Cargo Features

solana-nostd-big-mod-exp has no features set by default.

[dependencies]
solana-nostd-big-mod-exp = { version = "0.1.3", features = ["no-syscall"] }
no-syscall = dashu

Affects solana-nostd-big-mod-exp::big_mod_exp, solana-nostd-big-mod-exp::big_mod_exp_fixed

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

dashu no-syscall?