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cross-compile support for build.rs

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This commit is contained in:
Mattis Marjak
2016-05-16 18:57:06 +03:00
parent 9e2285a4aa
commit c08a093dc3
1 changed files with 35 additions and 34 deletions
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69
build.rs
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@ -28,9 +28,11 @@ fn main() {
// If the MagickWand bindings are missing, generate them using
// rust-bindgen.
//
let bindings_path_str = concat!(env!("OUT_DIR"), "/bindings.rs");
if !Path::new(bindings_path_str).exists() {
let bindgen_path = Path::new(concat!(env!("OUT_DIR"), "/rust-bindgen"));
let out_dir = ::std::env::var("OUT_DIR").unwrap();
let bindings_path_str = out_dir.clone() + "/bindings.rs";
if !Path::new(&bindings_path_str).exists() {
let bindgen_path_str = out_dir.clone() + "/rust-bindgen";
let bindgen_path = Path::new(&bindgen_path_str);
if !bindgen_path.exists() {
Command::new("git")
.arg("clone")
@ -50,20 +52,30 @@ fn main() {
let mut bindgen_bin = bindgen_path.to_path_buf();
bindgen_bin.push("target/debug/bindgen");
if !bindgen_bin.exists() {
Command::new("cargo")
.arg("build")
.current_dir(bindgen_path)
.status().unwrap();
let mut cmd = Command::new("cargo");
cmd.arg("build").current_dir(bindgen_path);
println!("BINDGEN_BUILD={:?}", cmd);
cmd.status().unwrap();
}
// Get the compiler and linker flags for the MagickWand library.
let mw_cflags_output = Command::new("pkg-config")
.arg("--cflags")
.arg("MagickWand")
.output().unwrap();
let mw_cflags = std::str::from_utf8(&mw_cflags_output.stdout).unwrap().trim();
let mw_cflags_arr: Vec<&str> = mw_cflags.split_whitespace().collect();
println!("CFLAGS={:?}", mw_cflags_arr);
let mw_ldflags_output = Command::new("pkg-config")
.arg("--ldflags")
.arg("MagickWand")
.output().unwrap();
let mw_ldflags = std::str::from_utf8(&mw_ldflags_output.stdout).unwrap().trim();
let mw_ldflags_arr: Vec<&str> = mw_ldflags.split_whitespace().collect();
println!("LDFLAGS={:?}", mw_ldflags_arr);
// Ensure MagickWand-config is in the PATH and report clearly if not.
if !Command::new("which").arg("MagickWand-config").status().unwrap().success() {
panic!("MagickWand-config not in the PATH, please install ImageMagick");
}
let gen_h_path = concat!(env!("OUT_DIR"), "/gen.h");
let gen_h_path = out_dir.clone() + "/gen.h";
// Create the header file that rust-bindgen needs as input.
let mut gen_h = match File::create(gen_h_path) {
let mut gen_h = match File::create(&gen_h_path) {
Err(why) => panic!("could not create {} file: {}", gen_h_path, Error::description(&why)),
Ok(file) => file
};
@ -72,19 +84,6 @@ fn main() {
Ok(_) => ()
};
// Get the compiler and linker flags for the MagickWand library.
let mw_cflags_output = Command::new("MagickWand-config")
.arg("--cflags")
.output().unwrap();
let mw_cflags = std::str::from_utf8(&mw_cflags_output.stdout).unwrap().trim();
let mw_cflags_arr: Vec<&str> = mw_cflags.split_whitespace().collect();
let mw_ldflags_output = Command::new("MagickWand-config")
.arg("--ldflags")
.output().unwrap();
let mw_ldflags = std::str::from_utf8(&mw_ldflags_output.stdout).unwrap().trim();
let mw_ldflags_arr: Vec<&str> = mw_ldflags.split_whitespace().collect();
// Combine all of that in the invocation of rust-bindgen.
let mut cmd = &mut Command::new(bindgen_bin);
if cfg!(target_os = "macos") {
@ -96,27 +95,29 @@ fn main() {
panic!("missing {}, run xcode-select --install", LIBPATH);
}
cmd.env("DYLD_LIBRARY_PATH", LIBPATH);
// For the sake of easily building and testing on Mac, include the path
// to MagickWand. Chances are MagickWand is in /usr/local/lib, or
// somewhere else that rustc can find it.
println!("cargo:rustc-link-search=native=/usr/local/lib");
}
cmd.args(&mw_cflags_arr[..])
.arg("-builtins")
.arg("-o")
.arg(bindings_path_str)
.args(&mw_ldflags_arr[..])
.arg(gen_h_path)
.status().unwrap();
.arg(&gen_h_path);
println!("BINDING_GENERATION={:?}", cmd);
cmd.status().unwrap();
// how to get the output of the command...
// let output = Commad::new(...).output().unwrap();
// let out = std::str::from_utf8(&output.stdout).unwrap();
// println!("cargo:output={}", out);
// let err = std::str::from_utf8(&output.stderr).unwrap();
// println!("cargo:error={}", err);
match std::fs::remove_file(gen_h_path) {
match std::fs::remove_file(&gen_h_path) {
Err(why) => panic!("could not remove {}: {}", gen_h_path, Error::description(&why)),
Ok(_) => ()
}
}
// For the sake of easily building and testing on Mac, include the path
// to MagickWand. Chances are MagickWand is in /usr/local/lib, or
// somewhere else that rustc can find it.
println!("cargo:rustc-link-search=native=/usr/local/lib");
}