Re: [Haskell-cafe] PSA: do not install xcode 5 if you are using ghc 7.6

Just to add to Carter's message: if you happened to install Xcode 5 anyway, then realized your mistake and uninstalled it and installed Xcode 4 again, you will STILL have the command line tools that came with Xcode 5 and your Haskell toolchain will STILL be broken -- and so far I have been unable to fix that by any combination of cabal's "gcc-location", ghc's "-pgmP", and various other options. This was true even though I installed the command line tools that came with Xcode 4. Eventually I fixed this by manually installing the command line tools separately from https://developer.apple.com/downloads/index.action?=command%20line%20tools# Unlike ticking the "Command line tools" option in Xcode itself, this will actually overwrite the command line tools in /usr/bin, and my Haskell toolchain was once again restored. I don't know why I couldn't get it to work by pointing to the relevant tools in /Applications/Xcode.app/Contents/Developer/usr/bin, but there you go.. Anyway, this might save some of you some headaches.. -Edsko On Fri, Sep 20, 2013 at 7:05 PM, Carter Schonwald wrote:

glad to help.

an alternative for the discerning power user is to install a recent version of gcc locally (eg 4.8), and build 7.6.3 with that! (or just repoint your ghc settings file to a locally built version of real gcc.)

yes, assuming we have the time (after all, it's all volunteer time), that is the plan.

On Fri, Sep 20, 2013 at 1:50 PM, Adam Foltzer wrote:

...

Hi Carter,

Thanks for this heads up! Many of us here are cutting edge Mac users, and would have been bitten by this.

...

Darin and I plan to spend some time next month preparing an unofficial patched version of ghc 7.6 that should play nice with clang / xcode 5, though at such a time ghc 7.8 will be in RC status at the very least.

Can this be backported to the 7.6.3 tag and released as 7.6.4? It would be nice to not have to choose between running the latest xcode and the ability to test multiple GHC versions.

Cheers, Adam

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