commit c82f5c0ce5c1c0180fca311ceb29fd2d59da7441

Author: Joseph Myers <joseph@codesourcery.com>

Date:   Wed Nov 26 00:45:19 2014 +0000

    Fix warning in setjmp/jmpbug.c.

    This patch fixes a "set but not used" warning in setjmp/jmpbug.c.  A

    variable is used only to store the result of alloca.  A cast to void

    is added to avoid the warning, and the variable is made volatile to

    ensure the call to alloca isn't optimized away for being unused.

    Tested for x86_64.

            * setjmp/jmpbug.c (test): Make foo volatile and cast it to

            void.

diff --git a/setjmp/jmpbug.c b/setjmp/jmpbug.c

index 125977b2f719dbeb..8594c5a8a782b218 100644

--- a/setjmp/jmpbug.c

+++ b/setjmp/jmpbug.c

@@ -14,7 +14,7 @@ static void

 test (int x)

 {

   jmp_buf buf;

-  char *foo;

+  char *volatile foo;

   int arr[100];

   arr[77] = x;

@@ -25,6 +25,7 @@ test (int x)

     }

   foo = (char *) alloca (128);

+  (void) foo;

   sub5 (buf);

 }