Installing with custom g++ versions

[davidstutz]

Hi,

while installing the package I ran into the problem that the CUDA version used to install my torch installation (CUDA 9.2) is not compatible with recent g++ versions (7 or higher). The error looks something like this:

/usr/lib/cuda-9.2/include/crt/host_config.h:119:2: error: #error -- unsupported GNU version! gcc versions later than 7 are not supported!

So I just wanted to leave a comment that adapting setup.py as follows (also see https://github.com/davidstutz/torchsort/blob/d97f30233dc7b463899a9072b6a77cb7abade5c7/setup.py#L22) allows to set custom gcc/g++ versions for building:

os.environ['CC'] = '/usr/bin/gcc-7'
os.environ['CXX'] = '/usr/bin/g++-7'
os.environ['CCP'] = '/usr/bin/g++-7'

@lru_cache(None)
def cuda_toolkit_available():
    # https://github.com/idiap/fast-transformers/blob/master/setup.py
    try:
        call(["CC=/usr/bin/gcc-7 CXX=/usr/bin/g++-7 CCP=/usr/bin/g++-7 nvcc"], stdout=DEVNULL, stderr=DEVNULL)
        return True
    except FileNotFoundError:
        return False

Thanks for the package! David

[teddykoker]

Hi David,

Thanks for reporting this and providing a fix! Could this be addressed by exporting the CC, CXX and CCP variables on the command line prior to installing? Or does subprocess.call not use the same environment?

Just wondering if there would be a fix that could remain flexible enough for all users.

[teddykoker]

Closing due to lack of activity