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Support for building ffmpeg with MinGW #76

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33 changes: 25 additions & 8 deletions build.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -193,29 +193,46 @@ fn build() -> io::Result<()> {
// Command's path is not relative to command's current_dir
let configure_path = source_dir.join("configure");
assert!(configure_path.exists());
let mut configure = Command::new(&configure_path);
let mut configure = Command::new("sh"); // use sh to allow Windows MinGW to run configure
configure.arg(&configure_path);
configure.current_dir(&source_dir);

configure.arg(format!("--prefix={}", search().to_string_lossy()));

let is_windows_gnu = env::var("TARGET").unwrap().ends_with("-windows-gnu");

if env::var("TARGET").unwrap() != env::var("HOST").unwrap() {
// Rust targets are subtly different than naming scheme for compiler prefixes.
// The cc crate has the messy logic of guessing a working prefix,
// and this is a messy way of reusing that logic.
let cc = cc::Build::new();
let compiler = cc.get_compiler();
let compiler = compiler.path().file_stem().unwrap().to_str().unwrap();
let suffix_pos = compiler.rfind('-').unwrap(); // cut off "-gcc"
let prefix = compiler[0..suffix_pos].trim_end_matches("-wr"); // "wr-c++" compiler
if !is_windows_gnu {
let cc = cc::Build::new();
let compiler = cc.get_compiler();
let compiler = compiler.path().file_stem().unwrap().to_str().unwrap();
let suffix_pos = compiler.rfind('-').unwrap(); // cut off "-gcc"
let prefix = compiler[0..suffix_pos].trim_end_matches("-wr"); // "wr-c++" compiler
configure.arg(format!("--cross-prefix={}-", prefix));
} else {
let target = env::var("TARGET").unwrap();
let suffix_pos = target.rfind('-').unwrap(); // cut off "-gcc"
let stem = &target[0..suffix_pos + 1];
configure.arg(format!(
"--cross-prefix={}",
stem.replace("pc-windows", "w64-mingw32")
));
}

configure.arg(format!("--cross-prefix={}-", prefix));
configure.arg(format!(
"--arch={}",
env::var("CARGO_CFG_TARGET_ARCH").unwrap()
));
configure.arg(format!(
"--target_os={}",
env::var("CARGO_CFG_TARGET_OS").unwrap()
if is_windows_gnu {
"mingw32".to_string()
} else {
env::var("CARGO_CFG_TARGET_OS").unwrap()
}
));
}

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