Hi Mark, Thank you for the clarification.
I think, then, that we should indeed provide a link to a notice about native libraries - like, "if you're using native libraries, make sure their architecture is 32-bit or universal as well; in case of MacPorts you can achieve this by doing port install libfoo +universal; in case of brew by brew install libfoo --universal". On Mon, Oct 8, 2012 at 9:52 PM, Mark Lentczner <mark.lentcz...@gmail.com> wrote: > I'm the source of the 32-bit recommendation, and the HP Mac distribution > builder > > To summarize what I read in this thread: > > 32-bit GHC/HP didn't work with 64-bit Cario libs > Some libs available via brew were 64-bit, and 32-bit ones would have to be > compiled > There is still some bug with 64-bit ghci and some graphics libs > There is a ghc bug with 64-bit on mac (bug #7040), which isn't fixed until > 7.6 > > There seemed to be the implication that a 64-bit ghc would work with 32-bit > libs, but I don't think that's true. Mac doesn't (generally) support mixed > modes in the same executable. All system libs are shipped dual-architecture. > I don't think there are any pre-installed libs that are shipped 64-bit only. > The problem seen with Cairo would cut both ways: If one had installed the > 32-bit version of Cairo, one would see the same problem with the 64-bit HP: > "wrong architecture". > > Since code compiled with the 32-bit system is both faster, and uses less > memory, and it has been the case that all libs are either shipped dual-arch, > or easily available as 32-bit, and there were known problems with the 64-bit > version for some use cases, it seemed to me to be best to suggest the 32-bit > version by default. > > The major source of the problems in the OP, seem to be that MacPorts and/or > brew don't appear to follow the Mac OS X lib standard of installing libs > dual arch. A brief look at the MacPorts page indicated that there were > various rules (OS version and processor version) that determined which arch. > it built by default. Perhaps we should tell people to install the HP > architecture that matches the architecture that they use for MacPorts or > brew. However, I bet most people don't know, so we'd need a pointer to where > they could find out the defaults for those systems, or how to establish what > their system is using. > > Finally, I note that HP 2012.4.0.0 (out in a month) will ship with GHC > 7.4.2, and so will still have the above bugs. > > - Mark > > > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > -- Eugene Kirpichov http://www.linkedin.com/in/eugenekirpichov We're hiring! http://tinyurl.com/mirantis-openstack-engineer _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe