Cargo Features

[dependencies]
gl33 = { version = "0.2.1", default-features = false, features = ["global_loader", "println_debug", "track_caller"] }
default = global_loader, println_debug

These default features are set whenever gl33 is added without default-features = false somewhere in the dependency tree.

global_loader default

Affects gl33::global_loader

println_debug default

Affects gl33::println_debug_message_callback

track_caller

enables track_caller attribute on any function that can panic.