git.maemo.org Git - keepassx/blob - cmake/FindPCHSupport.cmake

   1 # - Try to find precompiled headers support for GCC 3.4 and 4.x
   2 # Once done this will define:
   3 #
   4 # Variable:
   5 #   PCHSupport_FOUND
   6 #
   7 # Macro:
   8 #   ADD_PRECOMPILED_HEADER
   9
  10 IF(CMAKE_COMPILER_IS_GNUCXX)
  11     EXEC_PROGRAM(
  12         ${CMAKE_CXX_COMPILER}
  13         ARGS                    --version
  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)
  26
  27 MACRO(ADD_PRECOMPILED_HEADER _targetName _input )
  28
  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}})
  36
  37     GET_DIRECTORY_PROPERTY(_directory_flags INCLUDE_DIRECTORIES)
  38     FOREACH(item ${_directory_flags})
  39     LIST(APPEND _compiler_FLAGS "-I${item}")
  40     ENDFOREACH(item)
  41
  42         GET_DIRECTORY_PROPERTY(_directory_flags COMPILE_DEFINITIONS)
  43         FOREACH(item ${_directory_flags})
  44     LIST(APPEND _compiler_FLAGS "-D${item}")
  45     ENDFOREACH(item)
  46
  47     SEPARATE_ARGUMENTS(_compiler_FLAGS)
  48     #MESSAGE("_compiler_FLAGS: ${_compiler_FLAGS}")
  49     message("${CMAKE_CXX_COMPILER} ${_compiler_FLAGS} -x c++-header -o ${_output} ${_source}")
  50     ADD_CUSTOM_COMMAND(
  51         OUTPUT ${_output}
  52         COMMAND ${CMAKE_CXX_COMPILER}
  53                                 ${_compiler_FLAGS}
  54                                 -x c++-header
  55                                 -o ${_output} ${_source}
  56         DEPENDS ${_source} )
  57         ADD_CUSTOM_TARGET(${_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"
  63     )
  64
  65 ENDMACRO(ADD_PRECOMPILED_HEADER)