error when trying to install libvpx brew install

config.log

>>> brew install -vd libvpx                                                            
==> Build Environment
CC: /usr/bin/cc => /usr/bin/gcc-4.0
CXX: /usr/bin/c++ => /usr/bin/c++-4.0
LD: /usr/bin/cc => /usr/bin/gcc-4.0
CFLAGS: -O3 -march=nocona -mfpmath=sse -w -pipe
CXXFLAGS: -O3 -march=nocona -mfpmath=sse -w -pipe
MAKEFLAGS: -j2
==> Downloading http://webm.googlecode.com/files/libvpx-v0.9.2.tar.bz2
File already downloaded and cached to /Users/alex2/Library/Caches/Homebrew
/usr/bin/tar xf /Users/alex2/Library/Caches/Homebrew/libvpx-0.9.2.tar.bz2
==> ./configure --prefix=/usr/local/Cellar/libvpx/0.9.2
./configure --prefix=/usr/local/Cellar/libvpx/0.9.2
Configuring selected codecs
  enabling vp8_encoder
  enabling vp8_decoder
Configuring for target 'universal-darwin9-gcc'
  enabling universal
  enabling postproc
Configuring selected codecs
  enabling vp8_encoder
  enabling vp8_decoder
  enabling ppc32
  enabling altivec
  enabling postproc
Unable to invoke compiler: /usr/bin/cc -O3 -march=nocona -mfpmath=sse -w -pipe -isysroot /Developer/SDKs/MacOSX10.5.sdk -mmacosx-version-min=10.5 -O3 -Wall -Wdeclaration-after-statement -Wdisabled-optimization -Wpointer-arith -Wcast-qual -Wno-unused -isysroot /Developer/SDKs/MacOSX10.5.sdk -mmacosx-version-min=10.5 -maltivec -faltivec -arch ppc -m32 -fasm-blocks

Configuration failed. This could reflect a misconfiguration of your
toolchains, improper options selected, or another problem. If you
don't see any useful error messages above, the next step is to look
at the configure error log file (config.err) to determine what
configure was trying to do when it died.
Error: #<BuildError: Failure while executing: ./configure --prefix=/usr/local/Cellar/libvpx/0.9.2>
/usr/local/Library/Homebrew/formula.rb:388:in `system'
/usr/local/Library/Formula/libvpx.rb:9:in `install'
/usr/local/Library/Homebrew/install.rb:95:in `install'
/usr/local/Library/Homebrew/formula.rb:205:in `brew'
/usr/local/Library/Homebrew/formula.rb:449:in `stage'
/usr/local/Library/Homebrew/formula.rb:408:in `mktemp'
/usr/local/Library/Homebrew/formula.rb:447:in `stage'
/usr/local/Library/Homebrew/formula.rb:200:in `brew'
/usr/local/Library/Homebrew/install.rb:73:in `install'
/usr/local/Library/Homebrew/install.rb:38
/usr/local/Library/Formula/libvpx.rb:8
==> Rescuing build...
When you exit this shell Homebrew will attempt to finalise the installation.
If nothing is installed or the shell exits with a non-zero error code,
Homebrew will abort. The installation prefix is:
/usr/local/Cellar/libvpx/0.9.2
bash-3.2$ exit
exit
==> Finishing up
rmdir: /usr/local/Cellar/libvpx/0.9.2 (empty)
Error: Nothing was installed to /usr/local/Cellar/libvpx/0.9.2
/usr/local/Library/Homebrew/install.rb:132:in `install'
/usr/local/Library/Homebrew/install.rb:38
/usr/local/Library/Formula/libvpx.rb:8

>>> brew --config
HOMEBREW_VERSION: 0.7.1
HEAD: 3e8ddf997b2d842adf17f9f655607495602fa255
HOMEBREW_PREFIX: /usr/local
HOMEBREW_CELLAR: /usr/local/Cellar
HOMEBREW_REPOSITORY: /usr/local
HOMEBREW_LIBRARY_PATH: /usr/local/Library/Homebrew
Hardware: dual-core 64-bit penryn
OS X: 10.5.8
Kernel Architecture: i386
Ruby: 1.8.6-369
/usr/bin/ruby => /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby
Xcode: 3.1.4
GCC-4.0: build 5493 
GCC-4.2: build 5577 
LLVM: N/A 
MacPorts or Fink? false
X11 installed? true