add mng option to configure script

Rules.make.in

@@ -34,8 +34,9 @@ TOOLLIBS=$(XLDFLAGS) -lpng -lz -lm @EXTRA_LIBS@ @THREAD_LIBS@ -L/usr/local/lib \
 
 STRATAGUS_LIBS= -lpng -lz -lm \
 	@EXTRA_LIBS@ @VIDEO_LIBS@ @THREAD_LIBS@ $(CCLLIB) $(COMP_LIBS) \
-	@FLAC_LIBS@ @OGG_LIBS@ @MAD_LIBS@ @MIKMOD_LIBS@ @CDAUDIO_LIBS@ \
-	@LUA_LIBS@ @STATIC_LDFLAGS@ -lz -lm -L/usr/local/lib
+	@FLAC_LIBS@ @OGG_LIBS@ @MNG_LIBS@ @MAD_LIBS@ @MIKMOD_LIBS@ \
+	@CDAUDIO_LIBS@ @LUA_LIBS@ @STATIC_LDFLAGS@ \
+	-lz -lm -L/usr/local/lib
 
 DISTLIST=$(TOPDIR)/distlist
 TAGS=$(TOPDIR)/src/tags
@@ -52,8 +53,8 @@ IFLAGS=	-I$(TOPDIR)/src/include $(XIFLAGS) -I$(TOPDIR)/src/movie/vp31/include
 CFLAGS=@EXTRA_CFLAGS@ @PROFILE_CFLAGS@ @DEBUG_CFLAGS@ $(IFLAGS) \
     -DUSE_HP_FOR_XP -DMAP_REGIONS \
     @PROFILE_CFLAGS@ @DEBUG_CFLAGS@ @VIDEO_CFLAGS@ @BZ2_CFLAGS@ \
-    @OGG_CFLAGS@ @MAD_CFLAGS@ @FLAC_CFLAGS@ @CDAUDIO_CFLAGS@ \
-    @MIKMOD_CFLAGS@ @LUA_CFLAGS@ $(CCL) \
+    @OGG_CFLAGS@ @MNG_CFLAGS@ @MAD_CFLAGS@ @FLAC_CFLAGS@ \
+    @CDAUDIO_CFLAGS@ @MIKMOD_CFLAGS@ @LUA_CFLAGS@ $(CCL) \
     $(COMP_CFLAGS) @PLATFORM@ \
     -I/usr/local/include -I/usr/X11R6/include
 

configure.in

@@ -190,6 +190,22 @@ AC_SUBST(MIKMOD_CFLAGS)
 AC_SUBST(MIKMOD_LIBS)
 dnl ----------------------------
 
+dnl --- CHECK FOR MNG LIB ------
+AC_ARG_WITH(mng,
+    [  --with-mng		  [Use mng (default: no)]], MAD="$with_mng")
+MNG_CFLAGS=
+MNG_LIBS=
+if test "$MNG" != "yes"; then
+    MNG_CFLAGS=""
+    MNG_LIBS=""
+else
+    MNG_CFLAGS="-DUSE_MNG"
+    MNG_LIBS="-lmng"
+fi
+AC_SUBST(MNG_CFLAGS)
+AC_SUBST(MNG_LIBS)
+dnl ----------------------------
+
 dnl --- CHECK FOR MAD LIB ------
 AC_ARG_WITH(mad,
     [  --with-mad		  [Use mad mp3 (default: no)]], MAD="$with_mad")