Example replacement:
```
'-D(\w+)(:BOOL)?=\{0\}'\.\s*format\s*\(\s*'(ON|YES|true|TRUE)' if '\+(\w+)' in (self\.)?spec else '(OFF|NO|false|FALSE)'\)
```
with
```
self.define_from_variant('\1', '\4')
```
This will cause failures if any variants were misspelled: I have already caught two packages with nonexistent variants.
- [x] add `concretize.lp`, `spack.yaml`, etc. to licensed files
- [x] update all licensed files to say 2013-2021 using
`spack license update-copyright-year`
- [x] appease mypy with some additions to package.py that needed
for oneapi.py
- 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 dmlc/mxnet packags.
* Build mxnet+cuda+opencv with GCC-4.8.5 and GCC-5.4.0.
* Build mxnet version 0.10.0, 0.10.0.post1 and 0.10.0.post2.
* Add component version constrain for mxnet 0.10.0.x .
* Go through flake8.
* Replace commit hash with commit date as package version.
* Go throught Travis-CI.
* Update submodule version for 0.10.0.post2.
* Add openmp variant for dmlc-core and mxnet.
* Refine variant handling.
* Fix filter_file for dmlc-core.
* Cut long strings into multiple lies due to PEP8 requirements.
* Fix for PEP8.
* Add CUB_INCLUDE.
* Add py-mxnet: Python binding for MXNet.
* Remove distutils.dir_util.
* Add the profiler variant for mxnet.
* Add a shared variant for nnvm.
* Set USE_OPENMP to OFF by default.
* Fix flake8 errors.
* Fix flake8 issues.
* flake8 issues again.
