linux-user: check if NETLINK_ROUTE is available

Some IFLA_* symbols can be missing in the host linux/if_link.h,
but as they are enums and not "#defines", check in "configure" if
last known  (IFLA_PROTO_DOWN) is available and if not, disable
management of NETLINK_ROUTE protocol.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/configure b/configure
index 6d01d968b8..d1dbc4b099 100755
--- a/configure
+++ b/configure
@@ -4526,6 +4526,17 @@ if compile_prog "" "" ; then
     have_fsxattr=yes
 fi
 
+have_rtnetlink=no
+cat > $TMPC << EOF
+#include <linux/rtnetlink.h>
+int main(void) {
+  return IFLA_PROTO_DOWN;
+}
+EOF
+if compile_prog "" "" ; then
+    have_rtnetlink=yes
+fi
+
 ##########################################
 # End of CC checks
 # After here, no more $cc or $ld runs
@@ -5461,6 +5472,10 @@ if test "$rdma" = "yes" ; then
   echo "CONFIG_RDMA=y" >> $config_host_mak
 fi
 
+if test "$have_rtnetlink" = "yes" ; then
+  echo "CONFIG_RTNETLINK=y" >> $config_host_mak
+fi
+
 # Hold two types of flag:
 #   CONFIG_THREAD_SETNAME_BYTHREAD  - we've got a way of setting the name on
 #                                     a thread we have a handle to