diff options
Diffstat (limited to 'cmake')
| -rw-r--r-- | cmake/navit_macros.cmake | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/cmake/navit_macros.cmake b/cmake/navit_macros.cmake index de5ecb2f4..dd1b3bb37 100644 --- a/cmake/navit_macros.cmake +++ b/cmake/navit_macros.cmake @@ -86,3 +86,20 @@ macro(message_error) set(NAVIT_DEPENDENCY_ERROR 1) message( SEND_ERROR ${ARGN}) endmacro(message_error) + +include(CheckCCompilerFlag) +include(CheckCXXCompilerFlag) +function(add_compiler_flag_if_available FLAG) + set(VAR_FLAG_AVAILABLE_C "FLAG_AVAILABLE_C_${FLAG}") + check_c_compiler_flag(${FLAG} ${VAR_FLAG_AVAILABLE_C}) + if (${${VAR_FLAG_AVAILABLE_C}}) + set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${FLAG} ") + endif() + if(CMAKE_CXX_COMPILER) # C++ compiler is optional + set(VAR_FLAG_AVAILABLE_CXX "FLAG_AVAILABLE_CXX_${FLAG}") + check_cxx_compiler_flag(${FLAG} ${VAR_FLAG_AVAILABLE_CXX}) + if (${${VAR_FLAG_AVAILABLE_CXX}}) + set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${FLAG} ") + endif() + endif() +endfunction(add_compiler_flag_if_available) |