Allow sharing of common code between different hints files
through use of: #-INCLUDE
new folder created: sys/unix/hints/include
new hints include files:
sys/unix/hints/include/multiw-1.2020
sys/unix/hints/include/multiw-2.2020
structure the early parts of sys/unix/hints/linux.2020 and
sys/unix/hints/macOS.2020 consistently, and utilize #-INCLUDE multiw-1.2020
and #-INCLUDE multiw-2.2020 in them. That will allow the Makefile lines
that they contain to be maintained in a single place.
Started out removing some trailing spaces and ended up making various
substantive changes.
Don't include tty by default since the sample make command shows how
to enable it and there isn't any easy way to disable it other than
not requesting it to begin with. (Due to using defined/not-defined
rather than values in the 'if' directives, WANT_WIN_TTY=0 is the same
as WANT_WIN_TTY=1 rather than it's inverse.)
That resulted in all the interfaces starting commented out, so add
some make code to make sure that at least one is enabled. If none,
it silently enables tty.
The sequence
|CXX=compilerA
|LINK=$(CXX)
|#CXX=compilerB
wouldn't work if 'make' substitutes immediately (I can't recall
offhand whether it does) and the first CXX was commented out in
order to uncomment the second one. The default CXX value would be
used instead of the #CXX=foo one even if it was uncommented. Just
move LINK= after it.
Build logic has been tested. Final install and packaging for
distribution have not (but weren't touched so shouldn't be affected).
Assuming you have the prerequisite packages, You can specify the
window ports to include on the make command line:
make WANT_WIN_QT=1 WANT_WIN_X11=1 WANT_WIN_CURSES=1 WANT_WIN_TTY=1 all
Prequisites for window ports beyond tty:
(some sample homebrew commands to obtain them shown but that is not the
only way):
xquartz for x11 support
brew install xquartz
Qt for Qt support
brew install Qt
