[Reproducible-builds] Bug#787265: libwx-perl: please make the build reproducible

[Reiner Herrmann]

Source: libwx-perl
Version: 1:0.9923-4
Severity: wishlist
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: randomness
X-Debbugs-CC: reproducible-builds at lists.alioth.debian.org

Hi!

While working on Debian's “reproducible builds” effort [1], we have
noticed that libwx-perl doesn't build reproducibly.
One issue is that some files generated during build contain lines in
random order.
The attached patch fixes this by sorting the results.

There is also another issue. .c/.h files generated during build
with ExtUtils::ParseXS (xsubpp) are also undeterministic, which
leads to differing .so files, also shown in the diff [2].
But this problem has to be solved in the ParseXS module, not in this
package.


Regards,
 Reiner

[1]: https://wiki.debian.org/ReproducibleBuilds
[2]: https://reproducible.debian.net/rb-pkg/unstable/amd64/libwx-perl.html
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