Mesa 8.0.1 cannot be compile in release under Windows 7 64bits using LLVM. It outputs rubbish link problems:
[...]
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face' specified smucons: *** [build\windows-x86_64\gallium\drivers\llvmpipe\lp_test_conv.exe] Error 1169
ltiple tscons: *** [build\windows-x86_64\gallium\drivers\llvmpipe\lp_test_blend.exe] Error 1169
imes; using first specificatiosn
cons: *** [build\windows-x86_64\gallium\drivers\llvmpipe\lp_test_format.exe] Error 1169

However it compiles and works just fine in debug. This the command line I used:
path_to_pyhton\Scripts\scons.bat platform=windows build=release machine=x86_64 statetrackers=mesa driver s=softpipe,trace winsys=gdi

A workaround would be really appriciated.