Issues building on linux-rhel7-power9le with Spack (GCC 10.2.0)

[stmobo]

This is a followup to flux-framework/flux-core#3133 ; after resolving that issue (which occurred while building flux-core), I immediately ran into further problems building flux-sched@master+cuda. As with the prior linked issue, I'm using GCC 10.2.0, installed via Spack, on a linux-rhel7-power9le system.

The build errors I'm getting this time seem to be within templated C++ code, so I'm not going to copy the error text in the issue body; instead, I have the Spack build log here: spack-build-out.txt

The exact spec that is failing to build is flux-sched@master%[email protected]+cuda.

[dongahn]

@stmobo: I believe this is the same issue as #300: the version of GCC you are using doesn't like some of the Boost graph code.

You should be able to work around this by adding back the lines that were removed from this commit: 24a9c53