solana-define-syscall is used at run time in 16 crates (of which 16 optionally). It is a direct run-time dependency in 6 crates. It's used only as a dev dependency in 1 crate.

Depender (with downloads and own rev deps) solana-define-syscall version
240 8 solana-pubkey =0.0.2
230 6 solana-instruction =0.0.2
220 3 solana-sha256-hasher =0.0.2
200 1 solana-program-memory =0.0.2
190 2 solana-msg =0.0.2
190 solana-secp256k1-recover =0.0.2