wonder if there will be a lag before that is integrated into conda-forge infrastructure? Or are we clear to merge this now?

[xylar]

Conda-forge seems to already be using 24.7.1. See this log from earlier today as an example:
https://dev.azure.com/conda-forge/84710dde-1620-425b-80d0-4cf5baca359d/_apis/build/builds/993156/logs/10

[xylar]

CI passed so I think you're good to go!

[xylar]

Thanks @hobu!