Allow secondary generators when building with CMake. (#9324)

CMake supports the notion of secondary generators which provide extra
information to (e.g.) IDEs over and above that normally provided by
the primary generator. Spack only supports the 'Unix Makefiles' and
'Ninja' primary generators but was not parsing out the primary
generator when a secondary generator was also included (e.g. for
a generator attribute like 'Codeblocks - Ninja'). This adds a regex
for extracting the primary generator for validation.

Since the secondary generator is irrelevant to a Spack build, it is
passed on to CMake without further validation.

0 files changed, 0 insertions, 0 deletions