It's used at build time in 36 crates (of which 5 optionally, 5 directly).

Depender (with downloads and own rev deps) nano-gemm-codegen version
12K 1 nano-gemm build ^0.1
11K 1 nano-gemm-c32 build ^0.1
11K 1 nano-gemm-c64 build ^0.1
11K 1 nano-gemm-f32 build ^0.1
11K 1 nano-gemm-f64 build ^0.1