> Do you have any clue as to which extra .lib I should include or which
> gdal_i.lib I should switch to?
That rings a bell to me. I'm wondering if it might not be an issue of having a non-DEBUG build of GDAL, but including it in libLAS with DEBUG defined. The signature of l CPLMutexHolder::CPLMutexHolder() depends on whether DEBUG is defined or not.