It seems that 3.4.2 includes a change that is supposed to fix parallel
builds (https://lists.gnu.org/archive/html/bug-bison/2019-08/msg00000.html).
Instead, it actually breaks it for me (with -j48) with errors such as:
```
mv: cannot stat 'examples/c/reccalc/scan.stamp.tmp': No such file or directory
Makefile:9323: recipe for target 'examples/c/reccalc/scan.stamp' failed
```
* Ace package. Initial commit
* Correcting header now with licence.
* Using sha256
* Making requested changes:removing import line, urls and checksums in one line, and making it an MakefilePackage.
* Removing extra line
This PR ensures that environment activation sets all environment variables set by the equivalent `module load` operations, except that the spec prefixes are "rebased" to the view associated with the environment.
Currently, Spack blindly adds paths relative to the environment view root to the user environment on activation. Issue #12731 points out ways in which this behavior is insufficient.
This PR changes that behavior to use the `setup_run_environment` logic for each package to augment the prefix inspections (as in Spack's modulefile generation logic) to ensure that all necessary variables are set to make use of the packages in the environment.
See #12731 for details on the previous problems in behavior.
This PR also updates the `ViewDescriptor` object in `spack.environment` to have a `__contains__` method. This allows for checks like `if spec in self.default_view`. The `__contains__` operator for `ViewDescriptor` objects checks whether the spec satisfies the filters of the View descriptor, not whether the spec is already linked into the underlying `FilesystemView` object.
Boost iostream autodetects the compression libraries libzstd and
liblzma outside of the Spack environment.
This commit disables mentioned libraries. In the future if the
Spack zstd/lzma packages were added as dependencies of the Spack
Boost package, additional work could be done to build Boost with
the Spack-built versions of these libraries.
For some reason, newer versions of qt fail to build because they cannot
find certain system libraries such as libatomic and libdl.
Leaving the qmake compiler set to gcc seems to fix the problem.
Fixes#13221
