ext/bcmath: Organized dependency codes

[SakiTakamachi]

PHP and Zend code (especially macros) that were scattered throughout libbcmath have been consolidated into adapter.h and replaced with names like BC_XXX. This makes it easier to identify external dependencies.

[nielsdos]

I don't think this makes sense.
It makes sense for bundled libs like timelib because they have a separate upstream thta can't integratie Zend or PHP specific bits in them.
For libbcmath, which has been bundled and adapted since ages already, this has no benefit.

[SakiTakamachi]

@nielsdos

Hmm, that’s a very good point…
At this point, so little of the original remains that it might be quicker to count what is original, and honestly, I was hesitant about whether the change was worth making.

Thank you. I’ll go ahead and close this.