Add DragonFly bootstrap support (ltsmaster)

[dkgroot]

Related PR's:

• ldc

  • ldc:ltsmaster
  • druntime:ltsmaster
    • base PR
    • /src/core/sys/posix
    • /src/core/sys/dragonflybsd
  • phobos:ltsmaster
  • dmd-testsuite:ltsmaster

• dlang:

  • dlang/dmd:master
  • dlang/druntime:master
    • dlang/druntime:master
    • dlang/druntime:master/src/core/sys/dragonflybsd
    • dlang/druntime:master/src/core/sys/posix
  • dlang/phobos:master (merged already)

[joakim-noah]

I see that you've submitted a version of this upstream also. I suggest you limit this pull to only changes you didn't need upstream, which should be easy since it's so small.

[dkgroot]

@joakim-noah Is it ok for me to leave them a little longer (until the dmd pr is accepted). That way i can run all the unittests smoothly.

[joakim-noah]

Yep, no problem, just saying what will be needed then.

[dkgroot]

@joakim-noah Everything is finally merged in (dlang) dmd, druntime and phobos (Also in part thanks to you). Now I need to figure out what needs to be backported here.

[joakim-noah]

I'll do it, just let me know if I miss anything.

[joakim-noah]

I don't really want to do it. 😝 Go ahead and update this patch to what you got merged upstream and is necessary for this branch, and I'll pull it.

[joakim-noah]

Only DragonFly PR left, would be good to get this in before the 0.17.6 release.

[dkgroot]

@joakim-noah
The Makefile needed touching up (to match the dlang/dmd/test/Makefile one). The other two changes already matched.
Thanks for merging the other PR's and helping out on this one !

[dkgroot]

Thanks a lot !!