[Haskell-cafe] Re: ANNOUNCE: Utrecht Haskell Compiler (UHC) --
barsoap at web.de
Tue Apr 21 07:42:25 EDT 2009
Edward Middleton <emiddleton at bebear.net> wrote:
> Achim Schneider wrote:
> > Edward Middleton <emiddleton at bebear.net> wrote:
> >>> ghc 6.8.3 is /usr/bin/ghc on my office Mac, but nothing in the
> >>> world prevents there being some other program called ghc that
> >>> would also like to be there. Only by painstaking verification of
> >>> a whole bunch of applications together can one be confident of
> >>> "safety".
> >> Well then I guess we agree, so the question becomes who should do
> >> the painstaking verification. I think distribution maintainers
> >> should do this, you think end users who can't compile source
> >> packages should do this.
> > Not the maintainers, but the tool. Portage doesn't install stuff if
> > it would overwrite other things, records changes to files in
> > e.g. /etc to be merged later (interactively, with diffs), and
> > records every file it ever installed by having the package install
> > itself in /var/portage/<package>/<version>. You are
> > _completely_busted_ if your install script doesn't support that:
> > The script runs sandboxed.
> > Portage even registers every installed package into an empty ghc
> > package database, and merges them later. It knows what it does.
> > I can switch between different versions of packages, or different
> > implementations of the same functionality (say, java-sun vs.
> > java-blackdown) with eselect.
> > In short: Don't write your own install scripts, you're bound to get
> > it wrong, and/or be vastly inferior, compared to portage.
> But who writes the ebuild ? That said, on the various system I
> run I have over 100 custom ebuilds that I maintain. I can do this
> because most applications have standard sane build systems that
> install things in the regular places.
Yes, usually it's just a matter of writing "inherit distutils" and
figuring out (still missing) dependencies. While I utterly loathe
autoconf, it has its merit... being widely used.
(c) this sig last receiving data processing entity. Inspect headers
for copyright history. All rights reserved. Copying, hiring, renting,
performance and/or quoting of this signature prohibited.
More information about the Haskell-Cafe