1 use pkg_config::Config;
2 use std::env;
3 use std::path::PathBuf;
4
main()5 fn main() {
6 // Re-run build if any of these change
7 println!("cargo:rerun-if-changed=bindings/wrapper.hpp");
8 println!("cargo:rerun-if-changed=build.rs");
9
10 // We need to configure libchrome and libmodp_b64 settings as well
11 let libchrome = Config::new().probe("libchrome").unwrap();
12 let libchrome_paths = libchrome
13 .include_paths
14 .iter()
15 .map(|p| format!("-I{}", p.to_str().unwrap()))
16 .collect::<Vec<String>>();
17
18 let search_root = env::var("CXX_ROOT_PATH").unwrap();
19 let paths = vec![
20 "/system/",
21 "/system/btcore",
22 "/system/include",
23 "/system/include/hardware",
24 "/system/types",
25 ];
26
27 let bt_searches =
28 paths.iter().map(|tail| format!("-I{}{}", search_root, tail)).collect::<Vec<String>>();
29
30 // Also re-run bindgen if anything in the C++ source changes. Unfortunately the Rust source
31 // files also reside in the same directory so any changes of Rust files (and other non-C files
32 // actually) will cause topshim to be rebuild. The TOPSHIM_SHOULD_REBUILD env variable is a
33 // development tool to speed up build that can be set to "no" if topshim is not expected to be
34 // change.
35 let topshim_should_rebuild = match env::var("TOPSHIM_SHOULD_REBUILD") {
36 Err(_) => true,
37 Ok(should_rebuild) => should_rebuild != "no",
38 };
39 if topshim_should_rebuild {
40 println!("cargo:rerun-if-changed={}{}", search_root, "/system/");
41 }
42
43 // "-x" and "c++" must be separate due to a bug
44 let clang_args: Vec<&str> = vec!["-x", "c++", "-std=c++17"];
45
46 // The bindgen::Builder is the main entry point
47 // to bindgen, and lets you build up options for
48 // the resulting bindings.
49 let bindings = bindgen::Builder::default()
50 .clang_args(bt_searches)
51 .clang_args(libchrome_paths)
52 .clang_args(clang_args)
53 .enable_cxx_namespaces()
54 .size_t_is_usize(true)
55 .blocklist_function("RawAddress_.*")
56 .blocklist_function(".*Uuid_.*")
57 .allowlist_type("(bt_|bthh_|btgatt_|btsdp|bluetooth_sdp|btsock_|bthf_|btrc_).*")
58 .allowlist_type("sock_connect_signal_t")
59 .allowlist_function("(bt_|bthh_|btgatt_|btsdp|osi_property_get).*")
60 .allowlist_function("hal_util_.*")
61 // We must opaque out std:: in order to prevent bindgen from choking
62 .opaque_type("std::.*")
63 // Whitelist std::string though because we use it a lot
64 .allowlist_type("std::string")
65 .rustfmt_bindings(true)
66 .derive_debug(true)
67 .derive_partialeq(true)
68 .derive_eq(true)
69 .derive_default(true)
70 .header("bindings/wrapper.hpp")
71 .generate()
72 .expect("Unable to generate bindings");
73
74 // Write the bindings to the $OUT_DIR/bindings.rs file.
75 let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
76 bindings.write_to_file(out_path.join("bindings.rs")).expect("Couldn't write bindings!");
77 }
78