Bundle with GeoIP classic library and add geoip_classic placeholder.

This library we can safely bundle because it is GPLv2.

autoconf/m4/unreal.m4

@@ -312,3 +312,70 @@ else
 	AC_MSG_RESULT([no])
 fi
 ])
+
+dnl For geoip-api-c
+AC_DEFUN([CHECK_GEOIP_CLASSIC],
+[
+	AC_ARG_ENABLE(geoip_classic,
+	[AC_HELP_STRING([--enable-geoip-classic=no/yes],[enable GeoIP Classic support])],
+	[enable_geoip_classic=$enableval],
+	[enable_geoip_classic=no])
+
+	AS_IF([test "x$enable_geoip_classic" = "xyes"],
+	[
+		dnl First see if the system provides it
+		has_system_geoip_classic="no"
+		PKG_CHECK_MODULES([GEOIP_CLASSIC], [geoip >= 1.6.0],[has_system_geoip_classic=yes
+		AS_IF([test "x$PRIVATELIBDIR" != "x"], [rm -f "$PRIVATELIBDIR/"libGeoIP.*])],[has_system_geoip_classic=no])])
+
+		dnl Otherwise fallback to our own..
+		AS_IF([test "$has_system_geoip_classic" = "no"],[
+			dnl REMEMBER TO CHANGE WITH A NEW GEOIP LIBRARY RELEASE!
+			geoip_classic_version="1.6.12"
+			AC_MSG_RESULT(extracting GeoIP Classic library)
+			cur_dir=`pwd`
+			cd extras
+			dnl remove old directory to force a recompile...
+			dnl and remove its installation prefix just to clean things up.
+			rm -rf GeoIP-$geoip_classic_version geoip-classic
+			if test "x$ac_cv_path_GUNZIP" = "x" ; then
+				tar xfz geoip-classic.tar.gz
+			else
+				cp geoip-classic.tar.gz geoip-classic.tar.gz.bak
+				gunzip -f geoip-classic.tar.gz
+				cp geoip-classic.tar.gz.bak geoip-classic.tar.gz
+				tar xf geoip-classic.tar
+			fi
+			AC_MSG_RESULT(configuring GeoIP Classic library)
+			cd GeoIP-$geoip_classic_version
+			save_cflags="$CFLAGS"
+			CFLAGS="$orig_cflags"
+			export CFLAGS
+			./configure --prefix=$cur_dir/extras/geoip-classic --libdir=$PRIVATELIBDIR --enable-shared --disable-static || exit 1
+			CFLAGS="$save_cflags"
+			AC_MSG_RESULT(compiling GeoIP Classic library)
+			$ac_cv_prog_MAKER || exit 1
+			AC_MSG_RESULT(installing GeoIP Classic library)
+			$ac_cv_prog_MAKER install || exit 1
+			GEOIP_CLASSIC_CFLAGS="-I$cur_dir/extras/geoip-classic/include"
+			AC_SUBST(GEOIP_CLASSIC_CFLAGS)
+			GEOIP_CLASSIC_LIBS=
+			dnl See c-ares's compilation section for more info on this hack.
+			dnl ensure that we're linking against the bundled version
+			dnl (we only reach this code if linking against the bundled version is desired).
+			AS_IF([test -n "$ac_cv_path_PKGCONFIG"],
+			       [GEOIP_CLASSIC_LIBS="`$ac_cv_path_PKGCONFIG --libs geoip.pc`"])
+			dnl For when pkg-config isn't available
+			AS_IF([test -z "$GEOIP_CLASSIC_LIBS"],
+			       [GEOIP_CLASSIC_LIBS="-L$PRIVATELIBDIR -lGeoIP"])
+			cd $cur_dir
+		])
+		
+		AC_SUBST(GEOIP_CLASSIC_LIBS)
+		AC_SUBST(GEOIP_CLASSIC_CFLAGS)
+
+		GEOIP_CLASSIC_OBJECTS="geoip_classic.so"
+		AC_SUBST(GEOIP_CLASSIC_OBJECTS)
+	]) dnl AS_IF(enable_geoip_classic) 
+])
+