Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

swap to bindgen cli for no_std #2

Merged
merged 1 commit into from
Jan 28, 2020
Merged
Show file tree
Hide file tree
Changes from all commits
Commits
File filter

Filter by extension

Filter by extension


Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions .gitignore
Original file line number Diff line number Diff line change
@@ -1,2 +1,3 @@
**/target
Cargo.lock
wrapper.h
1 change: 0 additions & 1 deletion wasm3-sys/Cargo.toml
Original file line number Diff line number Diff line change
Expand Up @@ -13,5 +13,4 @@ wasi = []
libc = "^0.2"

[build-dependencies]
bindgen = "0.52"
cc = "1"
80 changes: 54 additions & 26 deletions wasm3-sys/build.rs
Original file line number Diff line number Diff line change
@@ -1,43 +1,71 @@
use std::env;
use std::ffi::{OsStr, OsString};
use std::fs;
use std::io;
use std::io::{BufWriter, Result, Write};
use std::path::PathBuf;

fn gen_bindings() -> io::Result<()> {
fn gen_bindings() -> Result<()> {
let whitelist_regex =
"((?:I|c_)?[Mm]3.*)|.*Page.*|Module_.*|EmitWord_impl|op_CallRawFunction|Compile_Function";
let bindgen = bindgen::builder()
.use_core()
.ctypes_prefix("libc")
.layout_tests(false)
.generate_comments(false)
.default_enum_style(bindgen::EnumVariation::ModuleConsts)
.whitelist_function(whitelist_regex)
.whitelist_type(whitelist_regex)
.whitelist_var(whitelist_regex)
.derive_debug(false);
let bindgen = fs::read_dir("wasm3/source")?
.filter_map(Result::ok)
.map(|entry| entry.path())
.filter(|path| path.extension().and_then(OsStr::to_str) == Some("h"))
.fold(bindgen, |bindgen, path| {
bindgen.header(path.to_str().unwrap())
});

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

let wrapper_file = root_path.join("wrapper.h");
let wrapper_file = wrapper_file.to_str().unwrap();

{
let file = fs::File::create(wrapper_file).unwrap();
let mut file = BufWriter::new(file);
for path in fs::read_dir("wasm3/source")
.unwrap()
.filter_map(Result::ok)
.map(|entry| entry.path())
.filter(|path| path.extension().and_then(OsStr::to_str) == Some("h"))
{
writeln!(file, "#include <{}>", path.to_str().unwrap()).unwrap();
}
}

let mut bindgen = std::process::Command::new("bindgen");

let bindgen = bindgen
.arg(wrapper_file)
.arg("--use-core")
.arg("--ctypes-prefix")
.arg("libc")
.arg("--no-layout-tests")
.arg("--no-doc-comments")
.arg("--whitelist-function")
.arg(whitelist_regex)
.arg("--whitelist-type")
.arg(whitelist_regex)
.arg("--whitelist-var")
.arg(whitelist_regex)
.arg("--no-derive-debug");

let bindgen = [
"f64", "f32", "u64", "i64", "u32", "i32", "u16", "i16", "u8", "i8",
]
.iter()
.fold(bindgen, |bindgen, &ty| bindgen.blacklist_type(ty));
.fold(bindgen, |bindgen, &ty| {
bindgen.arg("--blacklist-type").arg(ty)
});

let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
bindgen
.generate()
.expect("Unable to generate bindings")
.write_to_file(out_path.join("bindings.rs"))
let status = bindgen
.arg("-o")
.arg(out_path.join("bindings.rs").to_str().unwrap())
.status()
.expect("Unable to generate bindings");

if !status.success() {
panic!("Failed to run bindgen: {:?}", status);
}

Ok(())
}

fn main() -> io::Result<()> {
fn main() -> Result<()> {
gen_bindings()?;
// build
let mut cfg = cc::Build::new();
Expand Down