* make/check.make: Skip if CC is not set. * make/check-mlibc.make: New file. * scaffold/scaffold.make: Use it for mlibc targets. * tinycc/tinycc.make: Skip mlibc targets if CC32 not set.
* make/check-tinycc.make: New file. * tinycc/tinycc.make: New file. * GNUmakefile (SUBDIRS): Add tinycc.