runtime errors after cross-compilation (Yocto/OpenEmbedded) about iota.go

[bernardoaraujor]

Issue fully resolved. Posting solution here if anyone ever faces similar issues.
Excerpt from https://itnext.io/getting-go-onto-internet-things-582396ff2760

Go bitbake recipes by default produce applications which link to the go runtime library. This can complicate deployment and dependency management. For these and other reasons, you may want to have Yocto build Go application as the default binary type of a completely contained application. To do this just add GO_LINKSHARED = "" to the recipe. The result is that the main RPM will have the same name, but will not require the go-runtime rpm be installed.

As suspected, the main problem was a compilation flag (linkshared in this case), which created executable dependency to go-runtime and unstable behaviour of a few libraries (such as regexp) depending on the target CPU architecture. This is probably because several additional compilation flags are also required for dynamic linking of some libraries and unfortunately BitBake does not resolve them automatically.

Btw, linkshared is marked as experimental at the official golang linking documentation, so another good reason to stay away from it.

Adding GO_LINKSHARED = "" to the BitBake recipe completely solved the issue because the linkshared flag is removed and for each application, a single standalone executable is generated without dependencies to any shared objects at runtime.

[bernardoaraujor]

Partially fixed by pointing recipe to Release v1.0.0-beta.9 (instead of 6, like I did previously).
Problem definitely has to do with regexp. For some reason, when cross-compiled with BitBake, the implementation of regexp is buggy.

I'm doing modifications similar to d40e388
I'll submit a PR soon.

Closing the issue.