Unity builds? about eastl HOT 9 CLOSED

We use unity builds (we call them bulkbuilds) internally as well. EASTL is tested regularly in bulkbuild scenarios so it should be pretty painless to get the code compiling. I'm not anticipating any code changes are required. I wonder how easy/hard cmake makes this...

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I've been experimenting a bit with them in CMake today, and it's pretty hard to get working. I tried various ways to get it working, and all of them have been breaking in some way.
I'll try to experiment a bit more, worst case scenario, we could always switch to waf :P

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Waf is a build system written in Python. Initially based on Scons, but later rewritten because the author decided that the problems of Scons (mainly performance) were too complicated to fix.
It's being used by Avalanche Studios (the guys behind Just Cause), CryEngine, and other projects where you need full control over the build process.
It features stuff like Unity builds as an out of the box feature, and it has generators for Visual Studio, Eclipse, and some other IDEs (all call back into Waf for the building).
I'm currently using it for my personal projects, so I can provide build files as a proof of concept if needed.

Check out the wikipedia page on it: https://en.wikipedia.org/wiki/Waf
The website: https://waf.io/
And the official book: https://waf.io/book/

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I've tried this http://kecsapblog.blogspot.nl/2016/03/unity-build-macro-for-cmake.html and an older variation of it, and cotire, which all claim to do unity builds on cmake.
The former comes closest, but fails when linking, and it looks like it's because it doesn't include the compiled unity build object in the link command. I think this happens because it looks like the functions have been written for CMake 2.x.
Cotire had dependency problems and would compile stuff 3 times.

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Welp, I haven't found anything that gets me Unity builds on CMake reliably. If anybody else knows how to properly incorporate Unity builds in CMake, feel free to PR/post, I'm giving up on it for now.

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I'm going to close the bug. Feel free to re-open or just submit a PR if you wish to continue the work.

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I think I ran into a similar issue with waf, which is fixed by changing the order of inclusion in EAStdC.
Perhaps some work should be done to make it order independent? I don't exactly remember what the exact linker error was, but I'll give it a try later.

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