AC_CHECK_HEADERS(stdint.h inttypes.h)
AC_CHECK_HEADERS(linux/if.h)
AC_C_BIGENDIAN
+AC_CHECK_SIZEOF(unsigned long long)
+AC_CHECK_SIZEOF(unsigned long)
+AC_CHECK_SIZEOF(unsigned int)
+AC_CHECK_SIZEOF(unsigned short)
+AC_CHECK_SIZEOF(unsigned char)
+dnl the order in which libraries is checked is important
+dnl eg. adns on Solaris 2.5.1 depends on -lnsl and -lsocket
AC_CHECK_LIB(gmp,mpz_init_set_str)
AC_CHECK_LIB(gmp2,mpz_init_set_str)
+AC_CHECK_LIB(gmp,__gmpz_init_set_str)
AC_CHECK_LIB(fl,yywrap)
-AC_CHECK_LIB(adns,adns_init)
+AC_CHECK_LIB(nsl,inet_ntoa)
AC_CHECK_LIB(getopt,getopt_long)
AC_CHECK_LIB(gnugetopt,getopt_long)
+AC_CHECK_LIB(socket,socket)
+AC_CHECK_LIB(resolv,inet_aton)
+AC_CHECK_LIB(adns,adns_init)
+
+dnl check for getopt in standard library
+AC_SUBST(LIBOBJS)
+AC_CHECK_FUNCS(getopt_long , , [LIBOBJS="$LIBOBJS getopt.o getopt1.o"] )
+dnl check for alloca
+AC_CHECK_FUNCS(snprintf , , [LIBOBJS="$LIBOBJS snprintf.o"] )
+AC_FUNC_ALLOCA()
AC_OUTPUT(Makefile,echo timestamp >stamp-h)