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https://github.com/jbeverly/pam_ssh_agent_auth/pull/41
From ad2cc74dce3a6eaff0df193a2ae3db177e0d594f Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Fri, 30 Sep 2022 20:51:17 +0100
Subject: [PATCH 1/2] Fix function prototypes in configure
This fixes building with Clang 16.
Bug: https://bugs.gentoo.org/870721
Signed-off-by: Sam James <sam@gentoo.org>
--- a/configure.ac
+++ b/configure.ac
@@ -500,7 +500,7 @@ int main(void) { exit(0); }
AC_DEFINE(HAVE_BUNDLE, 1, [Define if your system uses bundles instead of ELF shared objects])
AC_MSG_CHECKING(if we have working getaddrinfo)
AC_TRY_RUN([#include <mach-o/dyld.h>
-main() { if (NSVersionOfRunTimeLibrary("System") >= (60 << 16))
+int main() { if (NSVersionOfRunTimeLibrary("System") >= (60 << 16))
exit(0);
else
exit(1);
@@ -1467,7 +1467,7 @@ AC_MSG_CHECKING([for (overly) strict mkstemp])
AC_RUN_IFELSE(
[AC_LANG_SOURCE([[
#include <stdlib.h>
-main() { char template[]="conftest.mkstemp-test";
+int main() { char template[]="conftest.mkstemp-test";
if (mkstemp(template) == -1)
exit(1);
unlink(template); exit(0);
@@ -2598,7 +2598,7 @@ dnl test snprintf (broken on SCO w/gcc)
#include <stdio.h>
#include <string.h>
#ifdef HAVE_SNPRINTF
-main()
+int main()
{
char buf[50];
char expected_out[50];
@@ -2615,7 +2615,7 @@ main()
exit(0);
}
#else
-main() { exit(0); }
+int main() { exit(0); }
#endif
]])], [ true ], [ AC_DEFINE(BROKEN_SNPRINTF) ],
AC_MSG_WARN([cross compiling: Assuming working snprintf()])
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