Cargo features are not additive

[mgeier]

Cargo features are not additive

[0x08088405]

Yeah, that is indeed an issue. However these features map to non-additive features in minimp3 itself, so I'm not sure if there is a good solution for that. Should I just add a warning? I have thought about compiling multiple instances of minimp3 as a workaround in the past but that would lead to ugly linker errors unless I write a script to substitute function names and definitions, I suppose, but that still wouldn't work with things like NO_SIMD.

[mgeier]

Should I just add a warning?

I don't know.
Do you mean a warning in the documentation?
Or is there a way to create a warning during the build process?

Would this problem even appear in practice?
Is it realistic that there are multiple dependencies to rmp3 in a project?

[mgeier]

FYI, I've just published my crate: https://docs.rs/minimp3_ex-sys/0.1.0/

I've removed all features that I don't need myself, leaving only the float-output feature.
For this I've added a warning to the docs.

In the rare case of a feature mismatch this should lead to a hard compilation error.

A mismatch in the other features would not easily be noticed be users, so I completely removed them for now (mgeier/minimp3_ex-sys@74e0b27).
If and when we find a good solution for those non-additive features, I can add them back.

[0x08088405]

This is extremely late, but I've released 0.3, a complete rewrite, and I inverted most of the flags where applicable so they can be additive. For float, I also just added a warning and linked the explanation linked here. Not much else you can do.