CMake: Warn if gettext tools and pre-created .gmo files are missing.

It's only done with CMake >= 3.20 and if library support
for translation was already found.

Sort of fixes: https://github.com/tukaani-project/xz/issues/82
This commit is contained in:
Lasse Collin 2024-02-29 16:35:52 +02:00 committed by Jia Tan
parent 86bec8334b
commit 46c3e113d8
1 changed files with 25 additions and 0 deletions

View File

@ -278,9 +278,34 @@ endif()
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)
# If translation support is enabled but neither gettext tools or
# pre-generated .gmo files exist, translation support cannot be
# enabled.
#
# The detection of pre-generated .gmo files is done by only
# checking for the existence of a single .gmo file; Ukrainian
# is one of many translations that gets regular updates.
if(ENABLE_NLS AND NOT GETTEXT_FOUND AND
NOT EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/po/uk.gmo")
# This only sets the variable, not the cache variable!
set(ENABLE_NLS OFF)
# This message is shown only when new enough CMake is used and
# library support for translations was found. The assumptions is
# that in this situation the user might have interest in the
# translations. This also keeps this code simpler.
message(WARNING "Native language support (NLS) has been disabled. "
"NLS support requires either gettext tools or "
"pre-generated .gmo files. The latter are only "
"available in distribution tarballs. "
"To avoid this warning, NLS can be explicitly "
"disabled by passing -DENABLE_NLS=OFF to cmake.")
endif()
# The *installed* name of the translation files is "xz.mo".
set(TRANSLATION_DOMAIN "xz")
endif()