[CMake] how do you allow CMAKE_CUDA_COMPILER to be optional via project LANGUAGE?

[Eric Noulard]

Le mar. 28 août 2018 à 19:07, Quang Ha <quang.t.ha.20 at gmail.com> a écrit :

> Hi all,
>
> So this question is again about project(foo LANGUAGES CXX CUDA). Is it
> possible to switch off CUDA if Cmake couldn't find CUDA compiler? I.e.
> something along the line:
>

May be you can only:

  project(foo LANGUAGES CXX)

then

include(CheckLanguage)
check_language(CUDA)
if(CMAKE_CUDA_COMPILER)
  enable_language(CUDA)
else()
  message(STATUS "No CUDA compiler found")
endif()

see doc:
https://cmake.org/cmake/help/latest/module/CheckLanguage.html


Eric


> if (CUDA_FOUND)
>   set_language_to_CUDA_and_CXX
> else(CUDA_FOUND)
>   set_language_to_CXX_only
> endif(CUDA_FOUND)
>
> The main reason is I don't want CMake to fail when CUDA compiler isn't
> available. Rather, it should continue to compile the source files using CPP
> compilers instead.
>
> Thanks,
> Quang
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-- 
Eric
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