Automatically disable NLS if gettext and/or libiconv are missing. On some platforms, such as Windows and OS X, NLS can't be enabled without a lot of custom configuration, so the build simply fails on those platforms unless -DENABLE_NLS=0 is specified. This change makes the CMake system behave more like autotools used to, and it is consistent with the detection behavior of other non-essential modules, such as GnuTLS.

git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4531 3789f03b-4d11-0410-bbf8-ca57d06f2519

CMakeLists.txt

@@ -135,34 +135,37 @@ endif()
 option(ENABLE_NLS "Enable translation of program messages" ON)
 if(ENABLE_NLS)
   # Tools
-  find_package(Gettext REQUIRED)
+  find_package(Gettext)
   set(LOCALE_DIR "${CMAKE_INSTALL_PREFIX}/share/locale")
 
   # Gettext needs iconv
-  find_package(Iconv REQUIRED)
-
-  # Headers and libraries (copied from licq)
-  set(GETTEXT_FOUND FALSE)
-
-  find_path(GETTEXT_INCLUDE_DIR libintl.h)
-  if(GETTEXT_INCLUDE_DIR)
-    set(CMAKE_REQUIRED_LIBRARIES ${ICONV_LIBRARIES})
-    check_function_exists(dgettext LIBC_HAS_DGETTEXT)
-    if(LIBC_HAS_DGETTEXT)
-      set(GETTEXT_FOUND TRUE)
-    else()
-      find_library(LIBINTL_LIBRARY NAMES intl libintl)
-      check_library_exists(${LIBINTL_LIBRARY} "dgettext" "" LIBINTL_HAS_DGETTEXT)
-      if(LIBINTL_HAS_DGETTEXT)
-        set(GETTEXT_LIBRARIES ${LIBINTL_LIBRARY} ${ICONV_LIBRARIES})
+  find_package(Iconv)
+
+  if(ICONV_FOUND)
+    # Headers and libraries (copied from licq)
+    set(GETTEXT_FOUND FALSE)
+
+    find_path(GETTEXT_INCLUDE_DIR libintl.h)
+    if(GETTEXT_INCLUDE_DIR)
+      set(CMAKE_REQUIRED_LIBRARIES ${ICONV_LIBRARIES})
+      check_function_exists(dgettext LIBC_HAS_DGETTEXT)
+      if(LIBC_HAS_DGETTEXT)
         set(GETTEXT_FOUND TRUE)
+      else()
+        find_library(LIBINTL_LIBRARY NAMES intl libintl)
+        check_library_exists(${LIBINTL_LIBRARY} "dgettext" "" LIBINTL_HAS_DGETTEXT)
+        if(LIBINTL_HAS_DGETTEXT)
+          set(GETTEXT_LIBRARIES ${LIBINTL_LIBRARY} ${ICONV_LIBRARIES})
+          set(GETTEXT_FOUND TRUE)
+        endif()
       endif()
+      set(CMAKE_REQUIRED_LIBRARIES)
     endif()
-    set(CMAKE_REQUIRED_LIBRARIES)
   endif()
 
   if(NOT GETTEXT_FOUND)
-    message(FATAL_ERROR "Gettext NOT found")
+    message(WARNING "Gettext NOT found.  Native Language Support disabled.")
+    set(ENABLE_NLS 0)
   endif()
 endif()