cmake: fix gettext support

Building exiv2 with uclibc and gettext fails currently as detected
by the buildroot autobuilders:
http://autobuild.buildroot.net/results/def/defcdd3dd57b031c31bb16c0075f079a482bf52d/build-end.log

config/CMakeChecks.txt

@@ -95,8 +95,16 @@ ELSE( EXIV2_ENABLE_SHARED )
 ENDIF( EXIV2_ENABLE_SHARED )
 
 IF( EXIV2_ENABLE_NLS )
-    #FIND_PACKAGE(Intl REQUIRED)
-    #INCLUDE_DIRECTORIES(${Intl_INCLUDE_DIRS})
+    FIND_PACKAGE(Intl)
+    if(Intl_FOUND)
+        INCLUDE_DIRECTORIES(${Intl_INCLUDE_DIRS})
+        find_library(LIBINTL_LIBRARY NAMES intl libintl)
+        if(libintl_FOUND)
+            SET(LIBINTL_LIBRARIES ${LIBINTL_LIBRARY})
+        else(libintl_FOUND)
+            SET(LIBINTL_LIBRARIES)
+        endif()
+    endif()
     IF( NOT LOCALEDIR )
         SET( LOCALEDIR "${CMAKE_INSTALL_LOCALEDIR}" )
         IF( WIN32 )

src/CMakeLists.txt

@@ -316,13 +316,13 @@ msvc_runtime_configure(${EXIV2_ENABLE_SHARED} ${EXIV2_ENABLE_DYNAMIC_RUNTIME})
 # ******************************************************************************
 # exiv2 application
 ADD_EXECUTABLE( exiv2 ${EXIV2_SRC}  ${EXIV2_HDR} )
-TARGET_LINK_LIBRARIES( exiv2 exiv2lib )
+TARGET_LINK_LIBRARIES( exiv2 exiv2lib ${LIBINTL_LIBRARIES} )
 INSTALL( TARGETS exiv2 ${INSTALL_TARGET_STANDARD_ARGS} )
 
 # ******************************************************************************
 # connection test application
 ADD_EXECUTABLE( conntest ${CONNTEST} )
-TARGET_LINK_LIBRARIES( conntest ${PRIVATE_VAR}  exiv2lib ${CURL_LIBRARIES} ${SSH_LIBRARIES})
+TARGET_LINK_LIBRARIES( conntest ${PRIVATE_VAR}  exiv2lib ${CURL_LIBRARIES} ${SSH_LIBRARIES} ${LIBINTL_LIBRARIES} )
 
 # ******************************************************************************
 # exifprint application
@@ -332,7 +332,7 @@ TARGET_LINK_LIBRARIES( conntest ${PRIVATE_VAR}  exiv2lib ${CURL_LIBRARIES} ${SSH
 # ******************************************************************************
 # remotetest application
 ADD_EXECUTABLE( remotetest ${REMOTETEST} )
-TARGET_LINK_LIBRARIES( remotetest exiv2lib )
+TARGET_LINK_LIBRARIES( remotetest exiv2lib ${LIBINTL_LIBRARIES} )
 
 # ******************************************************************************
 # Headers