build: add CONFIG_LINUX

So I can add a tap-linux.c and use CONFIG_LINUX to pull it in
in Makefile

Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/configure b/configure
index 6b4faf6e76..b9fc32bee2 100755
--- a/configure
+++ b/configure
@@ -1897,6 +1897,10 @@ else
   echo "CONFIG_POSIX=y" >> $config_host_mak
 fi
 
+if test "$linux" = "yes" ; then
+  echo "CONFIG_LINUX=y" >> $config_host_mak
+fi
+
 if test "$darwin" = "yes" ; then
   echo "CONFIG_DARWIN=y" >> $config_host_mak
 fi