mir-sys 0.2.0

FFI bindings to MIR Project (https://github.com/vnmakarov/mir)
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97

// NB: Sync with submodule and root docs.
const GIT_COMMIT: &str = "e812cfb5d1325a19c532febe96bee2cdba217171";

fn main() {
    println!("cargo::rerun-if-changed=mir");

    let mut build = cc::Build::new();

    if !cfg!(feature = "io") {
        build.define("MIR_NO_IO", "1");
    }
    if !cfg!(feature = "scan") {
        build.define("MIR_NO_SCAN", "1");
    }
    if !cfg!(feature = "interp") {
        build.define("MIR_NO_INTERP", "1");
    }
    if cfg!(feature = "gen") {
        build.file("mir/mir-gen.c");
        if !cfg!(feature = "gen-debug") {
            build.define("MIR_NO_GEN_DEBUG", "1");
        }
    }
    if !cfg!(feature = "assert") && !cfg!(debug_assertions) {
        build.define("NDEBUG", "1");
    }

    // See: <https://github.com/vnmakarov/mir/blob/v1.0.0/GNUmakefile#L61>
    build
        .warnings(false)
        .define("GITCOMMIT", GIT_COMMIT)
        .pic(true)
        .flag("-std=gnu11")
        .flag("-Wno-abi")
        .flag("-fsigned-char")
        .flag_if_supported("-fno-tree-sra")
        .flag_if_supported("-fno-ipa-cp-clone")
        // Force long double == double to avoid ABI hazard.
        .flag("-mlong-double-64")
        .include("mir")
        .file("mir/mir.c")
        .compile("mir");

    println!("cargo::rustc-link-lib=m");
    println!("cargo::rustc-link-lib=dl");

    #[cfg(feature = "__internal_generate_sys")]
    generate();
}

#[cfg(feature = "__internal_generate_sys")]
fn generate() {
    bindgen::Builder::default()
        .header_contents("wrapper.h", r#"#include "mir/mir.h""#)
        .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
        // Hide private funcs and types: <https://github.com/vnmakarov/mir/blob/v1.0.0/mir.h#L637>
        .allowlist_var("MIR_.*")
        .allowlist_type("MIR_.*")
        .blocklist_type("MIR_code_reloc|MIR_code_reloc_t")
        .allowlist_function("MIR_.*|_MIR_init|_MIR_get_api_version")
        // Do not expand libc `FILE`.
        .opaque_type("FILE")
        .blocklist_type("FILE")
        .raw_line("use libc::FILE;")
        // No va_list support.
        .blocklist_function("MIR_interp_arr_varg")
        .blocklist_type(".*va_list.*")
        // Manual tweaks.
        .blocklist_type("MIR_mem_t|MIR_op_t.*|MIR_insn")
        .raw_line("use super::{MIR_op_t, MIR_insn};")
        .override_abi(bindgen::Abi::CUnwind, ".*")
        .merge_extern_blocks(true)
        // See above.
        .clang_arg("-mlong-double-64")
        .prepend_enum_name(false)
        .layout_tests(false)
        .generate()
        .expect("failed to bindgen mir.h")
        .write_to_file("src/bindings.rs")
        .expect("failed to write bindgen output");

    bindgen::Builder::default()
        .header_contents("wrapper.h", r#"#include "mir/mir-gen.h""#)
        .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
        .blocklist_type(".*")
        .allowlist_function("MIR_gen.*|MIR_set.*gen_interface")
        .raw_line("use super::*;")
        .raw_line("use libc::FILE;")
        .override_abi(bindgen::Abi::CUnwind, ".*")
        .merge_extern_blocks(true)
        // See above.
        .clang_arg("-mlong-double-64")
        .generate()
        .expect("failed to bindgen mir-gen.h")
        .write_to_file("src/bindings_gen.rs")
        .expect("failed to write bindgen output");
}