Improvement the detection of libXss

The test for Xss has been altered to ask where the library is first before checking for the required API function.

Signed-off-by: aneejit1 <aneejit1@gmail.com>

ConfigureChecks.cmake

@@ -212,15 +212,23 @@ endif( )
 
 
 if( BUILD_KARM AND WITH_XSCREENSAVER )
-  check_library_exists( Xss XScreenSaverQueryInfo "" HAVE_XSSLIB )
-  if( HAVE_XSSLIB )
   pkg_search_module( XSS xscrnsaver )
-  else( )
-    check_library_exists( Xext XScreenSaverQueryInfo "" HAVE_XSSLIB )
+
+  if( XSS_FOUND )
+    tde_save_and_set( CMAKE_REQUIRED_INCLUDES "${XSS_INCLUDE_DIRS}" )
+    check_library_exists( Xss XScreenSaverQueryInfo "${XSS_LIBRARY_DIRS}" HAVE_XSSLIB )
+    tde_restore( CMAKE_REQUIRED_INCLUDES )
+  else( XSS_FOUND )
+    check_library_exists( Xss XScreenSaverQueryInfo "" HAVE_XSSLIB )
+  endif( XSS_FOUND )
+
+  if( NOT HAVE_XSSLIB )
+    check_library_exists( Xext XScreenSaverQueryInfo "$(XEXT_LIBRARY_DIRS}" HAVE_XSSLIB )
     if( HAVE_XSSLIB )
       pkg_search_module( XSS xext )
     endif( )
   endif( )
+
   check_include_file( X11/extensions/scrnsaver.h HAVE_XSCREENSAVER_H )
   if( HAVE_XSSLIB AND HAVE_XSCREENSAVER_H )
     set( HAVE_LIBXSS 1 )