<div dir="ltr">Hey everyone,<div><br></div><div style>if you are actively using ghc 7.6 on your mac, </div><div style>for now please do not install xcode 5.</div><div style><br></div><div style>It will break your ghc install, because 7.6 doesn't know how to correctly use Clang for the CPP work. (ghc head / and thus 7.8 will work fine with xcode 5, thanks to some outstanding work by Austin Seipp, 7.6 does not)</div>
<div style><br></div><div style>if you do not need xcode 5, and you're actively using ghc 7.6, stay with xcode 4.6 for now.</div><div style><br></div><div style>if you installed xcode 5 because its there, and now your ghc 7.6 is occasionally giving you strange errors involving CPP parse failures on fragments like "#-}", you should go to the apple developers website, download, and reinstall the xcode 4.6 CLI tools.</div>
<div style><br></div><div style><br></div><div style>if you need both xcode 5 and ghc in working order *right now, tomorrow*, either</div><div style><br></div><div style>a) live on the wildside: test out using ghc head: also means you could play with ghc-ios too!</div>
<div style><br></div><div style>b) if you need both in working order now, and stabilish, Darin Morrison has a set of mac-homebrew taps that should be you use</div><div style> <a href="https://github.com/darinmorrison/homebrew-haskell">https://github.com/darinmorrison/homebrew-haskell</a> <br>
</div><div style>these taps should be regarded as more "official" and "canonical" than the formula's that brew provides (the normal brew ones recurrently have problems induced by folks who aren't haskell devs)</div>
<div style><br></div><div style>c) wait a wee bit till 7.8 lands in all its glory, and have both the freshest of xcodes, and the newest of awesome ghcs</div><div style><br></div><div style>tl;dr</div><div style><br></div>
<div style>if you don't need xcode 5, having xcode 4.6 CLI tools installed will stand you in good stead.</div><div style><br></div><div style>if you are on os x mavericks, or absolutely need xcode 5 installed, and you want a ghc thats already released, use darin's brew formulae <a href="https://github.com/darinmorrison/homebrew-haskell">https://github.com/darinmorrison/homebrew-haskell</a></div>
<div style><br></div><div style><br></div><div style>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.</div>
<div style><br></div><div style><br></div><div style>cheers</div><div style><br></div><div style>-Carter</div></div>