td-shim: close compiler warnings

Signed-off-by: Jiaqi Gao <jiaqi.gao@intel.com>

td-shim/build.rs

@@ -41,7 +41,7 @@ fn run_command(mut cmd: Command) {
     }
 }
 
-#[cfg(target = "x86_64-unknown-none")]
+#[cfg(all(target_arch = "x86_64", target_os = "none"))]
 // clang is only required when building ring with the x86_64-unknown-none target. #109
 fn check_environment() -> Result<()> {
     use anyhow::anyhow;
@@ -152,7 +152,7 @@ fn real_main() -> Result<()> {
     // tell cargo when to re-run the script
     println!("cargo:rerun-if-changed=build.rs");
 
-    #[cfg(target = "x86_64-unknown-none")]
+    #[cfg(all(target_arch = "x86_64", target_os = "none"))]
     check_environment()?;
 
     println!(

td-shim/src/lib.rs

@@ -16,9 +16,6 @@ pub mod reset_vector;
 #[cfg(feature = "secure-boot")]
 pub mod secure_boot;
 
-#[cfg(feature = "fuzz")]
-pub mod secure_boot;
-
 // This GUID is used for ACPI GUID Extension HOB
 // Please refer to:
 // https://github.com/confidential-containers/td-shim/blob/main/doc/tdshim_spec.md#acpi-guid-extension-hob