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-rw-r--r--CMakeLists.txt68
1 files changed, 66 insertions, 2 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 96ff980b..4223e3e4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,8 +10,7 @@
# is somewhat experimental and not as portable as using ./configure.
#
# On some platforms this builds also xz and xzdec, but these are
-# highly experimental and meant for testing only:
-# - No translations
+# highly experimental and meant for testing only.
#
# Other missing things:
# - No xzgrep or other scripts or their symlinks
@@ -42,6 +41,7 @@
#
#############################################################################
+# NOTE: Translation support is disabled with CMake older than 3.20.
cmake_minimum_required(VERSION 3.13...3.27 FATAL_ERROR)
include(CMakePushCheckState)
@@ -189,6 +189,22 @@ if(HAVE_CLOCK_GETTIME OR HAVE_CLOCK_GETTIME_LIBRT)
tuklib_add_definition_if(ALL HAVE_CLOCK_MONOTONIC)
endif()
+# Translation support requires CMake 3.20 because it added the Intl::Intl
+# target so we don't need to play with the individual variables.
+#
+# The defintion ENABLE_NLS is added only to those targets that use it, thus
+# it's not done here. (xz has translations, xzdec doesn't.)
+if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.20")
+ find_package(Intl)
+ find_package(Gettext)
+ if(Intl_FOUND)
+ option(ENABLE_NLS "Native Language Support (translated messages)" ON)
+
+ # The *installed* name of the translation files is "xz.mo".
+ set(TRANSLATION_DOMAIN "xz")
+ endif()
+endif()
+
# Options for new enough GCC or Clang on any arch or operating system:
if(CMAKE_C_COMPILER_ID MATCHES GNU|Clang)
# configure.ac has a long list but it won't be copied here:
@@ -1489,6 +1505,54 @@ if(NOT MSVC OR MSVC_VERSION GREATER_EQUAL 1900)
endif()
endif()
+ if(ENABLE_NLS)
+ target_link_libraries(xz PRIVATE Intl::Intl)
+
+ target_compile_definitions(xz PRIVATE
+ ENABLE_NLS
+ PACKAGE="${TRANSLATION_DOMAIN}"
+ LOCALEDIR="${CMAKE_INSTALL_FULL_LOCALEDIR}"
+ )
+
+ file(STRINGS po/LINGUAS LINGUAS)
+
+ # Where to find .gmo files. If msgfmt is available, the .po files
+ # will be converted as part of the build. Otherwise we will use
+ # the pre-generated .gmo files which are included in XZ Utils
+ # tarballs by Autotools.
+ set(GMO_DIR "${CMAKE_CURRENT_SOURCE_DIR}/po")
+
+ if(GETTEXT_FOUND)
+ # NOTE: gettext_process_po_files' INSTALL_DESTINATION is
+ # incompatible with how Autotools requires the .po files to
+ # be named. CMake would require each .po file to be named with
+ # the translation domain and thus each .po file would need its
+ # own language-specific directory (like "po/fi/xz.po"). On top
+ # of this, INSTALL_DESTINATION doesn't allow specifying COMPONENT
+ # and thus the .mo files go into "Unspecified" component. So we
+ # can use gettext_process_po_files to convert the .po files but
+ # installation needs to be done with our own code.
+ #
+ # Also, the .gmo files will go to root of the build directory
+ # instead of neatly into a subdirectory. This is hardcoded in
+ # CMake's FindGettext.cmake.
+ foreach(LANG IN LISTS LINGUAS)
+ gettext_process_po_files("${LANG}" ALL
+ PO_FILES "${CMAKE_CURRENT_SOURCE_DIR}/po/${LANG}.po")
+ endforeach()
+
+ set(GMO_DIR "${CMAKE_CURRENT_BINARY_DIR}")
+ endif()
+
+ foreach(LANG IN LISTS LINGUAS)
+ install(
+ FILES "${GMO_DIR}/${LANG}.gmo"
+ DESTINATION "${CMAKE_INSTALL_LOCALEDIR}/${LANG}/LC_MESSAGES"
+ RENAME "${TRANSLATION_DOMAIN}.mo"
+ COMPONENT xz)
+ endforeach()
+ endif()
+
install(TARGETS xz
RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
COMPONENT xz)