commit 8d4241b8976273513e72cc1c5f6b1af3e11f0792
Author: Florian Weimer <fweimer@redhat.com>
Date:   Fri Feb 19 13:29:00 2021 +0100

    string: Work around GCC PR 98512 in rawmemchr
    
    (cherry picked from commit 044e603b698093cf48f6e6229e0b66acf05227e4)

diff --git a/string/rawmemchr.c b/string/rawmemchr.c
index 59bbeeaa42e51056..b8523118e5b3586e 100644
--- a/string/rawmemchr.c
+++ b/string/rawmemchr.c
@@ -22,24 +22,28 @@
 # define RAWMEMCHR __rawmemchr
 #endif
 
-/* Find the first occurrence of C in S.  */
-void *
-RAWMEMCHR (const void *s, int c)
-{
-  DIAG_PUSH_NEEDS_COMMENT;
+/* The pragmata should be nested inside RAWMEMCHR below, but that
+   triggers GCC PR 98512.  */
+DIAG_PUSH_NEEDS_COMMENT;
 #if __GNUC_PREREQ (7, 0)
-  /* GCC 8 warns about the size passed to memchr being larger than
-     PTRDIFF_MAX; the use of SIZE_MAX is deliberate here.  */
-  DIAG_IGNORE_NEEDS_COMMENT (8, "-Wstringop-overflow=");
+/* GCC 8 warns about the size passed to memchr being larger than
+   PTRDIFF_MAX; the use of SIZE_MAX is deliberate here.  */
+DIAG_IGNORE_NEEDS_COMMENT (8, "-Wstringop-overflow=");
 #endif
 #if __GNUC_PREREQ (11, 0)
-  /* Likewise GCC 11, with a different warning option.  */
-  DIAG_IGNORE_NEEDS_COMMENT (11, "-Wstringop-overread");
+/* Likewise GCC 11, with a different warning option.  */
+DIAG_IGNORE_NEEDS_COMMENT (11, "-Wstringop-overread");
 #endif
+
+/* Find the first occurrence of C in S.  */
+void *
+RAWMEMCHR (const void *s, int c)
+{
   if (c != '\0')
     return memchr (s, c, (size_t)-1);
-  DIAG_POP_NEEDS_COMMENT;
   return (char *)s + strlen (s);
 }
 libc_hidden_def (__rawmemchr)
 weak_alias (__rawmemchr, rawmemchr)
+
+DIAG_POP_NEEDS_COMMENT;