test failures on various architectures: armel, armhf, s390x, ...

[barak]

The Debian autobuilders build each package for various architectures. In the case of the perceptualdiff package, I enabled running the test script test/run_tests.bash during the build, in version 2.1-3, which includes changes beyond v2.1 up to 2a849e1 (6-Aug-2020). The tests succeed on some architectures (amd64, i386, arm64, ppc64el) but fail on others (armel, armhf, s390x).

I have no idea why. Likely something simple, like word size or endianity. Help / ideas welcome!

Details: https://buildd.debian.org/status/package.php?p=perceptualdiff

[jterrace]

We could add additional architectures to the travis.yml file to try to repro:
https://docs.travis-ci.com/user/multi-cpu-architectures/

[barak]

That sounds very sensible. I doubt it's anything Debian-specific.

[barak]

(Although the Debian build scripts don't use the Makefile, they use cmake directly, mainly because going via the Makefile caused the executable to be installed in /usr/local/bin/ and I didn't feel like tracking down the issue.)

[barak]

I just pushed a suitable added stanza to travis on the master branch of my fork.