+
+case "$host_os" in
+*cygwin*)
+ AC_DEFINE_UNQUOTED(CYGWIN,1,[This is a Cygwin system])
+ AC_DEFINE_UNQUOTED(WINDOWS,1,[This is a Windows system])
+ ;;
+*mingw*)
+ AC_DEFINE_UNQUOTED(MINGW,1,[This is a MinGW system])
+ AC_DEFINE_UNQUOTED(WINDOWS,1,[This is a Windows system])
+ AC_CHECK_HEADER(winsock2.h, , [AC_MSG_ERROR([** MinGW and no winsock2.h. I give up.])])
+ LIBS="$LIBS -lws2_32 -liphlpapi"
+ is_mingw="yes"
+ ;;
+*)
+ ;;
+esac
+
+AM_CONDITIONAL([MINGW], [test "$is_mingw" = "yes"])
+
+AC_CONFIG_SUBDIRS([librb])