EXT4 specific changes done.

os/imagezip/GNUmakefile.in

@@ -11,7 +11,7 @@ SUBDIR		= os/imagezip
 DISTFILES	= global.h imagehdr.h queue.h sliceinfo.h \
 		  imagedump.c imagedump.8 imagezip.c imagezip.8 \
 		  imageunzip.c crc.c disksize.c imageunzip.8 \
-		  extfs/*.[hc] fat/*.[hc] ffs/*.[hc] ntfs/*.[hc] shd/*.[hc] \
+		  extfs/*.[hc] ext4fs/*.[hc] fat/*.[hc] ffs/*.[hc] ntfs/*.[hc] shd/*.[hc] \
 		  hashmap/*.[hc]
 
 EXPANDCOPYRIGHT	= /usr/site/lib/copyright/expand-copyr
@@ -62,6 +62,7 @@ WITH_EXTFS	= 1
 WITH_NTFS	= @WINSUPPORT@
 WITH_FAT	= @WINSUPPORT@
 WITH_HASH	= 1
+WITH_EXT4FS	= 0
 
 include $(OBJDIR)/Makeconf
 
@@ -107,6 +108,13 @@ SUBDIRS		+= extfs
 ZIPLIBS		+= extfs/libextfs.a
 endif
 
+# EXT4
+ifeq ($(WITH_EXT4FS),1)
+CFLAGS		+= -DWITH_EXT4FS
+SUBDIRS		+= ext4fs
+ZIPLIBS		+= ext4fs/libext4fs.a
+endif
+
 # with NTFS
 ifeq ($(WITH_NTFS),1)
 ifndef HAVE_GCC3
@@ -186,7 +194,7 @@ imagehash: imagehash.o version.o
 imagehash.o:	imagehash.c
 	$(CC) -c $(HASHCFLAGS) -o imagehash.o $<
 
-ffs extfs ntfs fat shd hashmap:
+ffs extfs ext4fs ntfs fat shd hashmap:
 	@$(MAKE) SUBDIRCFLAGS="$(SUBDIRCFLAGS)" -C $@ all
 
 imagezip.o: sliceinfo.h imagehdr.h global.h