Another kFreeBSD fix.

diff --git a/configure b/configure
index 80dc53f575981303a0827d5babc04145439ab0cc..ce79a327ab51c353cab482a561a979c8fba1085a 100755 (executable)
--- a/configure
+++ b/configure
@@ -233,6 +233,7 @@ linux)
        echo "LDADD+=           -lrt" >>$CONFIG_MK
        ;;
 kfreebsd)
+       echo "CPPFLAGS+=        -D_GNU_SOURCE" >>$CONFIG_MK
        echo "SRCS+=            bpf.c if-bsd.c platform-bsd.c" >>$CONFIG_MK
        echo "COMPAT_SRCS+=     compat/linkaddr.c" >>$CONFIG_MK
        echo "LDADD+=           -lrt" >>$CONFIG_MK