Run configure script in OUT_DIR

Author: withoutboats

build.rs

@@ -1,5 +1,6 @@
 use std::env;
-use std::path::PathBuf;
+use std::fs;
+use std::path::*;
 use std::process::Command;
 
 use cc::Build;
@@ -8,8 +9,8 @@ fn main() {
     let project = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap()).canonicalize().unwrap();
     let liburing = project.join("liburing");
 
-    // configure script
-    Command::new("./configure").current_dir(&liburing).output().expect("configure script failed");
+    // Run the configure script in OUT_DIR to get `compat.h`
+    let configured_include = configure(&liburing);
 
     let src = liburing.join("src");
 
@@ -19,10 +20,21 @@ fn main() {
                 .file(src.join("syscall.c"))
                 .file(src.join("register.c"))
                 .include(src.join("include"))
+                .include(&configured_include)
                 .extra_warnings(false)
                 .compile("uring");
 
     // (our additional, linkable C bindings)
-    Build::new().file(project.join("rusturing.c")).include(src.join("include"))
+    Build::new().file(project.join("rusturing.c"))
+                .include(src.join("include"))
+                .include(&configured_include)
                 .compile("rusturing");
 }
+
+fn configure(liburing: &Path) -> PathBuf {
+    let out_dir = PathBuf::from(env::var("OUT_DIR").unwrap()).canonicalize().unwrap();
+    fs::copy(liburing.join("configure"), out_dir.join("configure")).unwrap();
+    fs::create_dir_all(out_dir.join("src/include/liburing")).unwrap();
+    Command::new("./configure").current_dir(&out_dir).output().expect("configure script failed");
+    out_dir.join("src/include")
+}