Travis should build and test arm asm

[gmaxwell]

No description provided.

[gmaxwell]

Travis should also test make install.

[benma]

Related: Travis does not seem to run ./tests. Is there a reason for that?

[real-or-random]

It does, see https://travis-ci.org/bitcoin-core/secp256k1/jobs/560256756#L708 for example.
It just runs the entire testsuite using make check-TESTS. Maybe we should just update the README.

[benma]

Of course!

Updated README here: #652

[real-or-random]

Travis should also test different window size settings.

[real-or-random]

Travis has now (alpha) support for ARM:
https://blog.travis-ci.com/2019-10-07-multi-cpu-architecture-support

[elichai]

FWIW it's arm64, and we have asm only for arm, not arm64.

[laanwj]

It can build and run ARM executables on ARM64 (FWIW this is what we do in bitcoin in the ARM64 travis run, see bitcoin/bitcoin#17233)

[elichai]

Didn't know arm64 can execute arm binaries. i'll give this a try

[laanwj]

I think it's a feature that many SoCs have, including the one Travis happens to use, not a general requirement for arm64

[gmaxwell]

Even just having arm64 would be a big improvement. Sure, that wouldn't test that the arm ASM builds and works-- which is the critical thing motivating this issue, but there isn't anything blocking that as far as I know.

Similarly, there appears to be no BE host in this project's travis configuration. s390x is be, I believe. (lol)

[elichai]

CC #696

[real-or-random]

This has been solved by #930.