brew install -v svn on 10.8 with Xcode 4.5 DP2

gistfile1.txt

brew install -v svn
==> Installing subversion dependency: serf
==> Downloading http://serf.googlecode.com/files/serf-1.1.0.tar.bz2
Already downloaded: /Library/Caches/Homebrew/serf-1.1.0.tar.bz2
/usr/bin/tar xf /Library/Caches/Homebrew/serf-1.1.0.tar.bz2
==> ./configure --disable-debug --disable-dependency-tracking --prefix=/usr/local/Cellar/serf/1.1.0
./configure --disable-debug --disable-dependency-tracking --prefix=/usr/local/Cellar/serf/1.1.0
checking for chosen layout... Serf
checking for working mkdir -p... yes
checking build system type... x86_64-apple-darwin12.0.0
checking host system type... x86_64-apple-darwin12.0.0
checking target system type... x86_64-apple-darwin12.0.0

Configuring Apache Portable Runtime library...

checking for APR... yes
  setting CPP to "/Applications/Xcode.app/Contents/Developer/Toolchains/OSX10.8.xctoolchain/usr/bin/cc -E"
  setting APR_LIBTOOL to "/usr/share/apr-1/build-1/libtool"
  adding "-DDARWIN" to CPPFLAGS
  adding "-DSIGPROCMASK_SETS_THREAD_MASK" to CPPFLAGS
  setting LTFLAGS to "--silent"

Configuring Apache Portable Runtime Utility library...

checking for APR-util... yes
checking for gcc... /usr/bin/clang
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables... 
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether /usr/bin/clang accepts -g... yes
checking for /usr/bin/clang option to accept ISO C89... none needed
checking how to run the C preprocessor... /Applications/Xcode.app/Contents/Developer/Toolchains/OSX10.8.xctoolchain/usr/bin/cc -E
configure: error: C preprocessor "/Applications/Xcode.app/Contents/Developer/Toolchains/OSX10.8.xctoolchain/usr/bin/cc -E" fails sanity check
See `config.log' for more details.
config.log was copied to /Users/willmot/Library/Logs/Homebrew
==> Exit Status: 1
https://github.com/mxcl/master/blob/master/Library/Formula/serf.rb#L9
==> Build Environment
CPU: dual-core 64-bit penryn
OS X: 10.8-x86_64
Xcode: 4.5
X11: 2.7.2 @ /opt/X11
CC: /usr/bin/clang
CXX: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ => /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
LD: /usr/bin/clang
CFLAGS: -Os -w -pipe -march=native -Qunused-arguments -mmacosx-version-min=10.8
CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments -mmacosx-version-min=10.8
CPPFLAGS: -isystem /usr/local/include
LDFLAGS: -L/usr/local/lib
MACOSX_DEPLOYMENT_TARGET: 10.8
MAKEFLAGS: -j2
Error: Failed executing: ./configure --disable-debug --disable-dependency-tracking --prefix=/usr/local/Cellar/serf/1.1.0 (serf.rb:9)
If `brew doctor` does not, this may help you fix or report the issue:
    https://github.com/mxcl/homebrew/wiki/bug-fixing-checklist
We saved the configure log:
    ~/Library/Logs/Homebrew/config.log
If you report the issue please paste the config.log here:
    http://gist.github.com/

also happening with xcode 4.5 dp3

Same problem with XCode 4.4

Im getting the same problem in XCode 4.3.3, OSX 10.7.4.

Tried installing serf by itself by running "port install -v serf" and getting the same issue.

I ended up installing the 'command line tools' from XCode 4.4 on OSX 10.8, those include svn.