dnl First check if we have argp available from libc

AC_LINK_IFELSE(

	[AC_LANG_PROGRAM(

		[#include <argp.h>],

		[int argc=1; char *argv[]={"test"}; argp_parse(0,argc,argv,0,0,0); return 0;]

		)],

	[libc_has_argp="true"],

	[libc_has_argp="false"]

)

dnl If libc doesn't provide argp, then test for libargp

if test "$libc_has_argp" = "false" ; then

	AC_MSG_WARN("libc does not have argp")

	AC_CHECK_LIB([argp], [argp_parse], [have_argp="true"], [have_argp="false"])

	if test "$have_argp" = "false"; then

		AC_MSG_ERROR("no libargp found")

	else

		LIBS+=" -largp"

	fi

fi