commit 26c7c6bac9da305b634a661aa491dae2756581ec

Author: Joseph Myers <joseph@codesourcery.com>

Date:   Tue Oct 5 14:25:40 2021 +0000

    Fix stdlib/tst-setcontext.c for GCC 12 -Warray-compare

    Building stdlib/tst-setcontext.c fails with GCC mainline:

    tst-setcontext.c: In function 'f2':

    tst-setcontext.c:61:16: error: comparison between two arrays [-Werror=array-compare]

       61 |   if (on_stack < st2 || on_stack >= st2 + sizeof (st2))

          |                ^

    tst-setcontext.c:61:16: note: use '&on_stack[0] < &st2[0]' to compare the addresses

    The comparison in this case is deliberate, so adjust it as suggested

    in that note.

    Tested with build-many-glibcs.py (GCC mainline) for aarch64-linux-gnu.

    (cherry picked from commit a0f0c08e4fe18e78866539b0571f8e4b57dba7a3)

diff --git a/stdlib/tst-setcontext.c b/stdlib/tst-setcontext.c

index 1b511708c1469444..1c2925bb760c9eb4 100644

--- a/stdlib/tst-setcontext.c

+++ b/stdlib/tst-setcontext.c

@@ -58,7 +58,7 @@ f2 (void)

   puts ("start f2");

   printf ("&on_stack=%p\n", on_stack);

-  if (on_stack < st2 || on_stack >= st2 + sizeof (st2))

+  if (&on_stack[0] < &st2[0] || &on_stack[0] >= st2 + sizeof (st2))

     {

       printf ("%s: memory stack is not where it belongs!", __FUNCTION__);

       exit (1);