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     get_filename_component(FILE ${_header_filename} NAME)
   6     set(_gch_filename "${_target_name}_${FILE}.gch")
   7     list(APPEND ${_out_compile_flags} -c ${_header_filename} -o ${_gch_filename})
   8
   9     # This gets us our includes
  10     get_directory_property(DIRINC INCLUDE_DIRECTORIES)
  11     foreach(item ${DIRINC})
  12         list(APPEND ${_out_compile_flags} -I${item})
  13     endforeach(item)
  14
  15     # This is a particular bit of undocumented/hacky magic I'm quite proud of
  16     get_directory_property(_compiler_flags DEFINITIONS)
  17     string(REPLACE "\ " "\t" _compiler_flags ${_compiler_flags})
  18     list(APPEND ${_out_compile_flags} ${_compiler_flags})
  19
  20     # This gets any specific definitions that were added with set-target-property
  21     get_target_property(_target_defs ${_target_name} COMPILE_DEFINITIONS)
  22     if (_target_defs)
  23         foreach(item ${_target_defs})
  24             list(APPEND ${_out_compile_flags} -D${item})
  25         endforeach(item)
  26     endif()
  27
  28 ENDMACRO(_PCH_GET_COMPILE_FLAGS)
  29
  30 MACRO(add_pch _target_name _header_filename _src_list)
  31
  32     get_filename_component(FILE ${_header_filename} NAME)
  33     set(_gch_filename "${_target_name}_${FILE}.gch")
  34     list(APPEND ${_src_list} ${_gch_filename})
  35     _PCH_GET_COMPILE_FLAGS(${_target_name} _args ${_header_filename})
  36     file(REMOVE ${_gch_filename})
  37     add_custom_command(
  38         OUTPUT ${_gch_filename}
  39         COMMAND ${CMAKE_C_COMPILER} ${CMAKE_C_COMPILER_ARG1} ${_args}
  40         DEPENDS ${_header_filename})
  41
  42 ENDMACRO(add_pch _target_name _header_filename _src_list)