On OpenBSD 6.5, I see a test failure of 'test-stdio'.
The _PRINTF_NAN_LEN_MAX check fails because the printed representation
of NaN, here, is "-nan"; however, gnulib's stdio.h had defined
_PRINTF_NAN_LEN_MAX to 3.
This patch fixes the value.
2023-04-07 Bruno Haible <br...@clisp.org>
stdio: Fix the value of _PRINTF_NAN_LEN_MAX on OpenBSD.
* lib/stdio.in.h (_PRINTF_NAN_LEN_MAX): Define to 4 on OpenBSD.
diff --git a/lib/stdio.in.h b/lib/stdio.in.h
index 69242b6c36..f318014978 100644
--- a/lib/stdio.in.h
+++ b/lib/stdio.in.h
@@ -209,12 +209,11 @@
#ifndef _PRINTF_NAN_LEN_MAX
# if defined __FreeBSD__ || defined __DragonFly__ \
|| defined __NetBSD__ \
- || defined __OpenBSD__ \
|| (defined __APPLE__ && defined __MACH__)
/* On BSD systems, a NaN value prints as just "nan", without a sign. */
# define _PRINTF_NAN_LEN_MAX 3
-# elif (__GLIBC__ >= 2) || MUSL_LIBC || defined __sun || defined __CYGWIN__
-/* glibc, musl libc, Solaris libc, and Cygwin produce "[-]nan". */
+# elif (__GLIBC__ >= 2) || MUSL_LIBC || defined __OpenBSD__ || defined __sun
|| defined __CYGWIN__
+/* glibc, musl libc, OpenBSD, Solaris libc, and Cygwin produce "[-]nan". */
# define _PRINTF_NAN_LEN_MAX 4
# elif defined _AIX
/* AIX produces "[-]NaNQ". */
