tree bc7b92c1e60eb531c75960d460a8d5beaf6ff8da
parent b2ef62bafcff3a31662301ada6c8e525a2cc8b27
author Jeremy Kerr <jk@ozlabs.org> 1559033343 +0800
committer Jeremy Kerr <jk@ozlabs.org> 1559222760 +0800

Rework conditional feature usage

Currently, the infrastructure that we have to enable a flexible
compilation environment has a few issues:

 - the allocator configuration is performed at run-time, while the log
   configuration is performed at compile-time

 - for a standard compile (ie, standard userspace, using
   autoconf+automake to build), we need a few pre-defined configuration
   options.

This change adds a bit of runtime selection to the logging
infrastructure, to match the allocator setup. We also unify the
compile-time defines into config.h, using MCTP_-prefixed macro names,
allowing integration into other build systems.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>