+# Windows stuff
+AC_CHECK_DECL(_WIN32)
+AM_CONDITIONAL([WINDOWS], [ test "x$ac_cv_have_decl__WIN32" = "xyes" ])
+if test "x$ac_cv_have_decl__WIN32" = "xyes" ; then
+ CPPFLAGS="$CPPFLAGS -I`pwd`/src/compat/windows/include"
+fi
+AC_CHECK_MEMBER([struct in_pktinfo.ipi_spec_dst],
+ AC_DEFINE([HAVE_IPI_SPEC_DST], [], [struct in_pktinfo has ipi_spec_dst member]),
+ [],
+ [[#include <netinet/in.h>]])
+