- 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
* Changed every 'fpic' variant to 'pic'. fixes#2463
Every variant that activates compilation of position independent code
has been changed to 'pic'. Hardcoded compiler flags in packages have
been substituted with `self.compiler.pic_flag`.
* Changed literal uses of '-fpic' to 'self.compiler.pic_flag'
* Adding Nalu package.
* Fixing flake8 stuff.
* Fixing flake8 stuff.
* Reorganizing trilinos package file a little to make it less verbose.
* Reorganizing trilinos package file for more general use as well as use as a dependency of the Nalu package. Setting fpic as default for yaml-cpp and superlu.
* Explicitly stating fpic variants in dependent packages.
* Updating nalu and trilinos package files with suggested changes.
* Fixing formatting issues. Making suggested changes.
* Fixing formatting.
* Reducing amount of explicit variants in Nalu. Adding suggested changes to Trilinos package file.
* Making suggested changes to Nalu package.
* Turning off superlu-dist variant.
* Cleaning up yaml-cpp file.
* Fixing pnetcdf requirements in trilinos.
* inheritance of directives: using meta-classes to inject attributes coming from directives into packages + lazy directives
* _dep_types -> dependency_types
* using a meta-class to inject directives into packages
* directives are lazy
fixes#2466
* directives.py: allows for multiple inheritance. Added blank lines as suggested by @tgamblin
* directives.py: added a test for simple inheritance of directives
* Minor improvement requested by @tgamblin
CMakePackage: importing names from spack.directives
directives: wrap __new__ to respect pep8
* Refactoring requested by @tgamblin
directives: removed global variables in favor of class variables. Simplified the interface for directives (they return a callable on a package or a list of them).
yaml-cpp has a boost dependency, and according to [yaml-cpp
page](https://github.com/jbeder/yaml-cpp):
yaml-cpp 0.5.3 has been released! This is a bug fix release. It also
will be the last release that uses Boost; futures releases will require
C++11 instead.
