debian: Apply hardening options to build.

Debian now encourages building every program with various GCC hardening
options.  This commit implements that recommendation for Open vSwitch.

See https://wiki.debian.org/Hardening for details.

Found by lintian.

Signed-off-by: Ben Pfaff <blp@nicira.com>

diff --git a/debian/rules b/debian/rules
index 51a2e51..608f127 100755 (executable)
--- a/debian/rules
+++ b/debian/rules
@@ -39,6 +39,7 @@ configure-stamp:
                test -e Makefile || \
                ../configure --prefix=/usr --localstatedir=/var --enable-ssl \
                        --sysconfdir=/etc CFLAGS="$(CFLAGS)" \
+                       $(shell dpkg-buildflags --export=configure) \
                        $(DATAPATH_CONFIGURE_OPTS))
        touch configure-stamp