build error: fs/aufs/Makefile:5: fs/aufs/conf.mk: No such file or directory

[JKDingwall]

Hi,

I'm patching aufs-standalone aufs6.8 branch on to the Ubuntu 6.8-hwe tree for Ubuntu jammy. During the build of the 'binary-arch' target I encountered this error:

/build/slowfs/build/ubuntu/fs/aufs/Makefile:5: fs/aufs/conf.mk: No such file or directory
make[6]: *** No rule to make target 'fs/aufs/conf.mk'.  Stop.
make[5]: *** [/build/slowfs/build/ubuntu/scripts/Makefile.build:481: fs/aufs] Error 2
make[4]: *** [/build/slowfs/build/ubuntu/scripts/Makefile.build:481: fs] Error 2
make[4]: *** Waiting for unfinished jobs....

Applying this change to the fs/aufs/Makefile appears to have resolved the problem but I don't know if it is the correct solution.

diff --git a/fs/aufs/Makefile b/fs/aufs/Makefile
index 4af8ecde3e3fa..9111fe31039c6 100644
--- a/fs/aufs/Makefile
+++ b/fs/aufs/Makefile
@@ -1,10 +1,10 @@
 # SPDX-License-Identifier: GPL-2.0

-include ${src}/magic.mk
+include $(srctree)/$(src)/magic.mk
 ifeq (${CONFIG_AUFS_FS},m)
-include ${src}/conf.mk
+include $(srctree)/$(src)/conf.mk
 endif
--include ${src}/priv_def.mk
+-include $(srctree)/$(src)/priv_def.mk

 # cf. include/linux/kernel.h
 # enable pr_debug
@@ -13,7 +13,7 @@ ccflags-y += -DDEBUG
 ifdef M
 ccflags-y += -include ${M}/../../include/uapi/linux/aufs_type.h
 else
-ccflags-y += -include ${srctree}/include/uapi/linux/aufs_type.h
+ccflags-y += -include $(srctree)/include/uapi/linux/aufs_type.h
 endif

 obj-$(CONFIG_AUFS_FS) += aufs.o

[sfjro]

Hello,

JKDingwall:

I'm patching aufs-standalone aufs6.8 branch on to the Ubuntu 6.8-hwe tree for Ubuntu jammy. During the build of the 'binary-arch' target I encountered this error:

I'm afraid your kernel has added some unknown changes from plain linux v6.8. Could you try digging the log by git-log or something, especially for linux/Makefile and linux/scripts?

Is your kernel from https://git.launchpad.net/~canonical-kernel/ubuntu/+source/linux-nvidia-hwe/+git/noble ?

J. R. Okajima

[JKDingwall]

Hi,

Thank you for the quick response:) I'm working with tag Ubuntu-hwe-6.8-6.8.0-40.40_22.04.1 from https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/jammy. I was unfamiliar with the ${...} variable syntax in Makefiles but I see in the documentation that is equivalent to $(...).

git diff v6.8..Ubuntu-hwe-6.8-6.8.0-40.40_22.04.1 -- Makefile scripts does show some differences but nothing obviously stands out. I think the main difference is that the Debian build scripts use a separate build path rather than the root of the source tree. This git ls-files | grep /Makefile$ | xargs git grep "^include " shows that many include statements are prefixed $(srctree).

[sfjro]

JKDingwall:

I'm patching aufs-standalone aufs6.8 branch on to the Ubuntu 6.8-hwe tree for Ubuntu jammy. During the build of the 'binary-arch' target I encountered this error:

Compiling aufs-standalone.git is expected to use its own Makefile. And Makefile sets KDIR variable (generally you can set KDIR manually on the command line). Currently I guess the cause of your error is related to this KDIR variable. But if your build system doesn't support setting a make-variable, it may not be effective.

Instead of aufs-standalone.git, using aufs-linux.git may be better for your system, such as

(from aufs README file)

Or You may want to directly git-pull aufs into your linux GIT tree, and leave the patch-work to GIT. $ cd /your/linux/git/tree $ git remote add aufs git://github.com/sfjro/aufs-linux.git $ git fetch aufs $ git checkout -b my6.0 v6.0 $ (add your local change...) $ git pull aufs aufs6.0

• now you have v6.0 + your_changes + aufs6.0 in you my6.0 branch.

• you may need to solve some conflicts between your_changes and aufs6.0. in this case, git-rerere is recommended so that you can solve the similar conflicts automatically when you upgrade to 6.1 or later in the future.

This git work may look rather big to you since you already have a simple solution adding ${srctree}. Yes, I think it a good solution for your system.

J. R. Okajima