* Provide build_type variant for Metis.
+ Ideally, we would make Metis a CMakePackage, but `metis@:5` doesn't use CMake.
+ For now, provide a `build_type=` variant similar what is found in
CMakePackage.
+ There is a potential for duplicate specification of `CMAKE_BUILD_TYPE` if both
variants `+debug` and `build_type=` are specified. I am looking for advice on
how this can be resolved.
* Update metis recipe in response to flake8 and user comments.
+ Wrap comment lines that used more than 80 columns.
+ Change `+debug` variant to avoid potential for multiple `-DCMAKE_BUID_TYPE=`
arguments provided to cmake. Specifying this variant no longer appends this
configure option. However, if `+debug` is specified, require
`build_type=Debug` to maintain expected behavior.
* For metis, remove +debug variant; use build_type= instead.
+ Update recipe for metis@4 to extract `build_type=` values and set `OPTFLAGS`
accordingly.
+ For metis@5:, the behavior from the previously supported variant `+debug` can
be obtained with the options `+gdb build_type=Debug`
* Conflicts added for metis@4 when build_type != Release|Debug.
* Use spack function conflicts instead of 'raise InstallError'.
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