smarter MY_CHECK_AND_SET_COMPILER_FLAG

If a flag is supported only for C or C++ - add it to the corresponding compiler option list. Old behavior was to add always to both, but only if supported in both.

Author: vuvova

cmake/check_compiler_flag.cmake

@@ -37,16 +37,16 @@ FUNCTION(MY_CHECK_AND_SET_COMPILER_FLAG flag)
  ENDIF()
  MY_CHECK_C_COMPILER_FLAG(${flag} HAVE_C_${flag})
  MY_CHECK_CXX_COMPILER_FLAG(${flag} HAVE_CXX_${flag})
- IF (HAVE_C_${flag} AND HAVE_CXX_${flag})
- IF(ARGN)
- FOREACH(type ${ARGN})
- SET(CMAKE_C_FLAGS_${type} "${CMAKE_C_FLAGS_${type}} ${flag}" PARENT_SCOPE)
- SET(CMAKE_CXX_FLAGS_${type} "${CMAKE_CXX_FLAGS_${type}} ${flag}" PARENT_SCOPE)
- ENDFOREACH()
- ELSE()
- SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}" PARENT_SCOPE)
- SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}" PARENT_SCOPE)
+ FOREACH(lang C CXX)
+ IF (HAVE_${lang}_${flag})
+ IF(ARGN)
+ FOREACH(type ${ARGN})
+  SET(CMAKE_${lang}_FLAGS_${type} "${CMAKE_${lang}_FLAGS_${type}} ${flag}" PARENT_SCOPE)
+  ENDFOREACH()
+  ELSE()
+  SET(CMAKE_${lang}_FLAGS "${CMAKE_${lang}_FLAGS} ${flag}" PARENT_SCOPE)
+ ENDIF()
  ENDIF()
- ENDIF()
+ ENDFOREACH()
 ENDFUNCTION()