Using intltool with cmake

Question

I'm writing a GNOME application and use CMake. Now I'm considering making the app translatable, for which GNU provides intltool, gettext, msgfmt, etc.. autotools supports these tools and the entire i18n process out of the box.

How do I get this to work with CMake? Are there any modules or snippets of code around?

Answer 1

Nowadays, the best way to use intltool and gettext together with CMake is to, first, detect if the modules are present in the system and set a few variables like this:

# Setting up Intl
find_package (Intl REQUIRED)
find_package(Gettext REQUIRED)
include_directories(${INTL_INCLUDE_DIRS})
link_directories(${INTL_LIBRARY_DIRS})

Then, you can build the po files like this::

FIND_PROGRAM(GETTEXT_MSGFMT_EXECUTABLE msgfmt)

IF(NOT GETTEXT_MSGFMT_EXECUTABLE)
    MESSAGE("------
    NOTE: msgfmt not found. Translations will *not* be installed
------")
ELSE(NOT GETTEXT_MSGFMT_EXECUTABLE)

  SET(catalogname rkward)

  FILE(GLOB PO_FILES *.po)
  SET(GMO_FILES)

  FOREACH(_poFile ${PO_FILES})
    GET_FILENAME_COMPONENT(_poFileName ${_poFile} NAME)
    STRING(REGEX REPLACE "^${catalogname}_?" "" _langCode ${_poFileName} )
    STRING(REGEX REPLACE "\\.po$" "" _langCode ${_langCode} )

    IF( _langCode )
      GET_FILENAME_COMPONENT(_lang ${_poFile} NAME_WE)
      SET(_gmoFile ${CMAKE_CURRENT_BINARY_DIR}/${_lang}.gmo)

      ADD_CUSTOM_COMMAND(OUTPUT ${_gmoFile}
        COMMAND ${GETTEXT_MSGFMT_EXECUTABLE} --check -o ${_gmoFile} ${_poFile}
        DEPENDS ${_poFile})
      INSTALL(FILES ${_gmoFile} DESTINATION ${LOCALE_INSTALL_DIR}/${_langCode}/LC_MESSAGES/ RENAME ${catalogname}.mo)
      LIST(APPEND GMO_FILES ${_gmoFile})
    ENDIF( _langCode )

  ENDFOREACH(_poFile ${PO_FILES})

  ADD_CUSTOM_TARGET(translations ALL DEPENDS ${GMO_FILES})

ENDIF(NOT GETTEXT_MSGFMT_EXECUTABLE)