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" ])