Detect CPU features at build time

.github/workflows/build_test.yml

@@ -21,7 +21,7 @@ jobs:
       run: cargo build --release
 
     - name: Test
-      run: cargo test --release --lib
+      run: cargo test --release
 
   build_test_x86_avx2:
     name: Build & Test X86 AVX2
@@ -37,7 +37,7 @@ jobs:
       run: cargo build --release
 
     - name: Test
-      run: cargo test --release --lib
+      run: cargo test --release
 
   build_test_arm:
     name: Build & Test ARM
@@ -50,4 +50,4 @@ jobs:
       run: cargo build --release
 
     - name: Test
-      run: cargo test --release --lib
+      run: cargo test --release

build.rs

@@ -2,10 +2,40 @@ extern crate rustc_version;
 use rustc_version::{version_meta, Channel};
 
 fn main() {
+
+    if let Err(e) = check_hardware_support() {
+        panic!("Gxhash build failed: {}", e);
+    }
+
     if version_meta().unwrap().channel == Channel::Nightly
     && cfg!(target_arch = "x86_64")
     && cfg!(target_feature = "avx2")
     && cfg!(target_feature = "vaes") {
         println!("cargo:rustc-cfg=hybrid");
     }
+}
+
+#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
+fn check_hardware_support() -> Result<(), Box<dyn std::error::Error>> {
+    if !std::is_x86_feature_detected!("aes") {
+        return Result::Err("CPU feature 'aes' is required")?;
+    }
+    if !std::is_x86_feature_detected!("sse2") {
+        return Result::Err("CPU feature 'sse2' is required")?;
+    }
+    return Ok(());
+}
+
+#[cfg(not(any(target_arch = "x86", target_arch = "x86_64")))]
+fn check_hardware_support() -> Result<(), Box<dyn std::error::Error>> {
+    if cfg!(any(target_arch = "arm", target_arch = "aarch64")) {
+        if cfg!(not(target_feature = "aes")) {
+            return Result::Err("CPU feature 'aes' is required")?;
+        }
+        if cfg!(not(target_feature = "neon")) {
+            return Result::Err("CPU feature 'neon' is required")?;
+        }
+        return Ok(());
+    }
+    return Result::Err(format!("Target arch '{}' is not supported", std::env::consts::ARCH))?;
 }

src/gxhash/platform/mod.rs

@@ -1,8 +1,8 @@
-#[cfg(all(any(target_arch = "arm", target_arch = "aarch64"), target_feature = "aes", target_feature = "neon"))]
+#[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
 #[path = "arm.rs"]
 mod platform;
 
-#[cfg(all(any(target_arch = "x86", target_arch = "x86_64"), target_feature = "aes", target_feature = "sse2"))]
+#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
 #[path = "x86.rs"]
 mod platform;