Under Visual Studio 2008, building a project with global multi-file optimization and /arch:sse2 /Qax:sse4.2 ... compilation of the project takes about a minute and then it starts to link/optimize, which takes about 25-30 minutes.
Finally, it reaches:
xilink: executing 'link'
fatal error C1900: Il mismatch between 'P1' version '20080116' and 'P2' version '20070207'
LINK : fatal error LNK1257: code generation failed
At something of a loss ... but I'm wondering if it is complaining that some library or object wasn't compiled with the Intel compiler (we have rather a lot of external libraries).