package/openssh: fix build failure with gcc 11.x

The patch fix the following build failure:

output/host/bin/arm-buildroot-linux-uclibcgnueabihf-gcc -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
-D_FILE_OFFSET_BITS=64  -Os -g0  -pipe -Wno-error=format-truncation -Wall -Wextra -Wpointer-arith
-Wuninitialized -Wsign-compare -Wformat-security -Wsizeof-pointer-memaccess -Wno-pointer-sign
-Wno-unused-parameter -Wno-unused-result -Wimplicit-fallthrough -Wmisleading-indentation
-fno-strict-aliasing -D_FORTIFY_SOURCE=2 -ftrapv -fzero-call-used-regs=used -fno-builtin-memset
-fstack-protector-strong   -fPIC -I. -I.. -I. -I./.. -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
-D_FILE_OFFSET_BITS=64 -D_XOPEN_SOURCE=600 -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_GNU_SOURCE
-DHAVE_CONFIG_H -c port-aix.c
sha2.c: In function ‘SHA256Init’:
sha2.c:360:1: sorry, unimplemented: ‘-fzero-call-used-regs’ not supported on this target
  360 | }
      | ^
make[3]: *** [Makefile:106: sha2.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [Makefile:199: openbsd-compat/libopenbsd-compat.a] Error 2

This commit applies an upstream patch that improves the detection of
-fzero-call-used-regs=used.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>
(cherry picked from commit 4aff617b9591dc46d965eaa00f9701943e0cd723)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/openssh/0001-Improve-detection-of-fzero-call-used-regs-used.patch

@@ -0,0 +1,32 @@
+From f9193f03db0029fc9c31fbdb5c66a2737446bd8f Mon Sep 17 00:00:00 2001
+From: Darren Tucker <dtucker@dtucker.net>
+Date: Mon, 25 Mar 2024 09:28:02 +1100
+Subject: [PATCH] Improve detection of -fzero-call-used-regs=used.
+
+Should better detect problems with gcc 13 on m68k.  bz#3673 from Colin
+Watson via bz#3673 and https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110934
+
+Signed-off-by: Darren Tucker <dtucker@dtucker.net>
+Upstream: https://github.com/openssh/openssh-portable/commit/f9193f03db0029fc9c31fbdb5c66a2737446bd8f
+---
+ m4/openssh.m4 | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/m4/openssh.m4 b/m4/openssh.m4
+index 033df501c3d8..176a8d1c9282 100644
+--- a/m4/openssh.m4
++++ b/m4/openssh.m4
+@@ -20,7 +20,10 @@ char *f2(char *s, ...) {
+ 	va_end(args);
+ 	return strdup(ret);
+ }
++int i;
++double d;
+ const char *f3(int s) {
++	i = (int)d;
+ 	return s ? "good" : "gooder";
+ }
+ int main(int argc, char **argv) {
+-- 
+2.43.0
+

package/openssh/openssh.mk

@@ -13,6 +13,9 @@ OPENSSH_SITE = http://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable
 OPENSSH_LICENSE = BSD-3-Clause, BSD-2-Clause, Public Domain
 OPENSSH_LICENSE_FILES = LICENCE
 
+# 0001-Improve-detection-of-fzero-call-used-regs-used.patch
+OPENSSH_AUTORECONF = YES
+
 OPENSSH_CONF_ENV = \
 	LD="$(TARGET_CC)" \
 	LDFLAGS="$(TARGET_CFLAGS)" \