undeclared inclusion(s) for stdlib about toolchains_llvm

[siddharthab]

I have pushed a new tag (0.5.6) which has this fix.

[siddharthab]

The error message you are getting is because something is missing in the declared builtin include paths. I think we need to add a lib64 directory in addition to the lib directory in these two places:
https://github.com/grailbio/bazel-toolchain/blob/f2d0aeca399e70297414341d228c7be460b4d6a0/toolchain/cc_toolchain_config.bzl.tpl#L504
https://github.com/grailbio/bazel-toolchain/blob/f2d0aeca399e70297414341d228c7be460b4d6a0/toolchain/cc_toolchain_config.bzl.tpl#L514

This could be independent of whether you are using absolute paths or not.

If you are familiar with how to test changes to external repos, can you test it and see if it resolves your problems? I am afraid I am not able to reproduce your issue easily.

As an aside, do you find the absolute paths feature useful? It has been a while since the feature was originally introduced, and there have been improvements in bazel sandbox since, so I was thinking of removing the feature.

[rockwotj]

@siddharthab Thanks for the speedy reply! I actually only use the absolute paths because without it https://github.com/bazelbuild/rules_foreign_cc/ does not work (I think it runs stuff from a different directory so the paths are incorrect).

Let me add in those patches and test

[rockwotj]

@siddharthab your suggestion to add lib64 worked! 🎊

[siddharthab]

Awesome! Can you send a PR?