Try to correctly find res_mkquery in libresolv, even in cases where a
preprocessor-based rename in <resolv.h> may screw us up.
--- hesiod-3.1.0/configure.in	2006-03-30 11:22:11.000000000 -0500
+++ hesiod-3.1.0/configure.in	2006-03-30 13:31:02.000000000 -0500
@@ -12,7 +12,14 @@
 AC_EGREP_HEADER(pw_change, pwd.h, AC_DEFINE(HAVE_PW_CHANGE))
 AC_EGREP_HEADER(pw_expire, pwd.h, AC_DEFINE(HAVE_PW_EXPIRE))
 
-AC_CHECK_FUNC(res_mkquery, :, [AC_CHECK_LIB(resolv, res_mkquery)])
+AC_CHECK_FUNC(res_mkquery, :, [AC_CHECK_LIB(resolv, res_mkquery,,[
+saveLIBS="$LIBS"
+LIBS="-lresolv $LIBS"
+AC_MSG_CHECKING([if res_mkquery is provided by libresolv])
+AC_TRY_LINK([#include <resolv.h>],[res_mkquery(0,NULL,0,0,NULL,0,NULL,NULL,0);],[AC_DEFINE(HAVE_RES_MKQUERY,1,[Define if your libresolv provides res_mkquery.])
+AC_MSG_RESULT(yes)],[LIBS="$saveLIBS"
+AC_MSG_RESULT(no)])
+])])
 
 AC_CONFIG_HEADER(config.h)
 AC_OUTPUT(Makefile)