Cargo Features

Bonmin-src has no features set by default.

[dependencies]
bonmin-src = { version = "0.1.1+1.8.9", features = ["cplex", "filtersqp"] }
default

These default features are set whenever bonmin-src is added without default-features = false somewhere in the dependency tree.

Enables ipopt-src

cplex
filtersqp

Bonmin-src has 3 features without comments.