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FindCUDA: Fix OSX Clang & no C language enabled 

When setting default CUDA_HOST_COMPILER we must dereference CMAKE_C_COMPILER,
i.e. /usr/bin/clang should be used instead /usr/bin/cc which is symlink.
Otherwise CUDA thinks it is GCC and issues -dumpspecs which is unknown 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.
This commit is contained in:
Adam Strzelecki 2014-06-12 19:46:50 +02:00 committed by Robert Maynard
parent bf5fc1d582
commit 32bcec5fab
2 changed files with 14 additions and 4 deletions
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14
Modules/FindCUDA.cmake
View File

@ -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}

4
Modules/FindCUDA/run_nvcc.cmake
View File

@ -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()