A typeof test case defined as: [ run odr1.cpp odr2.cpp : : : <define>BOOST_TYPEOF_COMPLIANT : odr_emulation ] is failing in a way that looks like como didn't even start to compile odr1.cpp: http://engineering.meta-comm.com/boost-regression/CVS-HEAD/developer/output/ Bronek-bin-boost-libs-typeof-test-odr_emulation-test-como-4_3_3-vc7_1-debug. html There is the compiler output for odr2.cpp only, and then linker output that claims there is no odr1.obj. GCC, VC7.1 appear to be fine with this test... Any insights on the cause of the problem? Thanks, Arkadiy