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" ])