* Add a variant for tests and parallelize builds
- Fix a bug with boost defaulting to cxxstd=98 when cxxstd=11 is the
minimum for hpx
- Disable tests by default and use a variant to enable them if requested
- Enable parallel builds: each process takes up to 1Gb when tests are
not enabled.
* Remove tests variant
- The variant doesn't change what gets installed. Testing can be
activated using `spack install --test=root hpx`
* Add master branch as version to HPX package
* Remove C++98 option from HPX package
* Add option to turn off examples in HPX package
* Add MPI variant to HPX package
We'd like to use a consistent checksum scheme everywhere so that we can:
a) incorporate archive checksums into our specs and have a
consistent hashing algorithm across all specs.
b) index mirrors with a consistent type of checksum, and not one that
is dependent on how spack packages are written.
- [x] convert existing md5, sha224, sha512, sha1 checksums to sha256
* added latest versions + malloc variant
* added a variant to activate different instrumentations
* added a variant to activate or not networking
* added a variant to activate or not cuda and tools
* enforce c++ standard and make it consistent with boost
- 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
* Add universal build_type variant to CMakePackage
* Override build_type in some packages with different possible values
* Remove reference to no longer existent debug variant
* Update CBTF packages with new build_type variant
* Keep note on build size of LLVM
