diff -ru a/gcc/cp/cfns.h b/gcc/cp/cfns.h
--- a/gcc/cp/cfns.h	1970-01-01 01:00:01.000000000 +0100
+++ b/gcc/cp/cfns.h	2023-04-23 09:23:28.883815598 +0200
@@ -53,6 +53,9 @@
 static unsigned int hash (const char *, unsigned int);
 #ifdef __GNUC__
 __inline
+#ifdef __GNUC_STDC_INLINE__
+__attribute__ ((__gnu_inline__))
+#endif
 #endif
 const char * libc_name_p (const char *, unsigned int);
 /* maximum key range = 391, duplicates = 0 */
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<tr><td><span title='2018-05-29 18:29:36 +0200'>2018-05-29</span></td><td><a href='/guix/commit/CODE-OF-CONDUCT?id=a076f19908d06b6df49f1c25c40de8838213cd71'>CODE-OF-CONDUCT: Switch to version 1.4 of the Contributor Covenant.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
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