1 # - Try to find precompiled headers support for GCC 3.4 and 4.x
2 # Once done this will define:
8 # ADD_PRECOMPILED_HEADER
10 IF(CMAKE_COMPILER_IS_GNUCXX)
14 OUTPUT_VARIABLE _compiler_output)
15 STRING(REGEX REPLACE ".* ([0-9]\\.[0-9]\\.[0-9]) .*" "\\1"
16 gcc_compiler_version ${_compiler_output})
17 #MESSAGE("GCC Version: ${gcc_compiler_version}")
18 IF(gcc_compiler_version MATCHES "4\\.[0-9]\\.[0-9]")
19 SET(PCHSupport_FOUND TRUE)
20 ELSE(gcc_compiler_version MATCHES "4\\.[0-9]\\.[0-9]")
21 IF(gcc_compiler_version MATCHES "3\\.4\\.[0-9]")
22 SET(PCHSupport_FOUND TRUE)
23 ENDIF(gcc_compiler_version MATCHES "3\\.4\\.[0-9]")
24 ENDIF(gcc_compiler_version MATCHES "4\\.[0-9]\\.[0-9]")
25 ENDIF(CMAKE_COMPILER_IS_GNUCXX)
27 MACRO(ADD_PRECOMPILED_HEADER _targetName _input )
29 GET_FILENAME_COMPONENT(_name ${_input} NAME)
30 SET(_source "${CMAKE_CURRENT_SOURCE_DIR}/${_input}")
31 SET(_outdir "${CMAKE_CURRENT_BINARY_DIR}/${_name}.gch")
32 MAKE_DIRECTORY(${_outdir})
33 SET(_output "${_outdir}/${CMAKE_BUILD_TYPE}.c++")
34 STRING(TOUPPER "CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}" _flags_var_name)
35 SET(_compiler_FLAGS ${${_flags_var_name}})
37 GET_DIRECTORY_PROPERTY(_directory_flags INCLUDE_DIRECTORIES)
38 FOREACH(item ${_directory_flags})
39 LIST(APPEND _compiler_FLAGS "-I${item}")
42 GET_DIRECTORY_PROPERTY(_directory_flags COMPILE_DEFINITIONS)
43 FOREACH(item ${_directory_flags})
44 LIST(APPEND _compiler_FLAGS "-D${item}")
47 SEPARATE_ARGUMENTS(_compiler_FLAGS)
48 #MESSAGE("_compiler_FLAGS: ${_compiler_FLAGS}")
49 message("${CMAKE_CXX_COMPILER} ${_compiler_FLAGS} -x c++-header -o ${_output} ${_source}")
52 COMMAND ${CMAKE_CXX_COMPILER}
55 -o ${_output} ${_source}
57 ADD_CUSTOM_TARGET(${_targetName}_gch DEPENDS ${_output})
58 ADD_DEPENDENCIES(${_targetName} ${_targetName}_gch)
59 #SET(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} "-include ${_name} -Winvalid-pch -H")
60 #SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -include ${_name} -Winvalid-pch")
61 SET_TARGET_PROPERTIES(${_targetName} PROPERTIES
62 COMPILE_FLAGS "-include ${_name} -Winvalid-pch"
65 ENDMACRO(ADD_PRECOMPILED_HEADER)