rafaelcaricio/lvgl-rs
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Compile to WASM using Emscripten #31

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rafaelcaricio merged 1 commit from emscripten into master 2020-09-22 18:54:48 +00:00
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1 changed files with 27 additions and 4 deletions
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31
lvgl-sys/build.rs
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@ -62,25 +62,48 @@ fn main() {
.include(&lv_config_dir)
.compile("lvgl");
let cc_args = [
let mut cc_args = vec![
"-DLV_CONF_INCLUDE_SIMPLE=1",
"-I",
lv_config_dir.to_str().unwrap(),
"-I",
vendor.to_str().unwrap(),
"-fvisibility=default",
];
// Set correct target triple for bindgen when cross-compiling
let target = env::var("TARGET").expect("Cargo build scripts always have TARGET");
let host = env::var("HOST").expect("Cargo build scripts always have HOST");
if target != host {
cc_args.push("-target");
cc_args.push(target.as_str());
}
let mut additional_args = Vec::new();
if target.ends_with("emscripten") {
if let Ok(em_path) = env::var("EMSDK") {
additional_args.push("-I".to_string());
rafaelcaricio commented 2020-09-22 08:33:53 +00:00 (Migrated from github.com)
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If it's not present we could show an error, tell users that they are missing to activate the Emscripten environment.

# Activate PATH and other environment variables in the current terminal
source ./emsdk_env.sh
If it's not present we could show an error, tell users that they are missing to activate the Emscripten environment. ``` # Activate PATH and other environment variables in the current terminal source ./emsdk_env.sh ```
additional_args.push(format!("{}/upstream/emscripten/system/include/libc", em_path));
additional_args.push("-I".to_string());
additional_args.push(format!("{}/upstream/emscripten/system/lib/libc/musl/arch/emscripten", em_path));
additional_args.push("-I".to_string());
additional_args.push(format!("{}/upstream/emscripten/system/include/SDL", em_path));
}
rafaelcaricio commented 2020-09-22 08:32:41 +00:00 (Migrated from github.com)
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This won't work on Windows...

This won't work on Windows...
}
let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
bindgen::Builder::default()
let bindings = bindgen::Builder::default()
.header(shims_dir.join("lvgl_sys.h").to_str().unwrap())
.layout_tests(false)
.use_core()
.rustfmt_bindings(true)
.ctypes_prefix("cty")
.clang_args(&cc_args)
.clang_args(&additional_args)
.generate()
.expect("Unable to generate bindings")
.write_to_file(out_path.join("bindings.rs"))
.expect("Unable to generate bindings");
bindings.write_to_file(out_path.join("bindings.rs"))
.expect("Can't write bindings!");
}