diff --git a/Modules/FindCUDA.cmake b/Modules/FindCUDA.cmake index d9809ad2e..9348aa5c6 100644 --- a/Modules/FindCUDA.cmake +++ b/Modules/FindCUDA.cmake @@ -452,7 +452,17 @@ set(CUDA_NVCC_FLAGS "" CACHE STRING "Semi-colon delimit multiple arguments.") if(CMAKE_GENERATOR MATCHES "Visual Studio") set(CUDA_HOST_COMPILER "$(VCInstallDir)bin" CACHE FILEPATH "Host side compiler used by NVCC") else() - set(CUDA_HOST_COMPILER "${CMAKE_C_COMPILER}" CACHE FILEPATH "Host side compiler used by NVCC") + # Using cc which is symlink to clang may let NVCC think it is GCC and issue + # unhandled -dumpspecs option to clang. Also in case neither + # CMAKE_C_COMPILER is defined (project does not use C language) nor + # CUDA_HOST_COMPILER is specified manually we should skip -ccbin and let + # nvcc use its own default C compiler. + if(DEFINED CMAKE_C_COMPILER AND NOT DEFINED CUDA_HOST_COMPILER) + get_filename_component(c_compiler_realpath "${CMAKE_C_COMPILER}" REALPATH) + else() + set(c_compiler_realpath "") + endif() + set(CUDA_HOST_COMPILER "${c_compiler_realpath}" CACHE FILEPATH "Host side compiler used by NVCC") endif() # Propagate the host flags to the host compiler via -Xcompiler @@ -1422,7 +1432,7 @@ function(CUDA_LINK_SEPARABLE_COMPILATION_OBJECTS output_file cuda_target options # If -ccbin, --compiler-bindir has been specified, don't do anything. Otherwise add it here. list( FIND nvcc_flags "-ccbin" ccbin_found0 ) list( FIND nvcc_flags "--compiler-bindir" ccbin_found1 ) - if( ccbin_found0 LESS 0 AND ccbin_found1 LESS 0 ) + if( ccbin_found0 LESS 0 AND ccbin_found1 LESS 0 AND CUDA_HOST_COMPILER ) list(APPEND nvcc_flags -ccbin "\"${CUDA_HOST_COMPILER}\"") endif() # Create a list of flags specified by CUDA_NVCC_FLAGS_${CONFIG} diff --git a/Modules/FindCUDA/run_nvcc.cmake b/Modules/FindCUDA/run_nvcc.cmake index f0aac8487..58e0d312b 100644 --- a/Modules/FindCUDA/run_nvcc.cmake +++ b/Modules/FindCUDA/run_nvcc.cmake @@ -62,7 +62,7 @@ set(cmake_dependency_file "@cmake_dependency_file@") # path set(CUDA_make2cmake "@CUDA_make2cmake@") # path set(CUDA_parse_cubin "@CUDA_parse_cubin@") # path set(build_cubin @build_cubin@) # bool -set(CUDA_HOST_COMPILER "@CUDA_HOST_COMPILER@") # bool +set(CUDA_HOST_COMPILER "@CUDA_HOST_COMPILER@") # path # We won't actually use these variables for now, but we need to set this, in # order to force this file to be run again if it changes. set(generated_file_path "@generated_file_path@") # path @@ -106,7 +106,7 @@ list(APPEND CUDA_NVCC_FLAGS ${CUDA_NVCC_FLAGS_${build_configuration}}) # Any -ccbin existing in CUDA_NVCC_FLAGS gets highest priority list( FIND CUDA_NVCC_FLAGS "-ccbin" ccbin_found0 ) list( FIND CUDA_NVCC_FLAGS "--compiler-bindir" ccbin_found1 ) -if( ccbin_found0 LESS 0 AND ccbin_found1 LESS 0 ) +if( ccbin_found0 LESS 0 AND ccbin_found1 LESS 0 AND CUDA_HOST_COMPILER ) if (CUDA_HOST_COMPILER STREQUAL "$(VCInstallDir)bin" AND DEFINED CCBIN) set(CCBIN -ccbin "${CCBIN}") else()