brew install -v fio

gistfile1.txt

==> Downloading http://brick.kernel.dk/snaps/fio-1.37.tar.bz2
File already downloaded in /Users/markus/Library/Caches/Homebrew
/usr/bin/tar xf /Users/markus/Library/Caches/Homebrew/fio-1.37.tar.bz2
==> make -f Makefile.mac prefix=/usr/local/Cellar/fio/1.37 && make -f Makefile.mac prefix=/usr/local/Cellar/fio/1.37 install
make -f Makefile.mac prefix=/usr/local/Cellar/fio/1.37 && make -f Makefile.mac prefix=/usr/local/Cellar/fio/1.37 install 
    CC gettime.o
    CC fio.o
    CC ioengines.o
    CC init.o
    CC stat.o
    CC time.o
    CC log.o
    CC filesetup.o
llvm-gcc-4.2: error trying to exec '/usr/bin/../llvm-gcc-4.2/bin/powerpc-apple-darwin11-llvm-gcc-4.2': execvp: No such file or directory
lipo: can't figure out the architecture type of: /var/folders/04/x67yn8_90j3fvd74fh_trrwr0000gn/T//ccgAlAqk.out
make: *** [gettime.o] Error 255
make: *** Waiting for unfinished jobs....
llvm-gcc-4.2: error trying to exec '/usr/bin/../llvm-gcc-4.2/bin/powerpc-apple-darwin11-llvm-gcc-4.2': execvp: No such file or directory
lipo: can't figure out the architecture type of: /var/folders/04/x67yn8_90j3fvd74fh_trrwr0000gn/T//ccNN7mc0.out
make: *** [time.o] Error 255
llvm-gcc-4.2: error trying to exec '/usr/bin/../llvm-gcc-4.2/bin/powerpc-apple-darwin11-llvm-gcc-4.2': execvp: No such file or directory
lipo: can't figure out the architecture type of: /var/folders/04/x67yn8_90j3fvd74fh_trrwr0000gn/T//cc1D668a.out
make: *** [log.o] Error 255
llvm-gcc-4.2: error trying to exec '/usr/bin/../llvm-gcc-4.2/bin/powerpc-apple-darwin11-llvm-gcc-4.2': execvp: No such file or directory
lipo: can't figure out the architecture type of: /var/folders/04/x67yn8_90j3fvd74fh_trrwr0000gn/T//ccv2YvRp.out
make: *** [ioengines.o] Error 255
llvm-gcc-4.2: error trying to exec '/usr/bin/../llvm-gcc-4.2/bin/powerpc-apple-darwin11-llvm-gcc-4.2': execvp: No such file or directory
lipo: can't figure out the architecture type of: /var/folders/04/x67yn8_90j3fvd74fh_trrwr0000gn/T//cciAbBw9.out
make: *** [filesetup.o] Error 255
llvm-gcc-4.2: error trying to exec '/usr/bin/../llvm-gcc-4.2/bin/powerpc-apple-darwin11-llvm-gcc-4.2': execvp: No such file or directory
lipo: can't figure out the architecture type of: /var/folders/04/x67yn8_90j3fvd74fh_trrwr0000gn/T//ccG8Nrv0.out
make: *** [init.o] Error 255
llvm-gcc-4.2: error trying to exec '/usr/bin/../llvm-gcc-4.2/bin/powerpc-apple-darwin11-llvm-gcc-4.2': execvp: No such file or directory
lipo: can't figure out the architecture type of: /var/folders/04/x67yn8_90j3fvd74fh_trrwr0000gn/T//ccYj9j1e.out
make: *** [stat.o] Error 255
llvm-gcc-4.2: error trying to exec '/usr/bin/../llvm-gcc-4.2/bin/powerpc-apple-darwin11-llvm-gcc-4.2': execvp: No such file or directory
lipo: can't figure out the architecture type of: /var/folders/04/x67yn8_90j3fvd74fh_trrwr0000gn/T//ccnzP30a.out
make: *** [fio.o] Error 255
==> Exit Status: 2
http://github.com/mxcl/homebrew/blob/master/Library/Formula/fio.rb#L10
==> Environment
/usr/bin/gcc
HOMEBREW_VERSION: 0.8
HEAD: b0b39e944ac962577ae3332243cec62e0bb6a462
HOMEBREW_PREFIX: /usr/local
HOMEBREW_CELLAR: /usr/local/Cellar
HOMEBREW_REPOSITORY: /usr/local
HOMEBREW_LIBRARY_PATH: /usr/local/Library/Homebrew
Hardware: 8-core 64-bit sandybridge
OS X: 10.7.1
Kernel Architecture: x86_64
Ruby: 1.8.7-249
/usr/bin/ruby => /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby
Xcode: 4.2
GCC-4.0: N/A 
GCC-4.2: build 401 (5664 or newer recommended)
LLVM: build 2336 
MacPorts or Fink? false
X11 installed? true
==> Build Flags
CC: /usr/bin/llvm-gcc => /usr/llvm-gcc-4.2/bin/llvm-gcc-4.2
CXX: /usr/bin/llvm-g++ => /usr/llvm-gcc-4.2/bin/llvm-g++-4.2
LD: /usr/bin/llvm-gcc => /usr/llvm-gcc-4.2/bin/llvm-gcc-4.2
CFLAGS: -O3 -march=core2 -w -pipe
CXXFLAGS: -O3 -march=core2 -w -pipe
MAKEFLAGS: -j8

Error: Failed executing: make -f Makefile.mac prefix=/usr/local/Cellar/fio/1.37 && make -f Makefile.mac prefix=/usr/local/Cellar/fio/1.37 install 
If `brew doctor' does not help diagnose the issue, please report the bug:
    https://github.com/mxcl/homebrew/wiki/checklist-before-filing-a-new-issue