build.rs: Use pkg-config to find header search paths for bindgen.

Cargo.toml

@@ -25,6 +25,8 @@ uuid = "1.0.0"
 [features]
 default = []
 deprecated = []
+pkg-config = ["libblkid-rs-sys/pkg-config"]
+static = ["pkg-config", "libblkid-rs-sys/static"]
 
 [lints.rust]
 warnings = { level = "deny" }

libblkid-rs-sys/Cargo.toml

@@ -14,6 +14,8 @@ keywords = ["storage"]
 
 [build-dependencies]
 cc = "1.0.45"
+pkg-config = "0.3.31"
+cfg-if = "1.0.0"
 
 [build-dependencies.bindgen]
 default-features = false
@@ -30,3 +32,7 @@ nonstandard_style = { level = "deny", priority = 4 }
 [lints.clippy]
 all = { level = "deny" }
 cargo = { level = "deny" , priority = 1}
+
+[features]
+static = ["pkg-config"]
+pkg-config = []

libblkid-rs-sys/build.rs

@@ -1,11 +1,34 @@
 use bindgen::Builder;
 
+use cfg_if::cfg_if;
 use std::{env, path::PathBuf};
 
-fn main() {
-    println!("cargo:rustc-link-lib=blkid");
+cfg_if! {
+    if #[cfg(feature = "pkg-config")] {
+        fn setup_bindings_builder() -> Builder {
+            let mut pkg_config = pkg_config::Config::new();
+            let pkg_config = pkg_config.atleast_version("2.33.2");
+            #[cfg(feature = "static")]
+            {
+                pkg_config.statik(true);
+            }
+            let libblkid = pkg_config.probe("blkid").expect("Failed to find libblkid?");
+
+            Builder::default().clang_args(libblkid
+                .include_paths
+                .iter()
+                .map(|include|format!("-I{}", include.display())))
+        }
+    }else {
+        fn setup_bindings_builder() -> Builder {
+            println!("cargo:rustc-link-lib=blkid");
+            Builder::default()
+        }
+    }
+}
 
-    let bindings = Builder::default()
+fn main() {
+    let bindings = setup_bindings_builder()
         .header("header.h")
         .size_t_is_usize(true)
         .generate()