Bootstraps a build environment targeting linux with glibc 2.17 and gcc 10.

To build it run make. This outputs a container image ghcr.io/spack/x86_64_v3-linux-gnu with tag v<year>-<month>-<day>.

stage1/ contains an initial compiler for use in stage2. stage2/ defines the build environment.

We store the spack.lock files for stage1/ and stage2/. Use make reconcretize-stage1 or make reconcretize-stage2 to make changes to the build environment.

Binaries of stage1/ and stage2/ are cached in an OCI buildcache through

make push GITHUB_USER=... GITHUB_TOKEN=...

Warning

When building stage2, Spack adds a compiler definition to stage2/spack.yaml which shouldn't be commited.