CLEAN_BUILD=YES (default) - clean all, then build all
CLEAN_BUILD=NO - clean only multi-input targets (CC, OP), usually safe
CLEAN_BUILD=NEVER - no clean at all, invalid multi-input targes, but fast
Since msysGit lacks the install command, simple cp -f replacement
is provided. Don't forget to copy it into the msysGit bin subdirectory.
Introduced CLEAN_BUILD=NO make option to test packaging w/o cleaning.
Recommended for test builds only, not for production run.
make -j works great after PyMite dependency fix by commit
0005729056e0980a859a990455f4823960851449
So comment is updated as well.