On Monday, 18 April 2016 at 15:15:26 UTC, Atila Neves wrote:
Here's[1] another attempt at converting the Makefile for POSIX
systems to D using reggae[2]. I first tried my hand at writing
a parser for Makefiles using Pegged and machine translating to
D. I learned a lot about parsing and GNU make in the process
and also that:
1. It was about two orders of magnitude more work than I
thought to support the subset of GNU make used by posix.mak
2. The generated D code wasn't exactly pretty
I concluded that worse is better and hand translated all of
posix.mak instead. It isn't as pretty as possible either, but
that's on purpose - since I'll have to mentally apply any
further diffs and hand translate, I tried to make it as close
as possible to the existing Makefile. That way the edits should
be obvious.
AFAICT by testing manually, it does everything that the
original Makefile does, including all the different unit test
targets and documentation. Then again, I only tested on Linux.
I've been trying to bend the auto-tester to my will to make
sure all posix.mak systems are still green but I ran into
configuration issues.
I'll carry on maintaining the D description as updates to
posix.mak happen for a year. If we haven't switched by then we
probably never will.
To try it out yourself, get & build/run reggae from dub in this
branch at the root dir of phobos selecting the backend of
choice with `-b <backend>`. I suggest the binary one since one
of the points of this is to remove dependencies from other
build systems. Then run make/ninja/tup/./build with the same
targets as usual. If that doesn't work... open an issue on
github.
Destroy!
Atila
[1]
https://github.com/atilaneves/phobos/blob/reggae/reggaefile.d
[2] https://github.com/atilaneves/reggae
Phobos posix.mak in D:
https://github.com/atilaneves/phobos/blob/new_reggae/reggaefile.d
I've given up on making it look like the makefile for maintenance
reasons and tried to write it "properly". At the end of the day,
that phobos posix.mak just does a lot of stuff so even though I
tried getting rid of cruft it's still rather large.
Notice however how there are no explicit listings of packages or
converting them or anything like that. This isn't the best I can
do, but it was a lot of work already so I thought I'd share.
This new attempt does everything posix.mak at that point in time
did except for running unit tests per package. I think that's the
test runner's job anyway. I also changed the individual unit test
targets from e.g. std/array.test to std.array.test because, well,
it makes a lot more sense.
Atila
