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feat(runtime-c-api) Generate the C header file in OUT_DIR.

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This patch changes the directory where the C header files are
generated, from `CARGO_MANIFEST_DIR` to `OUT_DIR`. The goal is: When
`wasm-runtime-c-api` is used as a dependency of another Rust project,
then the C header files are accessible in the `target/` directory
(i.e. the `OUT_DIR`).

Also, since `rustc` has a `--out-dir` directory, it increases the
flexibility of this approach: The user can generate the C header files
where she wants.
This commit is contained in:
Ivan Enderlin
2019-03-05 15:52:18 +01:00
parent 28bb264266
commit 7c56d893c2
1 changed files with 9 additions and 3 deletions
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12
lib/runtime-c-api/build.rs
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@@ -1,7 +1,7 @@
#[cfg(feature = "generate-c-api-headers")] #[cfg(feature = "generate-c-api-headers")]
extern crate cbindgen; extern crate cbindgen;
use std::env; use std::{env, path::Path};
static CAPI_ENV_VAR: &str = "WASM_EMSCRIPTEN_GENERATE_C_API_HEADERS"; static CAPI_ENV_VAR: &str = "WASM_EMSCRIPTEN_GENERATE_C_API_HEADERS";
@@ -14,6 +14,12 @@ fn main() {
#[cfg(feature = "generate-c-api-headers")] #[cfg(feature = "generate-c-api-headers")]
fn build() { fn build() {
let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap(); let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
let out_dir = env::var("OUT_DIR").unwrap();
let out_path = Path::new(&out_dir);
let mut wasmer_h = out_path.to_path_buf();
wasmer_h.push("wasmer.h");
let mut wasmer_hh = out_path.to_path_buf();
wasmer_hh.push("wasmer.hh");
use cbindgen::Language; use cbindgen::Language;
cbindgen::Builder::new() cbindgen::Builder::new()
@@ -22,7 +28,7 @@ fn build() {
.with_include_guard("WASMER_H") .with_include_guard("WASMER_H")
.generate() .generate()
.expect("Unable to generate C bindings") .expect("Unable to generate C bindings")
.write_to_file("wasmer.h"); .write_to_file(wasmer_h);
cbindgen::Builder::new() cbindgen::Builder::new()
.with_crate(crate_dir) .with_crate(crate_dir)
@@ -30,7 +36,7 @@ fn build() {
.with_include_guard("WASMER_H") .with_include_guard("WASMER_H")
.generate() .generate()
.expect("Unable to generate C++ bindings") .expect("Unable to generate C++ bindings")
.write_to_file("wasmer.hh"); .write_to_file(wasmer_hh);
} }
#[cfg(not(feature = "generate-c-api-headers"))] #[cfg(not(feature = "generate-c-api-headers"))]