From: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
To: buildroot@busybox.net
Subject: [Buildroot] btrfs filesystem image creation using TARGET_DIR path
Date: Wed, 31 Jul 2019 14:45:16 +0200 [thread overview]
Message-ID: <20190731144516.06e94517@windsurf> (raw)
In-Reply-To: <CAP8JTaaqcBbCdoJHm5=zi0dc4NtNaq2Y=krx0UbCVz4PdB2sJw@mail.gmail.com>
Hello,
On Tue, 30 Jul 2019 18:33:52 +0530
chalil jitesh <chaliljitesh@gmail.com> wrote:
> Hi,
>
> I am trying to create a btrfs filesystem image from buildroot (buildroot
> 2019.02 version). During the btrfs image creation step in the file
> buildroot/fs/btrfs/btrfs.mk the target root file system directory path
> passed to -r option seems to be given as $(TARGET_DIR) which is pointing to
> build/buildroot-fs/btrfs/target instead of actual root file system
> directory $(BASE_TARGET_DIR) (as followed for other file system image
> creation like buildroot/fs/squashfs/squashfs.mk).
> Kindly please review if my understanding is correct or if i am mising any
> steps and if the -r option should point to $(BASE_TARGET_DIR).
> Attaching the changes done for review.
Using $(TARGET_DIR) is correct. What is the problem you are seeing ?
The way it works is the following:
- BASE_TARGET_DIR is output/target. This is where all packages install
their files that should be present on the target. During the package
build/installation, TARGET_DIR points to BASE_TARGET_DIR.
- For each filesystem image format that is enabled, a copy of the
contents of BASE_TARGET_DIR is made, in a per-filesystem directory,
output/build/buildroot-fs/<filesystem>/target
- In the code creating each filesystem image, TARGET_DIR points to
output/build/buildroot-fs/<filesystem>/target.
So, using $(TARGET_DIR) in btrfs.mk is correct.
Best regards,
Thomas Petazzoni
--
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
next prev parent reply other threads:[~2019-07-31 12:45 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-30 13:03 [Buildroot] btrfs filesystem image creation using TARGET_DIR path chalil jitesh
2019-07-31 12:45 ` Thomas Petazzoni [this message]
2019-08-01 6:49 ` chalil jitesh
2019-08-01 7:43 ` Thomas Petazzoni
2019-08-22 13:30 ` chalil jitesh
2019-08-22 16:31 ` Yann E. MORIN
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