[Reproducible-builds] Bug#806331: xz-utils: make the selected POSIX shell stable accross build environments

[Jérémy Bobbio]

Source: xz-utils
Version: 5.1.1alpha+20120614-2.1
Severity: normal
User: reproducible-builds at lists.alioth.debian.org
Usertags: environment
X-Debbugs-Cc: reproducible-builds at lists.alioth.debian.org, sanvila at debian.org

Hi!

While working on the “reproducible builds” effort [1], we have noticed
that xz-utils could not be built reproducibly.

When dash is the default shell, the configure script
m4/posix-shell.m4 will select /bin/bash as the “conforming POSIX
shell”. When bash is the default shell, /bin/sh will be selected.

The binary package currently in sid on amd64 uses /bin/bash. As bash
is currently Essential:yes (#103284), this is probably not a problem.
But I wonder if they would not be troubles if the package was built on
an environment were bash is the default shell, but later installed on a
system where /bin/dash is /bin/sh.

So for reproducibility and safety reason, it would be best if the
selected path to the shell would not depend on the build environment.

Thanks!

 [1]: https://wiki.debian.org/ReproducibleBuilds

-- 
Lunar                                .''`. 
lunar at debian.org                    : :Ⓐ  :  # apt-get install anarchism
                                    `. `'` 
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