Optimize compile times

[xezon]

Cpp's seem to build slow. Noticable when building without /MP flag. Inspect compile times and find the culprits.

[helmutbuhler]

Just as a reference: Building ZH from scratch in VC6.0 in the IDE in Release with mostly original project files takes about 2:30 minutes on my machine.

[xezon]

Hmm interesting. Does it do a multithreaded build? When I do a build with cmake + nmake it takes 20 minutes or so. Is not multithreaded.

[helmutbuhler]

No, all singlethreaded. But it is only building the game, not the tools and not Generals.

[xezon]

We have not replicated the Precompiled Header setup in our cmake. That may be a problem.

[xezon]

Fixing the warning spams in trig.cpp should increase compile times.

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Why Is My C++ Build So Slow? Compilation Profiling and Visualization - Samuel Privett - CppCon 2024
https://www.youtube.com/watch?v=Oih3K-3eZ4Y