dnl Process this file with autoconf to produce a configure script.
AC_RELEASE("$Id: configure.in,v 1.1 2008/02/15 01:47:15 marka Exp $")
AC_INIT(query-loc.c)

dnl Checks for programs.
AC_PROG_CC
if test "$GCC" = "yes"; then
	CFLAGS="${CFLAGS} -Wall"
fi
AC_PROG_INSTALL

dnl Checks for libraries.
AC_CHECK_LIB(resolv, res_query)

dnl Checks for header files.
AC_HEADER_STDC
AC_CONFIG_HEADER(config.h)
AC_CHECK_HEADER(resolv.h, , AC_MSG_ERROR("No headers for name service applications"))
AC_CHECK_HEADER(arpa/nameser.h, , AC_MSG_ERROR("No headers for name service applications"))
AC_CHECK_HEADER(sys/time.h, , AC_MSG_ERROR("Mandatory header missing on your system"))
AC_CHECK_HEADER(unistd.h, , AC_MSG_ERROR("Mandatory header missing on your system"))


dnl This one is only useful for Solaris?
AC_MSG_CHECKING(if libnsl is mandatory)
AC_TRY_LINK([#include <sys/types.h>
             #include <netinet/in.h>
             #include <arpa/nameser.h>
             #include <resolv.h>
             union
             {
                HEADER hdr;	
                u_char buf[4096]; /* With RFC 2671, otherwise 512 is enough */
             }
             response;
             char *domain;
             int requested_type;	], 
	[res_query(domain,
		  C_IN,		
		  requested_type,	
		  (u_char *) & response,	
		  sizeof (response)) ], dnl
	[AC_MSG_RESULT(no)], dnl
	[AC_MSG_RESULT(yes); LIBS="${LIBS} -lnsl"]) 

dnl Check for the loc_ntoa macro/function
AC_MSG_CHECKING(loc_ntoa)
AC_TRY_LINK([#include <resolv.h>], dnl
	[u_char *cp; char *result; loc_ntoa(cp, result)], dnl
	[AC_MSG_RESULT(yes); AC_DEFINE(HAVE_LOC_NTOA)], dnl
	[AC_MSG_RESULT([no, using the alternative]); LOC_NTOA=loc_ntoa.o]) 
AC_SUBST(LOC_NTOA)

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_CHECK_SIZEOF(long)
AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(short)
AC_CHECK_SIZEOF(char)

dnl Misc.
AC_OUTPUT(Makefile)