mirror of https://git.tukaani.org/xz.git
CMake: Add support for building and installing xz with translations.
If gettext tools are available, the .po files listed in po/LINGUAS are converted using msgfmt. This allows building with translations directly from xz.git without Autotools. If gettext tools aren't available, the Autotools-created .gmo files in the "po" directory will be used. This allows CMake-based build to use translations from Autotools-generated tarball. If translation support is found (Intl_FOUND) but both the gettext tools and the pre-generated .gmo files are missing, then "make" will fail.
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@ -10,8 +10,7 @@
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# is somewhat experimental and not as portable as using ./configure.
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#
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# On some platforms this builds also xz and xzdec, but these are
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# highly experimental and meant for testing only:
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# - No translations
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# highly experimental and meant for testing only.
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#
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# Other missing things:
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# - No xzgrep or other scripts or their symlinks
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@ -42,6 +41,7 @@
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#
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#############################################################################
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# NOTE: Translation support is disabled with CMake older than 3.20.
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cmake_minimum_required(VERSION 3.13...3.27 FATAL_ERROR)
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include(CMakePushCheckState)
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@ -189,6 +189,22 @@ if(HAVE_CLOCK_GETTIME OR HAVE_CLOCK_GETTIME_LIBRT)
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tuklib_add_definition_if(ALL HAVE_CLOCK_MONOTONIC)
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endif()
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# Translation support requires CMake 3.20 because it added the Intl::Intl
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# target so we don't need to play with the individual variables.
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#
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# The defintion ENABLE_NLS is added only to those targets that use it, thus
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# it's not done here. (xz has translations, xzdec doesn't.)
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if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.20")
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find_package(Intl)
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find_package(Gettext)
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if(Intl_FOUND)
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option(ENABLE_NLS "Native Language Support (translated messages)" ON)
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# The *installed* name of the translation files is "xz.mo".
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set(TRANSLATION_DOMAIN "xz")
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endif()
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endif()
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# Options for new enough GCC or Clang on any arch or operating system:
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if(CMAKE_C_COMPILER_ID MATCHES GNU|Clang)
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# configure.ac has a long list but it won't be copied here:
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@ -1489,6 +1505,54 @@ if(NOT MSVC OR MSVC_VERSION GREATER_EQUAL 1900)
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endif()
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endif()
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if(ENABLE_NLS)
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target_link_libraries(xz PRIVATE Intl::Intl)
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target_compile_definitions(xz PRIVATE
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ENABLE_NLS
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PACKAGE="${TRANSLATION_DOMAIN}"
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LOCALEDIR="${CMAKE_INSTALL_FULL_LOCALEDIR}"
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)
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file(STRINGS po/LINGUAS LINGUAS)
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# Where to find .gmo files. If msgfmt is available, the .po files
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# will be converted as part of the build. Otherwise we will use
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# the pre-generated .gmo files which are included in XZ Utils
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# tarballs by Autotools.
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set(GMO_DIR "${CMAKE_CURRENT_SOURCE_DIR}/po")
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if(GETTEXT_FOUND)
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# NOTE: gettext_process_po_files' INSTALL_DESTINATION is
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# incompatible with how Autotools requires the .po files to
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# be named. CMake would require each .po file to be named with
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# the translation domain and thus each .po file would need its
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# own language-specific directory (like "po/fi/xz.po"). On top
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# of this, INSTALL_DESTINATION doesn't allow specifying COMPONENT
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# and thus the .mo files go into "Unspecified" component. So we
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# can use gettext_process_po_files to convert the .po files but
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# installation needs to be done with our own code.
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#
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# Also, the .gmo files will go to root of the build directory
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# instead of neatly into a subdirectory. This is hardcoded in
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# CMake's FindGettext.cmake.
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foreach(LANG IN LISTS LINGUAS)
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gettext_process_po_files("${LANG}" ALL
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PO_FILES "${CMAKE_CURRENT_SOURCE_DIR}/po/${LANG}.po")
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endforeach()
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set(GMO_DIR "${CMAKE_CURRENT_BINARY_DIR}")
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endif()
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foreach(LANG IN LISTS LINGUAS)
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install(
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FILES "${GMO_DIR}/${LANG}.gmo"
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DESTINATION "${CMAKE_INSTALL_LOCALEDIR}/${LANG}/LC_MESSAGES"
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RENAME "${TRANSLATION_DOMAIN}.mo"
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COMPONENT xz)
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endforeach()
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endif()
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install(TARGETS xz
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RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
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COMPONENT xz)
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