PR bootstrap/77676 - powerpc64 and powerpc64le stage2 bootstrap fail

	* c.opt (fprintf-return-value): Temporarily initialize to zero
	to unblock bootstrap failures.

From-SVN: r240321

gcc/c-family/ChangeLog

+2016-09-21  Martin Sebor  <msebor@redhat.com>
+
+	PR bootstrap/77676
+	* c.opt (fprintf-return-value): Temporarily initialize to zero
+	to unblock bootstrap failures.
+
 2016-09-21  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/77651

gcc/c-family/c.opt

@@ -1498,7 +1498,7 @@ C++ ObjC++ Var(flag_pretty_templates) Init(1)
 -fno-pretty-templates Do not pretty-print template specializations as the template signature followed by the arguments.
 
 fprintf-return-value
-C ObjC C++ ObjC++ LTO Optimization Var(flag_printf_return_value) Init(1)
+C ObjC C++ ObjC++ LTO Optimization Var(flag_printf_return_value) Init(0)
 Treat known sprintf return values as constants.
 
 freplace-objc-classes