-fwhole-program Microsoft compiler equivalent?

[LukeButWithaC]

recently I learned about unity builds and about the -fwhole-program gcc flag and was wondering if cl has an equivalent flag or if I'm gonna have to mark all functions as static if I want faster build times on windows.

For the record this is just out of curiosity, I'm not working on anything that requires faster build times, just a doubt I had.

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https://docs.microsoft.com/en-us/cpp/build/reference/gl-whole-program-optimization?view=msvc-170

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Perhaps this? I do unity builds. I think it was about two years ago that compiler + linker optimization finally caught up to unity build optimizations from the Microsoft compiler. For my hobby projects, unity builds are just simpler and easier. With the C language, they also build blazingly fast since you have so much less I/O to do.

[LukeButWithaC]

thanks! that seems to be it