Add Single Multiplatform Binary Support

[kassah]

It would be incredibly nice to have a single big binary that could run on all platforms.

Cosmopolitan implements this, this blog entry about actually portable executable format covers a bit of the methods used. Not sure of the realism of using that to fork into multiple php embedded php runtimes, but this issue is a request to explore that.

[gwleuverink]

This would be incredible. Unfortunately, like you mentioned this would still require us to include multiple php runtimes which would dramatically increase the file size.

Looking into Cosmopolitan this might open up other avenues of improvement too, like using a lightweight C wrapper which uses the php builds as a C library. Would def be worth it investigating.

That being said there are a lot things on the todo list for this library - some dropping soon-ish.

I'll convert this to a Discussion in the mean time. If you end up investigating this please share your findings 🙏🏻