The default library search for a package checks the lib/ and lib64/
directories for libraries before the root prefix, in order to save
time when searching for libraries provided by externals (which e.g.
may have '/usr/' as their root).
This moves that logic into the "find_libraries" utility method so
packages implementing their own custom library search logic can
benefit from it.
This also updates packages which appear to be replicating this logic
exactly, replacing it with a single call to "find_libraries".
#11528 updated Stage to always store a Package's source in a fixed
directory accessible via `Stage.source_path` This left behind a
number of packages which were expecting to access the source code
via `Stage.path`. This Updates those packages to use
`Stage.source_path` instead.
This also updates the name of the fixed directory: The original name
of the fixed directory was "src", so if an expanded archive created a
"src" directory, then users inspecting the directory structure could
see paths like "src/src" (which wasn't wrong but could be confusing).
Therefore this also updates the name of the fixed directory to
"spack-src".
- remove the old LGPL license headers from all files in Spack
- add SPDX headers to all files
- core and most packages are (Apache-2.0 OR MIT)
- a very small number of remaining packages are LGPL-2.1-only
