Undefined symbol error when compiling in Travis CI only

Environments
1

Currently working on a new features for a gem (etscrivner/rbsecp256k1). The pull request is here.

I’ve compiled this gem personally on Linux (Ubuntu 18.10), macOS (10.14), and also compiled it under a Docker image with Ubuntu with no problems.

However, every time I attempt to compile and run it on Travis CI instances it fails with the following error:

undefined symbol: __gmpn_set_str

This seems to be related to libgmp, however libgmp10 is absolutely installed as are its development dependencies (libgmp-dev). This seems to break in this way nowhere else but on Travis CI. Any ideas what’s happening here? Seems to fail across the board in this fashion and I cannot seem to reproduce.

2

Alright, so at least part of the problem seems to be that Travis CI is (by default) installing a 6 year old version of libgmp rather than a more recent version. I assume this is required by some other pre-installed dependency. Any way to force an update here?

3

Use Xenial. https://docs.travis-ci.com/user/reference/xenial

4

Thanks! Testing this now :smiley:

5

Alright, that fixed for Linux. But now I’m seeing the same issue on macOS.

6

That’s an issue with whatever package manager (Homebrew is our default on the Mac) you are using.

7

Indeed, I think your first response provided most of the answer. I’ve since been able to fix this for macOS as well. Thank you again!