diff options
Diffstat (limited to 'cmake')
| -rw-r--r-- | cmake/Modules/CheckLinkerFlag.cmake | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/cmake/Modules/CheckLinkerFlag.cmake b/cmake/Modules/CheckLinkerFlag.cmake new file mode 100644 index 000000000000..722fe5b1b8ea --- /dev/null +++ b/cmake/Modules/CheckLinkerFlag.cmake @@ -0,0 +1,17 @@ +include(CMakePushCheckState) +include(CheckCCompilerFlag) + +function(llvm_check_linker_flag flag dest) + # If testing a flag with check_c_compiler_flag, it gets added to the compile + # command only, but not to the linker command in that test. If the flag + # is vital for linking to succeed, the test would fail even if it would + # have succeeded if it was included on both commands. + # + # Therefore, try adding the flag to CMAKE_REQUIRED_FLAGS, which gets + # added to both compiling and linking commands in the tests. + + cmake_push_check_state() + set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${flag}") + check_c_compiler_flag("" ${dest}) + cmake_pop_check_state() +endfunction() |