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-rw-r--r--cmake/check_linker_flag.cmake27
1 files changed, 27 insertions, 0 deletions
diff --git a/cmake/check_linker_flag.cmake b/cmake/check_linker_flag.cmake
new file mode 100644
index 00000000..1ea1772d
--- /dev/null
+++ b/cmake/check_linker_flag.cmake
@@ -0,0 +1,27 @@
+include(CheckCXXSourceCompiles)
+
+FUNCTION(MY_CHECK_AND_SET_LINKER_FLAG flag_to_set)
+ # Let's avoid expensive compiler tests on Windows:
+ IF(WIN32)
+ RETURN()
+ ENDIF()
+ STRING(REGEX REPLACE "[-,= +]" "_" result "HAVE_LINK_FLAG_${flag_to_set}")
+ SET(SAVE_CMAKE_REQUIRED_LIBRARIES "${CMAKE_REQUIRED_LIBRARIES}")
+ STRING(REGEX REPLACE "^-Wno-" "-W" flag_to_check ${flag_to_set})
+ SET(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} ${flag_to_check})
+ CHECK_CXX_SOURCE_COMPILES("int main(void) { return 0; }" ${result})
+ SET(CMAKE_REQUIRED_LIBRARIES "${SAVE_CMAKE_REQUIRED_LIBRARIES}")
+ IF (${result})
+ FOREACH(linktype SHARED MODULE EXE)
+ IF(ARGN)
+ FOREACH(type ${ARGN})
+ SET(CMAKE_${linktype}_LINKER_FLAGS_${type}
+ "${CMAKE_${linktype}_LINKER_FLAGS_${type}} ${flag_to_set}" PARENT_SCOPE)
+ ENDFOREACH()
+ ELSE()
+ SET(CMAKE_${linktype}_LINKER_FLAGS
+ "${CMAKE_${linktype}_LINKER_FLAGS} ${flag_to_set}" PARENT_SCOPE)
+ ENDIF()
+ ENDFOREACH()
+ ENDIF()
+ENDFUNCTION()