[PATCH v2 1/2] libc: Make string.h POSIX.1-2024 compliant

[Simon Barth]

POSIX.1-2024 added strlcpy, strlcat, and memmem to strings.h. Previously
these functions were only available as parts of BSD or GNU extensions.

Fix the header so that the symbol are visible for either the right
extensions, or for POSIX.1-2024.
---
 newlib/libc/include/string.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/newlib/libc/include/string.h b/newlib/libc/include/string.h
index 32199c027..3e66ec3dd 100644
--- a/newlib/libc/include/string.h
+++ b/newlib/libc/include/string.h
@@ -68,10 +68,12 @@ void *	 memccpy (void *__restrict, const void *__restrict, int, size_t);
 #endif
 #if __GNU_VISIBLE
 void *	 mempcpy (void *, const void *, size_t);
-void *	 memmem (const void *, size_t, const void *, size_t);
 void *	 memrchr (const void *, int, size_t);
 void *	 rawmemchr (const void *, int);
 #endif
+#if __GNU_VISIBLE || __POSIX_VISIBLE >= 202405
+void *	 memmem (const void *, size_t, const void *, size_t);
+#endif
 #if __POSIX_VISIBLE >= 200809
 char 	*stpcpy (char *__restrict, const char *__restrict);
 char 	*stpncpy (char *__restrict, const char *__restrict, size_t);
@@ -111,7 +113,7 @@ int	__xpg_strerror_r (int, char *, size_t);
 /* Reentrant version of strerror.  */
 char *	_strerror_r (struct _reent *, int, int, int *);
 
-#if __BSD_VISIBLE
+#if __BSD_VISIBLE || __POSIX_VISIBLE >= 202405L
 size_t	strlcat (char *, const char *, size_t);
 size_t	strlcpy (char *, const char *, size_t);
 #endif
-- 
2.51.2