validator4-osx-x86_64-head (OS X/x86_64 HEAD (George Colpitts)), build 16, Failure

[Builder]

validator4-osx-x86_64-head (OS X/x86_64 HEAD (George Colpitts)), build 16

Build failed
Details: http://haskell.inf.elte.hu/builders/validator4-osx-x86_64-head/16.html

git clone          | Success
create mk/build.mk | Success
get subrepos       | Success
repo versions      | Success
booting            | Success
configuring        | Failure: Just (ExitFailure 77)

Build failed
Details: http://haskell.inf.elte.hu/builders/validator4-osx-x86_64-head/16.html

-------------- next part --------------
checking for gfind... no
checking for find... /usr/bin/find
checking for sort... /usr/bin/sort
checking for GHC version date... inferred 7.9.20141031
checking for ghc... /usr/bin/ghc
checking version of ghc... 7.8.3
checking whether bootstrap compiler is affected by bug 9439... yes
checking build system type... x86_64-apple-darwin14.0.0
checking host system type... x86_64-apple-darwin14.0.0
checking target system type... x86_64-apple-darwin14.0.0
Build platform inferred as: x86_64-apple-darwin
Host platform inferred as: x86_64-apple-darwin
Target platform inferred as: x86_64-apple-darwin
GHC build  : x86_64-apple-darwin
GHC host   : x86_64-apple-darwin
GHC target : x86_64-apple-darwin
configure: Building in-tree ghc-pwd
checking for path to top of build tree... /Users/gcolpitts/nightly-builds/builder/tempbuild/build
checking for gcc... gcc
checking whether the C compiler works... no
configure: error: in `/Users/gcolpitts/nightly-builds/builder/tempbuild/build':
configure: error: C compiler cannot create executables
See `config.log' for more details