CMakeMacros.cmake

   1 MACRO(_PCH_GET_COMPILE_FLAGS _target_name _out_compile_flags _header_filename)
   2
   3     # Add the precompiled header to the build
   4     SET(_gch_filename "${_header_filename}.gch")
   5     LIST(APPEND ${_out_compile_flags} -c ${_header_filename} -o ${_gch_filename})
   6
   7     # This gets us our includes
   8     GET_DIRECTORY_PROPERTY(DIRINC INCLUDE_DIRECTORIES)
   9     FOREACH(item ${DIRINC})
  10         LIST(APPEND ${_out_compile_flags} -I${item})
  11     ENDFOREACH(item)
  12
  13     # This is a particular bit of undocumented/hacky magic I'm quite proud of
  14     GET_DIRECTORY_PROPERTY(_compiler_flags DEFINITIONS)
  15     STRING(REPLACE "\ " "\t" _compiler_flags ${_compiler_flags})
  16     LIST(APPEND ${_out_compile_flags} ${_compiler_flags})
  17
  18     # This gets any specific definitions that were added with set-target-property
  19     GET_TARGET_PROPERTY(_target_defs ${_target_name} COMPILE_DEFINITIONS)
  20     IF (_target_defs)
  21         FOREACH(item ${_target_defs})
  22             LIST(APPEND ${_out_compile_flags} -D${item})
  23         ENDFOREACH(item)
  24     ENDIF()
  25
  26 ENDMACRO(_PCH_GET_COMPILE_FLAGS)
  27
  28 MACRO(add_pch _target_name _header_filename _src_list)
  29
  30         SET(_gch_filename "${_header_filename}.gch")
  31
  32         LIST(APPEND ${_src_list} ${_gch_filename})
  33
  34         _PCH_GET_COMPILE_FLAGS(${_target_name} _args ${_header_filename})
  35
  36         add_custom_command(OUTPUT ${_gch_filename}
  37                    COMMAND rm -f ${_gch_filename}
  38                    COMMAND ${CMAKE_C_COMPILER} ${CMAKE_C_COMPILER_ARG1} ${_args}
  39                             DEPENDS ${_header_filename})
  40 ENDMACRO(add_pch _target_name _header_filename _src_list)