On Jun 18, 2007, at 6:06 PM, Stefan O'Rear wrote:
On Mon, Jun 18, 2007 at 11:56:57AM -0400, Peter Tanski wrote:
Now each GHC-Haskell-based program installer would search /usr/local/
lib for, say, libHSrts_dyn-6.6.1.dylib and install that version if
necessary. What happens on uninstall? ...
That is why I think your idea was good: put everything into distinct
directories.
Debian's high level package manager will automatically garbage collect
dependancies, such that every package on your system is either
manually
selected for install or a dependant of one. Thus there is no library
leak problem.
The Debian package system (I assume you are referring to apt, or
maybe dpkg?) is very convenient (and relatively quick!). I don't
know how well the BSD-style package systems garbage collect but I
have not had any problems using port or fink--though sometimes they
pull more dependancies than they need because installed programs
outside their system are (wisely) not considered. Since my best
machine is a Mac (PowerBook G4, 1.25GHz) the lost libraries become a
problem as soon as I work independently of a package system. I
expect the same would be true for anyone working independently. Some
individual languages have their own package systems, such as Lisp's
asdf; OCaml has GODI. Haskell is moving in that direction with Cabal
but it is still more of a build system than anything else and in any
case it would probably be better to keep with the system packaging
setup, such as Debian's, for program distribution. That way GHC
libraries may reside comfortably in the standard system directories
but I am still a little querulous. I would rather all haskell
libraries use the standard (OS X) DYLD_LIBRARY_PATH, though
DYLD_FALLBACK_LIBRARY_PATH (putting things in $(home)/lib) might help
for the haskell-universe. That may be the solution for programs,
though it requires more work: Haskell would need packaging.
On a related note, if anyone is interested, once we get an idea of
where we want to put things I can modify the installer script to
create an OS X pkg (using PackageMaker) for GHC binary
distributions. At least that would make removal easier (using
Desinstaller). The old 6.4.1 OS X application install was slick; I
might redo that.
Cheers,
Pete
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