std::array in C++ isn't slower than array in C

https://pvs-studio.com/en/blog/posts/cpp/1164/

@cpp@programming.dev @cppguide @cpp@discuss.tchncs.de

C++ programmer's guide to undefined behavior: part 6 of 11

https://pvs-studio.com/en/blog/posts/cpp/1163/

@cpp @cppguide

I just wanted to have a handy description of computed goto that I could refer to, to reuse this concept without having to read thousands of line trying to make sense out of it.

I created a little side project over the past few days, a new build system for C and C++: https://github.com/blueOkiris/acbs/

I've seen a lot of discourse over C build tools. None of them really seem solid except for (some) Makefiles (some Makefiles are atrocious; you just can't rely on people these days). Bazel, cmake - they're just not straight forward like a clean Makefile is, basically black magic, but setting up a Makefile from scratch is a skill. Many copy the same one over each time. Wouldn't it be nice if that Makefile didn't even need to be copied over?

Building C should be straight forward. Grab the C files and headers I want, set some flags, include some libraries, build, link. Instead project build systems are way way way overcomplicated! Like have you ever tried building any of Google's C projects? Nearly impossible to figure out and integrate with projects.

So I've designed a simplistic build system for C (also C++) that is basically set up to work like a normal Makefile with gcc but where you don't have to set it up each time. The only thing you are required to provide is the name of the binary (although you can override defaults for your project, and yes, not just binaries are possible but libs as well). It also includes things like delta building without needing to configure.

Now there is one thing I haven't added yet - parallel building. It should be as simple as adding separate threads when building files (right now it's a for loop). I know that's something a lot of people will care about, but it's not there yet. It's also really intended to only work with Linux rn, but it could probably pretty easily be adjusted to work with Windows.

Lay your project out like the minimal example, adjust the project layout, and get building! The project itself is actually bootstrapped and built using whatever the latest release is, so it's its own example haha.

It's dead simple and obvious to the point I would claim that if your project can't work with this, your project is wrong and grossly over-complicated in its design, and you should rework the build system. C is simple, and so should the build system you use with it!

So yeah. Check it out when y'all get a chance

I had some fun trying to check if a hash (more like a transformation really) was collision free, so I wrote a quick piece code and then iterated on it so that it was usable.

I might add a quick bench and graphs and try to push it even further just for fun, to explore std::future a bit more (though the shared bit set might be a problem unless you put a shared condition variable on it to allow concurrent read but block concurrent writes?)