Compilation error for wasm32-unknown-unknown target -> removed libc dependency and used core::ffi c-types

[severinpolo]

I was trying to compile a local project with cblas-sys as a dependency to the target wasm32-unknown-unknown using wasm-pack. I got a compilation error stating that the used aliases for the c-types are not found:

error[E0432]: unresolved imports `libc::c_char`, `libc::c_double`, `libc::c_float`, `libc::c_int`
  --> $HOME/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/cblas-sys-0.2.0/src/lib.rs:11:12
   |
11 | use libc::{c_char, c_double, c_float, c_int};
   |            ^^^^^^  ^^^^^^^^  ^^^^^^^  ^^^^^ no `c_int` in the root
   |            |       |         |
   |            |       |         no `c_float` in the root
   |            |       no `c_double` in the root
   |            no `c_char` in the root
   |
   = help: consider importing this type alias instead:
           core::ffi::c_char
   = help: consider importing this type alias instead:
           core::ffi::c_double
   = help: consider importing this type alias instead:
           core::ffi::c_float
   = help: consider importing this type alias instead:
           core::ffi::c_int

I followed the suggestion to exchange the type aliases and use the ones in the core::ffi module. Using these types, cblas-sys compiles without errors to the wasm32-unknown-unknown target.

[IvanUkhov]

Thank you! I wonder why it was overlooked before that libc is not needed. It probably applies to all sys crates in blas-lapack-rs.