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convert linker choice to (advanced) choice. only for Clang and GNU at the moment

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Axel Kohlmeyer 2020-07-29 17:36:34 -04:00
parent 4d9781f9b6
commit 1f1767f5af
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GPG Key ID: D9B44E93BF0C375A
1 changed files with 23 additions and 8 deletions
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31
cmake/Modules/Testing.cmake
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@ -16,15 +16,30 @@ if(ENABLE_TESTING)
set(MEMORYCHECK_COMMAND "${VALGRIND_BINARY}" CACHE FILEPATH "Memory Check Command")
set(MEMORYCHECK_COMMAND_OPTIONS "${VALGRIND_DEFAULT_OPTIONS}" CACHE STRING "Memory Check Command Options")
# check if a faster linker is available
# check if a faster linker is available.
# only verified with GNU and Clang compilers and new CMake
if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.13)
include(CheckCXXCompilerFlag)
check_cxx_compiler_flag(-fuse-ld=lld HAVE_LLD_LINKER)
check_cxx_compiler_flag(-fuse-ld=gold HAVE_GOLD_LINKER)
if(HAVE_LLD_LINKER)
target_link_options(lammps PUBLIC -fuse-ld=lld)
elseif(HAVE_GOLD_LINKER)
target_link_options(lammps PUBLIC -fuse-ld=gold)
if((${CMAKE_CXX_COMPILER_ID} STREQUAL "GNU")
OR (${CMAKE_CXX_COMPILER_ID} STREQUAL "Clang"))
include(CheckCXXCompilerFlag)
set(CMAKE_CUSTOM_LINKER_DEFAULT default)
check_cxx_compiler_flag(-fuse-ld=lld HAVE_LLD_LINKER)
check_cxx_compiler_flag(-fuse-ld=gold HAVE_GOLD_LINKER)
check_cxx_compiler_flag(-fuse-ld=bfd HAVE_BFD_LINKER)
if(HAVE_LLD_LINKER)
set(CMAKE_CUSTOM_LINKER_DEFAULT lld)
elseif(HAVE_GOLD_LINKER)
set(CMAKE_CUSTOM_LINKER_DEFAULT gold)
elseif(HAVE_BFD_LINKER)
set(CMAKE_CUSTOM_LINKER_DEFAULT bfd)
endif()
set(CMAKE_CUSTOM_LINKER_VALUES lld gold bfd default)
set(CMAKE_CUSTOM_LINKER ${CMAKE_CUSTOM_LINKER_DEFAULT} CACHE STRING "Choose a custom linker for faster linking (lld, gold, bfd, default)")
validate_option(CMAKE_CUSTOM_LINKER CMAKE_CUSTOM_LINKER_VALUES)
mark_as_advanced(CMAKE_CUSTOM_LINKER)
if(NOT "${CMAKE_CUSTOM_LINKER}" STREQUAL "default")
target_link_options(lammps PUBLIC -fuse-ld=${CMAKE_CUSTOM_LINKER})
endif()
endif()
endif()