Approve the addition of Mk/Uses/alias.mk

[marino]

Summary

There are many DPorts that have a one-line Makefile.DragonFly with the contents "CFLAGS+= -DFreeBSD=9" or similar.

For the purposes of reducing differences between ports and dports, I propose a new USES tool (alias) that is ignore if OPSYS == FreeBSD. It normally has no arguments, but it will accept 8,9,10, or 11 as an argument to define the major release.

Is there any heartache regarding this approach? It is pretty clean for FreeBSD I think.

[bapt]

that you will spread USES=alias over the ports tree or keep it in dports? I mean what is your plan with that new USES=alias

[marino]

Yes, I'd want to use it in ports and remove the extra files from dports.
This technique isn't used that much, we aren't talking 100's here.

[marino]

It looks like this could potentially affect ~70 ports

[bapt]

Dumb question why not adding in bsd.port.mk or anything global specific to dports unconditionnaly

FBSDVER?= 9
CFLAGS+= -D__freeBSD__=${FBSDVER}

That way only things with specific version will need a Makefile.Dragonfly with only FBSDVER=11 for example

[marino]

because defining FreeBSD on dragonfly is generally incorrect -- e.g. breaks things. It would break far more than it fixes.

[bapt]

Well we integrated things in base to help Debian/kFreeBSD I do not see why we should not help DPorts
This deserves also comments from other portmgr, I'm adding them

[bapt]

I see no objection for that one, let's wait 3 more days to give time on others to react and I will accept it if no stong objection has been raised

[marino]

Closed by commit rP371239 (authored by @marino).