Reapply C99 compatibility fix

lldpd-configure-c99.patch

@@ -0,0 +1,35 @@
+commit 01aee0f3601c60e570aeb9040c036c83d053cc5a
+Author: Florian Weimer <fweimer@redhat.com>
+Date:   Thu Dec 8 13:01:07 2022 +0100
+
+    m4/progname.m4: Include <stdio.h> for printf in lldp_CHECK___PROGNAME
+    
+    Otherwise the checks always fails with a compiler that does not
+    support implict function declarations.
+
+diff --git a/configure b/configure
+index 10baaca5824a3568..f43b2fd9beb18847 100755
+--- a/configure
++++ b/configure
+@@ -18976,7 +18976,7 @@ else
+ 
+     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+-
++#include<stdio.h>
+ int
+ main ()
+ {
+diff --git a/m4/progname.m4 b/m4/progname.m4
+index 031aba65cbf0cc7d..b1a80f7f28c628a8 100644
+--- a/m4/progname.m4
++++ b/m4/progname.m4
+@@ -4,7 +4,7 @@
+ AC_DEFUN([lldp_CHECK___PROGNAME],[
+   AC_CACHE_CHECK([whether libc defines __progname], lldp_cv_check___progname, [
+     AC_LINK_IFELSE([AC_LANG_PROGRAM(
+-                     [[]],
++                     [[#include<stdio.h>]],
+                      [[ extern char *__progname; printf("%s", __progname); ]])],
+                      [ lldp_cv_check___progname="yes" ],
+                      [ lldp_cv_check___progname="no" ])

lldpd.spec

@@ -1,6 +1,6 @@
 Name:     lldpd
 Version:  1.0.16
-Release:  3%{?dist}
+Release:  4%{?dist}
 Summary:  ISC-licensed implementation of LLDP
 
 License:  ISC
@@ -10,6 +10,7 @@ Source1:  %{name}-fedora.service
 Source2:  %{name}-tmpfiles
 Source3:  %{name}-fedora.sysconfig
 Source4:  %{name}-systemd-sysusers.conf
+Patch1:   lldpd-configure-c99.patch
 
 BuildRequires: check-devel
 BuildRequires: gcc
@@ -113,6 +114,9 @@ exit 0
 
 
 %changelog
+* Tue Nov 28 2023 Florian Weimer <fweimer@redhat.com> - 1.0.16-4
+- Reapply C99 compatibility fix
+
 * Thu Jul 20 2023 Fedora Release Engineering <releng@fedoraproject.org> - 1.0.16-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild