Conda-forge.github.io: CMake is finding GCC when building in Windows with `-G "Ninja"` in Azure Pipelines

[tadeu]

This recipe is building in AppVeyor, but is failing in Azure Pipelines (win64):

%SRC_DIR%>SET "CMAKE_GENERATOR=Visual Studio 14 2015 Win64"  

%SRC_DIR%>CALL "C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\Tools\..\..\VC\vcvarsall.bat" amd64  
-- The C compiler identification is GNU 8.1.0
-- The CXX compiler identification is GNU 8.1.0
-- Check for working C compiler: C:/ProgramData/chocolatey/bin/gcc.exe
-- Check for working C compiler: C:/ProgramData/chocolatey/bin/gcc.exe -- broken
CMake Error at D:/bld/cminpack_1550515875602/_build_env/Library/share/cmake-3.13/Modules/CMakeTestCCompiler.cmake:52 (message):
  The C compiler

    "C:/ProgramData/chocolatey/bin/gcc.exe"

  is not able to compile a simple test program.

[scopatz]

Azure cmake windows builds are a known failure right now

[thewtex]

Here is how we address this for ITK:

https://github.com/InsightSoftwareConsortium/ITK/blob/54cec2ae1bf5c7fcdf36804b7f6417d7d0f2a943/Testing/ContinuousIntegration/AzurePipelinesWindows.yml#L38-L41

https://github.com/InsightSoftwareConsortium/ITK/blob/54cec2ae1bf5c7fcdf36804b7f6417d7d0f2a943/Testing/ContinuousIntegration/AzurePipelinesWindows.yml#L45-L46

HTH

[tadeu]

Interesting, but AFAIK, conda build should already call the correct vcvars script :/

[scopatz]

CC @mariusvniekerk

[tadeu]

related https://github.com/conda-forge/staged-recipes/issues/7715

[thewtex]

In addition to sourcing vcvars, the compiler should be explicitly specified for CMake. This is possible with -DCMAKE_CXX_COMPILER=cl.exe and -DCMAKE_C_COMPILER=cl.exe or setting the standard environmental variables CC=cl.exe, CXX=cl.exe.

[jakirkham]

Is this issue still live? Any examples of current problems? If not, maybe we should close it out. Thoughts? 🙂

[tadeu]

The issue seems fixed (probably on Azure side), I've temporarily changed the recipe with the original problem to use Ninja again, and it is working! Feel free to close it.

[jakirkham]

Ok good to know. Thanks for the update.