Suppress -Wundef warnings in glibc-rh1189278.patch.  Specific to the
backport, so no upstream patch.

diff --git a/elf/dl-tls.c b/elf/dl-tls.c
index b9f58a9cd2745b95..02857f5d61fcfc81 100644
--- a/elf/dl-tls.c
+++ b/elf/dl-tls.c
@@ -404,7 +404,7 @@ _dl_resize_dtv (dtv_t *dtv)
   size_t newsize = GL(dl_tls_max_dtv_idx) + DTV_SURPLUS;
   size_t oldsize = dtv[-1].counter;
 
-#if SHARED
+#ifdef SHARED
   if (dtv == GL(dl_initial_dtv))
     {
       /* This is the initial dtv that was either statically allocated in