We were seeing the following unexpected warnings in our builds:
C:/BuildAgent/work/19dd4d6ddfbe72aa/SecretProject/vcpkg_installed/x64-windows/include\fmt/format.h(771): warning : base class dllexport/dllimport specification differs from that of the derived class
C:/BuildAgent/work/19dd4d6ddfbe72aa/SecretProject/vcpkg_installed/x64-windows/include\fmt/format.h(3268): warning : base class dllexport/dllimport specification differs from that of the derived class
We use spdlog and fmt all over the place and weren't seeing these warnings elsewhere. Strangely there were not the usual error/warning codes that the compiler emits.
Then I noticed why - these diagnostics were preceded by the module name:
SomeFilter.cu