Update build.zig against breaking changes in 0.14.0 release

[qaptoR]

I'm only making this Issue as a 'TODO' for whomever maintains the build.zig for this project. There is no insistence to complete this by any timeframe, I was simply in the strange position of both beginning to use zig and PCRE2 almost simultaneously as the new 0.14 spec was released.

I plan on using PCRE2 for completing advent of code challenges in zig. As well as for empowering the regex portion of what will eventually be a game engine (as I have been greatly impressed by it's use already in Godot).

for now of course I am happy to stay on 0.13 release

[NWilson]

There is no one formally maintaining the zig support, as far as I know. Certainly none of the core PCRE2 contributors use zig, so it should be a task for someone from the zig community to do.

You would be very welcome to send a patch or PR to update to 0.14.

Does Zig really offer so little backwards compatibility that we have to make changes to our build script on every release?

[qaptoR]

Yeah, I actually spent yesterday afternoon playing around with the build script trying to get it to work, and It did compile, but I may have gotten this or that wrong. I'm going to keep at it today (learn by trial by fire).

Being so new to zig, it's hard to say, but I think in answer to your question the idea is that before 1.0 release, they intend for each version to be allowed to make breaking changes to the language. Looking at the release notes for 0.14.0 there are definitely a bunch of those.
After 1.0 I think the idea is that the language will have settled into itself and future changes will be backward compatible (but possibly only for minor releases. For example 1.1, etc). I know nothing about what will happen with a 2.0 release as far as backward compatible (if it'll be like python for example, where the use the opportunity to overhaul the little cruft that is adding up from trying to always be backwards compatible).

If I can figure it out, and am able to, I will try to maintain this build.zig (if no one else steps up especially). As like I said before, I have used this library as part of the Godot engine for years and think it's worthwhile having available in zig.

I'll get back to it, and hopefully have something to show for my effort sooner rather than later.

[qaptoR]

Okay, so, through inferring much from the zig std library documentation, some trial and error, and some very lucky guesses (and surprisingly very little help from any LLMs) I've gotten the library to compile, and run the test project that can be found here: https://github.com/sheran/pcre2-zig

It shouldn't be long before I have a pull request that provides the new build instructions