clamav-sys: Fix up Windows build

clamav-sys/build.rs

@@ -165,8 +165,11 @@ fn cargo_common() {
     println!("cargo:rerun-if-changed=wrapper.h");
 }
 
-#[cfg(windows)]
-pub fn main() {
+fn main() -> anyhow::Result<()> {
+    #[cfg(not(windows))]
+    let mut include_paths = vec![];
+
+    #[cfg(windows)]
     let include_paths = match vcpkg::find_package("clamav") {
         Ok(pkg) => pkg.include_paths,
         Err(err) => {
@@ -198,20 +201,6 @@ pub fn main() {
         }
     };
 
-    cargo_common();
-    generate_bindings(&|x: bindgen::Builder| -> bindgen::Builder {
-        let mut x = x;
-        for include_path in &include_paths {
-            x = x.clang_arg("-I").clang_arg(include_path.to_str().unwrap());
-        }
-        x
-    });
-}
-
-#[cfg(unix)]
-fn main() -> anyhow::Result<()> {
-    let mut include_paths = vec![];
-
     let mut output_path_intmod = PathBuf::from(env::var("OUT_DIR")?);
     output_path_intmod.push("sys.rs");
 
@@ -228,12 +217,15 @@ fn main() -> anyhow::Result<()> {
         // This crate is being referenced from an external project. Utilize the
         // system-installed copy of libclamav (as located using pkg-config).
 
-        let libclamav = pkg_config::Config::new()
-            .atleast_version("0.103")
-            .probe("libclamav")
-            .unwrap();
+        #[cfg(not(windows))]
+        {
+            let libclamav = pkg_config::Config::new()
+                .atleast_version("0.103")
+                .probe("libclamav")
+                .unwrap();
 
-        include_paths.extend_from_slice(&libclamav.include_paths);
+            include_paths.extend_from_slice(&libclamav.include_paths);
+        }
 
         // Build a vestigial `sys` module, as there will be no access to
         // internal APIs.