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CUDA: Store CMAKE_CUDA_HOST_COMPILER as an absolute path

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Isolate its selection from later changes to `PATH`.

Fixes: #26942
Co-authored-by: Brad King <brad.king@kitware.com>
This commit is contained in:
Robert Maynard
2025-05-19 11:20:02 -04:00
committed by Brad King
parent 85cd454c91
commit fdb8f0f588
1 changed files with 23 additions and 0 deletions
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23
Modules/CMakeDetermineCUDACompiler.cmake
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@@ -49,6 +49,29 @@ else()
if(NOT EXISTS ${CMAKE_CUDA_HOST_COMPILER})
message(FATAL_ERROR "Could not find compiler set in environment variable CUDAHOSTCXX:\n$ENV{CUDAHOSTCXX}.\n${CMAKE_CUDA_HOST_COMPILER}")
endif()
elseif(CMAKE_CUDA_HOST_COMPILER)
# We get here if CMAKE_CUDA_HOST_COMPILER was specified by the user or toolchain file.
if(IS_ABSOLUTE "${CMAKE_CUDA_HOST_COMPILER}")
# Convert to forward slashes.
cmake_path(CONVERT "${CMAKE_CUDA_HOST_COMPILER}" TO_CMAKE_PATH_LIST CMAKE_CUDA_HOST_COMPILER NORMALIZE)
else()
# Convert to absolute path so changes in `PATH` do not impact CUDA compilation.
find_program(_CMAKE_CUDA_HOST_COMPILER_PATH NO_CACHE NAMES "${CMAKE_CUDA_HOST_COMPILER}")
if(_CMAKE_CUDA_HOST_COMPILER_PATH)
set(CMAKE_CUDA_HOST_COMPILER "${_CMAKE_CUDA_HOST_COMPILER_PATH}")
endif()
unset(_CMAKE_CUDA_HOST_COMPILER_PATH)
endif()
if(NOT EXISTS "${CMAKE_CUDA_HOST_COMPILER}")
message(FATAL_ERROR "Could not find compiler set in variable CMAKE_CUDA_HOST_COMPILER:\n ${CMAKE_CUDA_HOST_COMPILER}")
endif()
# If the value was cached, update the cache entry with our modifications.
get_property(_CMAKE_CUDA_HOST_COMPILER_CACHED CACHE CMAKE_CUDA_HOST_COMPILER PROPERTY TYPE)
if(_CMAKE_CUDA_HOST_COMPILER_CACHED)
set_property(CACHE CMAKE_CUDA_HOST_COMPILER PROPERTY VALUE "${CMAKE_CUDA_HOST_COMPILER}")
mark_as_advanced(CMAKE_CUDA_HOST_COMPILER)
endif()
unset(_CMAKE_CUDA_HOST_COMPILER_CACHED)
endif()
endif()