The detection logic for the prefix used in py-bind11 if broken for spack
resulting in an empty prefix. However, the package provides an escape
hatch in the form of `prefix_for_pc_file`. Use this escape hatch to
provide the correct path; spack will always know better than pybind11's
CMake.
Co-authored-by: Robert Underwood <runderwood@anl.gov>
We've seen `getfqdn()` cause slowdowns on macOS in CI when added elsewhere. It's also
called by database.py every time we write the DB file.
- [x] replace the call with a memoized version so that it is only called once per process.
Signed-off-by: Todd Gamblin <tgamblin@llnl.gov>
This PR introduces a new heuristic for the solver, which behaves better when
compilers are treated as nodes. Apparently, it performs better also on `develop`,
where compilers are still node attributes.
The new heuristic:
- Sets an initial priority for guessing a few attributes. The order is "nodes" (300),
"dependencies" (150), "virtual dependencies" (60), "version" and "variants" (30), and
"targets" and "compilers" (1). This initial priority decays over time during the solve, and
falls back to the defaults.
- By default, it considers most guessed facts as "false". For instance, by default a node
doesn't exist in the optimal answer set, or a version is not picked as a node version etc.
- There are certain conditions that override the default heuristic using the _priority_ of
a rule, which previously we didn't use. For instance, by default we guess that a
`attr("variant", Node, Variant, Value)` is false, but if we know that the node is already
in the answer set, and the value is the default one, then we guess it is true.
Signed-off-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>
This includes a test_linux699 variant which "activates" a version
that pulls from a repository other than the official repository.
This version is required to work with Linux kernel version
6.9.9 or later. Future official `msr-safe` versions are expected
to support later Linux kernel versions.
