[pacman-dev] [PATCH] makepkg: do not save fflags when creating packages

Eli Schwartz eschwartz at archlinux.org
Tue Oct 8 02:48:44 UTC 2019

On 10/7/19 10:34 PM, Allan McRae wrote:
> On 8/10/19 7:18 am, Eli Schwartz wrote:
>> This breaks reproducible builds due to encoding information specific to
>> the filesystem which was used to build the package, information which we
>> are never interested in for packaging purposes anyway.
>> It also means that attempting to extract a package file as root (or
>> fakeroot) might result in angry warnings being printed to the console by
>> bsdtar, followed by a non-zero exit code, unless the user remembers to
>> use --no-fflags during extraction. This is unpleasant UI, even if pacman
>> itself won't care about these.
> What warnings?   How would I replicate those warnings?  I am currently
> not seeing any...

An example package is the current pacman-contrib-1.2.0-2 package in
[community] -- it has the nocow attribute, because it must have been
built on a CoW-supporting filesystem.

Try extracting it using `sudo bsdtar` or `fakeroot bsdtar`, and if the
filesystem you extract it to is NOT a CoW-supporting filesystem it will

For example, it worked for me originally, because my rootfs is a BTRFS
filesystem and I extracted it to a subdirectory of $HOME, but, when I
repeated the experiment in /tmp, I got the complaints.

Eli Schwartz
Bug Wrangler and Trusted User

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 1601 bytes
Desc: OpenPGP digital signature
URL: <https://lists.archlinux.org/pipermail/pacman-dev/attachments/20191007/25f08165/attachment.sig>

More information about the pacman-dev mailing list