CMakeMacros.cmake

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