Description
./configure currently distinguishes between --enable-extname and --with-extname flags, where --enable is used for extensions without dependencies, and --with for those with dependencies.
In practice, the actual usage is very inconsistent, and there's plenty of edge cases (what about extensions that have a dependency, but the dependency is bundled?) Since the pkg-config migration in PHP 7.4, most --with options don't even accept a library directory anymore, so the difference between these flags eroded further.
In PHP 7.4, we tried to normalize the usage of --enable and --with somewhat, but this only went partway, and I think was a pretty bad idea in hindsight, because it just broke existing configure scripts without much benefit.
I think it would be better to give up on this distinction entirely, make all extensions enabled via --enable-extname (in docs), but accept --with-extname as an alias.
I'm not sure how this would be done technically, but the right starting point is probably the macro definitions starting at https://github.com/php/php-src/blob/c260613c6f166dc25d7c3a4ed090df5c08735491/build/php.m4#L684.