build: configure: Allow to disable support for libgeoip and zlib

Allow users to explicitely disable linking against libgeoip and zlib, as
they are completely optional, e.g:

  DISABLE_GEOIP=1 ./configure && make
  DISABLE_ZLIB=1 ./configure && make

This change should also help to increase build coverage once we use
these options in the Travis CI setup.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 10 insertions, 0 deletions

diff --git a/configure b/configure
index 067b675..105b1ec 100755
--- a/configure
+++ b/configure
@@ -333,6 +333,11 @@ check_libgeoip()
 {
 	echo -n "[*] Checking libGeoIP ... "
 
+	if [ "$DISABLE_GEOIP" == "1" ] ; then
+		echo "[DISABLED]"
+		return
+	fi
+
 	cat > $TMPDIR/geoiptest.c << EOF
 #include <GeoIP.h>
 #include <GeoIPCity.h>
@@ -397,6 +402,11 @@ check_zlib()
 {
 	echo -n "[*] Checking libz ... "
 
+	if [ "$DISABLE_ZLIB" == "1" ] ; then
+		echo "[DISABLED]"
+		return
+	fi
+
 	cat > $TMPDIR/ztest.c << EOF
 #include "zlib.h"