Fix Install the locale directory in a standard location

* related https://codeberg.org/minenux/minetest-engine/issues/20
* fixed builds in linux distributions
* already done 2349d31bae
* related: https://github.com/minetest/minetest/pull/9618
* backported ca8957f500
* Fix detection of in-place path_locale when RUN_IN_PLACE=0
* related: https://github.com/minetest/minetest/issues/9745
* cmake: Silence warnings backported https://github.com/minetest/minetest/pull/9750
* Fixes https://github.com/minetest/minetest/issues/9734

cmake/Modules/FindGettextLib.cmake

@@ -55,10 +55,10 @@ endif(WIN32)
 
 
 include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(GetText DEFAULT_MSG ${GETTEXT_REQUIRED_VARS})
+find_package_handle_standard_args(GettextLib DEFAULT_MSG ${GETTEXT_REQUIRED_VARS})
 
 
-if(GETTEXT_FOUND)
+if(GETTEXTLIB_FOUND)
 	# BSD variants require special linkage as they don't use glibc
 	if(${CMAKE_SYSTEM_NAME} MATCHES "BSD|DragonFly")
 		set(GETTEXT_LIBRARY "intl")

cmake/Modules/FindJson.cmake

@@ -11,14 +11,14 @@ if(ENABLE_SYSTEM_JSONCPP)
 	find_path(JSON_INCLUDE_DIR json/allocator.h PATH_SUFFIXES jsoncpp)
 
 	include(FindPackageHandleStandardArgs)
-	find_package_handle_standard_args(JSONCPP DEFAULT_MSG JSON_LIBRARY JSON_INCLUDE_DIR)
+	find_package_handle_standard_args(Json DEFAULT_MSG JSON_LIBRARY JSON_INCLUDE_DIR)
 
-	if(JSONCPP_FOUND)
+	if(JSON_FOUND)
 		message(STATUS "Using system JSONCPP library.")
 	endif()
 endif()
 
-if(NOT JSONCPP_FOUND)
+if(NOT JSON_FOUND)
 	message(STATUS "Using bundled JSONCPP library.")
 	set(JSON_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/lib/jsoncpp)
 	set(JSON_LIBRARY jsoncpp)

cmake/Modules/FindLuaJIT.cmake

@@ -15,7 +15,7 @@ set (LUA_VERSION_STRING ${LuaJIT_VERSION})
 INCLUDE(FindPackageHandleStandardArgs)
 # handle the QUIETLY and REQUIRED arguments and set LUAJIT_FOUND to TRUE if
 # all listed variables are TRUE
-FIND_PACKAGE_HANDLE_STANDARD_ARGS(LuaJit
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(LuaJIT
 	REQUIRED_VARS LUA_LIBRARY LUA_INCLUDE_DIR
 	VERSION_VAR LUA_VERSION_STRING)
 

cmake/Modules/FindVorbis.cmake

@@ -20,13 +20,13 @@ if(NOT GP2XWIZ)
     # Handle the QUIETLY and REQUIRED arguments and set VORBIS_FOUND
     # to TRUE if all listed variables are TRUE.
     include(FindPackageHandleStandardArgs)
-    find_package_handle_standard_args(VORBIS DEFAULT_MSG
+    find_package_handle_standard_args(Vorbis DEFAULT_MSG
         OGG_INCLUDE_DIR VORBIS_INCLUDE_DIR
         OGG_LIBRARY VORBIS_LIBRARY VORBISFILE_LIBRARY)
 else(NOT GP2XWIZ)
     find_path(VORBIS_INCLUDE_DIR tremor/ivorbisfile.h)
     find_library(VORBIS_LIBRARY NAMES vorbis_dec)
-    find_package_handle_standard_args(VORBIS DEFAULT_MSG
+    find_package_handle_standard_args(Vorbis DEFAULT_MSG
         VORBIS_INCLUDE_DIR VORBIS_LIBRARY)
 endif(NOT GP2XWIZ)
     

src/CMakeLists.txt

@@ -62,7 +62,7 @@ set(USE_GETTEXT FALSE)
 
 if(ENABLE_GETTEXT)
 	find_package(GettextLib)
-	if(GETTEXT_FOUND)
+	if(GETTEXTLIB_FOUND)
 		if(WIN32)
 			message(STATUS "GetText library: ${GETTEXT_LIBRARY}")
 			message(STATUS "GetText DLL: ${GETTEXT_DLL}")
@@ -78,7 +78,7 @@ if(ENABLE_GETTEXT)
 		if(NOT Intl_LIBRARIES STREQUAL "")
 			message(STATUS "GetText Intl : ${Intl_LIBRARIES}")
 		endif()
-	endif(GETTEXT_FOUND)
+	endif(GETTEXTLIB_FOUND)
 else()
 	mark_as_advanced(GETTEXT_ICONV_DLL GETTEXT_INCLUDE_DIR GETTEXT_LIBRARY GETTEXT_MSGFMT)
 	message(STATUS "GetText disabled.")
@@ -655,7 +655,7 @@ set(GETTEXT_BLACKLISTED_LOCALES
 
 option(APPLY_LOCALE_BLACKLIST "Use a blacklist to avoid broken locales" TRUE)
 
-if (GETTEXT_FOUND AND APPLY_LOCALE_BLACKLIST)
+if (GETTEXTLIB_FOUND AND APPLY_LOCALE_BLACKLIST)
 	set(GETTEXT_USED_LOCALES "")
 	foreach(LOCALE ${GETTEXT_AVAILABLE_LOCALES})
 		if (NOT ";${GETTEXT_BLACKLISTED_LOCALES};" MATCHES ";${LOCALE};")