git: 8f766130607e - stable/15 - libc: Add _PRINTF_NAN_LEN_MAX per C23

The branch stable/15 has been updated by kfv:

URL: https://cgit.FreeBSD.org/src/commit/?id=8f766130607ea84c129862deeec414dc1ebe2451

commit 8f766130607ea84c129862deeec414dc1ebe2451
Author:     Faraz Vahedi <kfv@FreeBSD.org>
AuthorDate: 2026-08-14 11:43:23 +0000
Commit:     Faraz Vahedi <kfv@FreeBSD.org>
CommitDate: 2026-10-20 08:09:33 +0000

    libc: Add _PRINTF_NAN_LEN_MAX per C23
    
    Reviewed by:    fuz
    Approved by:    fuz (mentor)
    MFC after:      1 month
    Differential Revision: https://reviews.freebsd.org/D58842
    
    (cherry picked from commit 10d5a548596ce7c111ea4a463d3f7d5f0cb1ae4f)
---
 include/stdio.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/stdio.h b/include/stdio.h
index 753c7f3df03f..ea016d65095d 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -220,6 +220,10 @@ __END_DECLS
 #endif
 #define	FILENAME_MAX	1024	/* must be <= PATH_MAX <sys/syslimits.h> */
 
+#if __ISO_C_VISIBLE >= 2023
+#define _PRINTF_NAN_LEN_MAX	3
+#endif
+
 /* System V/ANSI C; this is the wrong way to do this, do *not* use these. */
 #if __XSI_VISIBLE
 #define	P_tmpdir	"/tmp/"