diff -ru cloop-2.01/Makefile cloop-2.01.new/Makefile
--- cloop-2.01/Makefile	2004-05-14 14:17:51.000000000 -0500
+++ cloop-2.01.new/Makefile	2004-07-21 16:26:59.167257880 -0500
@@ -1,18 +1,51 @@
 #!/usr/bin/make
 
-KERNEL_DIR=/usr/src/linux
+KVERSION=$(shell uname -r)
+MACHINE=$(shell uname -m)
+KERNEL_DIR=/lib/modules/$(KVERSION)/build
+KERNEL_INCLUDE=$(KERNEL_DIR)/include
+INCLUDE_26:=-include $(KERNEL_INCLUDE)/config/modversions.h -include $(KERNEL_INCLUDE)/linux/version.h
+INCLUDE_24:=-include $(KERNEL_INCLUDE)/linux/modversions.h
+
+file_exist=$(shell test -f $(1) && echo yes || echo no)
+
+# test for 2.6 or 2.4 kernel
+ifeq ($(call file_exist,$(KERNEL_DIR)/Rules.make), yes)
+PATCHLEVEL:=4
+else
+PATCHLEVEL:=6
+endif
 
 ifdef APPSONLY
 CFLAGS:=-Wall -Wstrict-prototypes -Wno-trigraphs -O2 -s -I. -fno-strict-aliasing -fno-common -fomit-frame-pointer 
 else
-include $(KERNEL_DIR)/.config
+ifeq ($(PATCHLEVEL),4)
 include $(KERNEL_DIR)/conf.vars
+else
+include $(KERNEL_DIR)/.config
+endif
 endif
 
 CKERNOPS:=-D__KERNEL__ -DMODULE -fno-builtin -nostdlib -DKBUILD_MODNAME="cloop" -DKBUILD_BASENAME="cloop"
 
+# I needed this for my amd64 system running 2.6.7
+# it maybe required for 2.6, so I add it here
+ifeq ($(PATCHLEVEL),6)
+CKERNOPS+= -D__OPTIMIZE__
+endif
+
+# check for amd64
+ifeq ($(MACHINE),x86_64)
+CKERNOPS+=-mno-red-zone -mcmodel=kernel
+endif
+
 ifdef CONFIG_MODVERSIONS
-MODVERSIONS:= -DMODVERSIONS -include $(KERNEL_DIR)/include/linux/modversions.h
+MODVERSIONS:= -DMODVERSIONS
+ifeq ($(PATCHLEVEL),4)
+MODVERSIONS+=$(INCLUDE_24)
+else
+MODVERSIONS+=$(INCLUDE_26)
+endif
 CKERNOPS += $(MODVERSIONS)
 endif
 
diff -ru cloop-2.01/advancecomp-1.9_create_compressed_fs/advfs.cc cloop-2.01.new/advancecomp-1.9_create_compressed_fs/advfs.cc
--- cloop-2.01/advancecomp-1.9_create_compressed_fs/advfs.cc	2004-04-18 15:33:29.000000000 -0500
+++ cloop-2.01.new/advancecomp-1.9_create_compressed_fs/advfs.cc	2004-07-20 11:55:28.000000000 -0500
@@ -30,6 +30,7 @@
 #include "utility.h"
 #include "compress.h"
 #include "siglock.h"
+#define __OPTIMIZE__
 #include <netinet/in.h>
 
 #include "lib/mng.h"