build/install problem on windows
platform: Windows 7
python: Python: Enthought Python Distribution, Version: 7.1-1 (32-bit)

> > > numpy.**version**
> > > '1.6.2'
> > > scipy.**version**
> > > '0.10.1'
> > > $:git rev-parse master
> > > 5b98fdfeae2ef42d78242c4cca1e0959b9c710db

$ python setup.py install

```
...
g++ -shared build\temp.win32-2.7\Release\pandas\src\ujson\python\ujson.o build\temp.win32-2.7\Release\pandas\src\ujson\python\objtojson.o build\temp.w
in32-2.7\Release\pandas\src\ujson\python\jsontoobj.o build\temp.win32-2.7\Release\pandas\src\ujson\lib\ultrajsonenc.o build\temp.win32-2.7\Release\pan
das\src\ujson\lib\ultrajsondec.o build\temp.win32-2.7\Release\pandas\src\datetime\np_datetime.o -LC:\Python27\lib\site-packages\numpy\core\lib -LC:\Py
thon27\libs -LC:\Python27\PCbuild -lnpymath -lpython27 -lmsvcr90 -o build\lib.win32-2.7\pandas\_ujson.pyd
Found executable C:\Python27\Scripts\g++.exe
Warning: .drectve `/manifestdependency:"type='win32' name='Microsoft.VC90.CRT' version='9.0.21022.8' processorArchitecture='x86' publicKeyToken='1fc8b
3b9a1e18e3b'" /DEFAULTLIB:"python27.lib" /DEFAULTLIB:"MSVCRT" /DEFAULTLIB:"OLDNAMES" ' unrecognized
Warning: .drectve `/manifestdependency:"type='win32' name='Microsoft.VC90.CRT' version='9.0.21022.8' processorArchitecture='x86' publicKeyToken='1fc8b
3b9a1e18e3b'" /DEFAULTLIB:"python27.lib" /DEFAULTLIB:"MSVCRT" /DEFAULTLIB:"OLDNAMES" ' unrecognized
C:\Python27\lib\site-packages\numpy\core\lib/npymath.lib(build/temp.win32-2.7/numpy/core/src/npymath/halffloat.obj):(.text+0x636): undefined reference
 to `_allshl'
C:\Python27\lib\site-packages\numpy\core\lib/npymath.lib(build/temp.win32-2.7/numpy/core/src/npymath/halffloat.obj):(.text+0x659): undefined reference
 to `_aullshr'
C:\Python27\lib\site-packages\numpy\core\lib/npymath.lib(build/temp.win32-2.7/numpy/core/src/npymath/halffloat.obj):(.text+0x7c5): undefined reference
 to `_allmul'
C:\Python27\lib\site-packages\numpy\core\lib/npymath.lib(build/temp.win32-2.7/numpy/core/src/npymath/halffloat.obj):(.text+0x7e1): undefined reference
 to `_allmul'
C:\Python27\lib\site-packages\numpy\core\lib/npymath.lib(build/temp.win32-2.7/numpy/core/src/npymath/halffloat.obj):(.text+0x831): undefined reference
 to `_allmul'
C:\Python27\lib\site-packages\numpy\core\lib/npymath.lib(build/temp.win32-2.7/numpy/core/src/npymath/halffloat.obj):(.text+0x84f): undefined reference
 to `_allmul'
collect2: ld returned 1 exit status
error: Command "g++ -shared build\temp.win32-2.7\Release\pandas\src\ujson\python\ujson.o build\temp.win32-2.7\Release\pandas\src\ujson\python\objtojso
n.o build\temp.win32-2.7\Release\pandas\src\ujson\python\jsontoobj.o build\temp.win32-2.7\Release\pandas\src\ujson\lib\ultrajsonenc.o build\temp.win32
-2.7\Release\pandas\src\ujson\lib\ultrajsondec.o build\temp.win32-2.7\Release\pandas\src\datetime\np_datetime.o -LC:\Python27\lib\site-packages\numpy\
core\lib -LC:\Python27\libs -LC:\Python27\PCbuild -lnpymath -lpython27 -lmsvcr90 -o build\lib.win32-2.7\pandas\_ujson.pyd" failed with exit status 1
```
