configure: check for flex and bison

flex and bison are needed for bpfc and trafgen, so check for their
existance. If they are not present, lets remove those two from the
build in case users do not want it.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/configure b/configure
index 120d5bf..ec31bf2 100755
--- a/configure
+++ b/configure
@@ -65,6 +65,34 @@ check_ccache()
 	fi
 }
 
+check_flex()
+{
+	echo -n "[*] Checking flex ... "
+
+	if [ "x$(which flex)" == "x" ] ; then
+		echo "[NO]"
+		MISSING_DEFS=1
+		tools_remove "trafgen"
+		tools_remove "bpfc"
+	else
+		echo "[YES]"
+	fi
+}
+
+check_bison()
+{
+	echo -n "[*] Checking bison ... "
+
+	if [ "x$(which bison)" == "x" ] ; then
+		echo "[NO]"
+		MISSING_DEFS=1
+		tools_remove "trafgen"
+		tools_remove "bpfc"
+	else
+		echo "[YES]"
+	fi
+}
+
 check_nacl()
 {
 	echo -n "[*] Checking nacl ... "
@@ -511,6 +539,8 @@ if [ "$MISSING_PKG_CONFIG" == "1" ] ; then
 fi
 
 check_ccache
+check_flex
+check_bison
 check_nacl
 check_libnl
 check_tpacket_v2