llama_cpp_rs 0.1.2

use std::env;
use std::path::PathBuf;

fn main() {
    let bindings = bindgen::Builder::default()
        .header("./binding.h")
        .blocklist_function("tokenCallback")
        .parse_callbacks(Box::new(bindgen::CargoCallbacks))
        .generate()
        .expect("Unable to generate bindings");

    let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());

    bindings
        .write_to_file(out_path.join("bindings.rs"))
        .expect("Couldn't write bindings!");

    let mut cx_flags = String::from("-Wall -Wextra -Wpedantic -Wcast-qual -Wdouble-promotion -Wshadow -Wstrict-prototypes -Wpointer-arith -march=native -mtune=native");
    let mut cxx_flags = String::from("-Wall -Wdeprecated-declarations -Wunused-but-set-variable -Wextra -Wpedantic -Wcast-qual -Wno-unused-function -Wno-multichar -march=native -mtune=native");
    
    // check if os is linux
    // if so, add -fPIC to cxx_flags
    if cfg!(target_os = "linux") {
        cx_flags.push_str(" -pthread");
        cxx_flags.push_str(" -fPIC -pthread");
    }
    
    let mut cbuild = &mut cc::Build::new();
    
    let mut ccbuild = &mut cc::Build::new();
    
    for cx_flag in cx_flags.split(" ").into_iter() {
        cbuild = cbuild.flag(cx_flag);
    }
    
    for cxx_flag in cxx_flags.split(" ").into_iter() {
        ccbuild = ccbuild.flag(cxx_flag);
    }
    

    cbuild
    .include("./llama.cpp")
    .file("./llama.cpp/ggml.c")
    .cpp(false)
    .compile("ggml");

    let out_dir = env::var("OUT_DIR").unwrap();
    let ggml_obj = PathBuf::from(out_dir).join("llama.cpp/ggml.o");

    ccbuild
        .include("./llama.cpp/examples")
        .include("./llama.cpp")
        .shared_flag(true)
        .object(ggml_obj)
        .file("./llama.cpp/examples/common.cpp")
        .file("./llama.cpp/llama.cpp")
        .file("./binding.cpp")
        .cpp(true)
        .compile("binding");
}