re PR target/51756 (wrong warning: uninitialized variable put into program memory area)

	PR target/51756
	* config/avr/avr.c (avr_encode_section_info): Test for absence of
	DECL_EXTERNAL when checking for initializers of progmem variables.

From-SVN: r183129

gcc/ChangeLog

+2012-01-10  Georg-Johann Lay  <avr@gjlay.de>
+
+	PR target/51756
+	* config/avr/avr.c (avr_encode_section_info): Test for absence of
+	DECL_EXTERNAL when checking for initializers of progmem variables.
+
 2012-01-12  Ira Rosen  <irar@il.ibm.com>
 
 	PR tree-optimization/51799

gcc/config/avr/avr.c

@@ -7222,6 +7222,7 @@ avr_encode_section_info (tree decl, rtx rtl, int new_decl_p)
   if (new_decl_p
       && decl && DECL_P (decl)
       && NULL_TREE == DECL_INITIAL (decl)
+      && !DECL_EXTERNAL (decl)
       && avr_progmem_p (decl, DECL_ATTRIBUTES (decl)))
     {
       warning (OPT_Wuninitialized,