* config/darwin/clang.mk
+ Added comment with option to force C++ mode with clang.
* utils/hbmk2/hbmk2.prg
+ Added (not yet tested) darwin/clang support.
Probably it could be added for other platforms, too. Also
for GNU Make. clang cmdline is compatible with GCC for the most
part, so it's easy to do and if the few differences can be sorted out,
it can be done without duplicating .mk file logic.
* config/darwin/gcc.mk
- Disabled '-no-cpp-precomp' option for darwin/gcc. Most probably
it's not needed anymore. For users using older darwin systems, this
can be added manually.