On 30/07/2008, at 23:46, Simon Marlow wrote:
We can talk about the general issues on IRC. But I thought I'd
answer a few of the specific questions quickly:
Thanks, Simon!
Roman Leschinskiy wrote:
I don't think I understand how GHC itself is built any longer,
either. What does cabal-bin do?
It's effectively a pre-compiled Setup.hs for packages that have no
need for a custom Setup.hs. cabal-install does the same job for end-
users, but we can't rely on having cabal-install in the GHC build
system.
I see. So it looks at the Build-Type in the package description and
calls the right defaultMain if it's not Custom. And if my Setup.hs
isn't standard then it's my responsibility to set the Build-Type to
Custom in the .cabal file and this isn't checked, right?
I wonder, though. What exactly does this buy us? Duncan says:
The point being that linking default Setup.hs scripts all the time
is a
waste (especially since it doesn't parallelise).
But the time spent in compiling those Setup.hs is negligible and don't
understand the "it doesn't parallelise" bit.
What is runghc.wrapper?
it's a template used to make a shell wrapper for a binary. There
seems to be new functionality in Cabal to support this.
I see. Is runghc the only program we do this for? Or will others be
added gradually?
What is the difference between make.library.* and build.library.*
and why do we need both
This one is my fault. build.* runs 'cabal-bin build', whereas make.*
runs 'cabal-bin makefile' followed by 'make'. That is, build.* ends
up using ghc --make, whereas make.* ends up using a traditional
makefile with ghc -M for dependencies and individual single-module
compilations. The latter was added so that we could (a) use make -j
and (b) compile single modules for testing/debugging purposes.
Ok, this answers the following question:
> (and why doesn't one of them work for dph)?
Because it does non-standard stuff in Setup.hs and hence no Makefile
can be generated. Hence the SUBDIRS_BUILD hackery in libraries/
Makefile, I assume.
Thanks again!
Roman
_______________________________________________
Glasgow-haskell-users mailing list
Glasgow-haskell-users@haskell.org
http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
