CMake cannot verify NVCC compiler after rerender to 2019 Windows Image

[carterbox]

• I read the conda-forge documentation and could not find the solution for my problem there.

Issue:
After a feedstock was re-rendered to the 2019 Windows image, CMake can no longer verify NVCC as a working compiler. The version of the nvcc_win-64 is the same before and after the rerender. At first, I thought the problem was that the wrong host compiler was being assigned to NVCC because the version of the compiler linked to %CXX% did not match the host compiler reported by CMake, but then I also tried manually assigning NVCC and host compiler paths.

I really don't know what's going on.

Environment (conda list):

    cmake:          3.21.3-h39d44d4_0       conda-forge
    ninja:          1.10.2-h2d74725_1       conda-forge
    nvcc_win-64:    11.2-h929061a_15        conda-forge
    ucrt:           10.0.20348.0-h57928b3_0 conda-forge
    vc:             14.2-hb210afc_5         conda-forge
    vs2015_runtime: 14.29.30037-h902a5da_5  conda-forge
    vs2017_win-64:  19.16.27038-h2e3bad8_2  conda-forge
    vswhere:        2.8.4-h57928b3_0        conda-forge

Details about conda and system ( conda info ):

$ conda info

[leofang]

cc: @jaimergp for vis

[leofang]

Looks like we have a growing number of people hitting this issue:

'cl.exe' is not recognized as an internal or external command,
operable program or batch file.

• MNT: Re-rendered with conda-build 3.21.4, conda-smithy 3.16.0, and co… libastra-feedstock#7 (@carterbox)
• support cuda pyvkfft-feedstock#4 (@isuruf)
• Arch Migrator cupy-feedstock#173 (@leofang)

Sounds like vs2019 is to blame?

cc: @conda-forge/core @conda-forge/nvcc @conda-forge/cudatoolkit

[leofang]

I figured it out. We need to set --use-local-env flag to nvcc. Let me send a patch.

[leofang]

#88 (comment)

[hadim]

I am not sure what is the status here but also got the cl.exe error at conda-forge/katago-feedstock#1 and when trying to use your fix:

    set CUDNN_INCLUDE_DIR=%LIBRARY_PREFIX%\include
    for /f "tokens=* usebackq" %%f in (`where nvcc`) do (set "dummy=%%f" && call set "NVCC=%%dummy:\=\\%%")
    set "NVCC=%NVCC% --use-local-env"
    echo "nvcc is %NVCC%, CUDA path is %CUDA_PATH%"

then I got a Failed to find nvcc. error.

Any idea?

[leofang]

No, unfortunately. I don't really know what's going on. The patch #88 did not work...

[jaimergp]

Isuru's patch did work in this other PR, so I don't know :(

[leofang]

Interesting, @isuruf have you figured out what's missing in #88?