mark the AVX-512 xof_many implementation as Unix-only

c/blake3_c_rust_bindings/src/lib.rs

@@ -291,6 +291,7 @@ pub mod ffi {
                 flags_end: u8,
                 out: *mut u8,
             );
+            #[cfg(unix)]
             pub fn blake3_xof_many_avx512(
                 cv: *const u32,
                 block: *const u8,

c/blake3_c_rust_bindings/src/test.rs

@@ -425,6 +425,7 @@ fn test_xof_many_portable() {
 }
 
 #[test]
+#[cfg(unix)]
 #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
 fn test_xof_many_avx512() {
     if !crate::avx512_detected() {

src/ffi_avx512.rs

@@ -61,6 +61,7 @@ pub unsafe fn hash_many<const N: usize>(
 }
 
 // Unsafe because this may only be called on platforms supporting AVX-512.
+#[cfg(unix)]
 pub unsafe fn xof_many(
     cv: &CVWords,
     block: &[u8; BLOCK_LEN],
@@ -109,6 +110,7 @@ pub mod ffi {
             flags_end: u8,
             out: *mut u8,
         );
+        #[cfg(unix)]
         pub fn blake3_xof_many_avx512(
             cv: *const u32,
             block: *const u8,
@@ -141,6 +143,7 @@ mod test {
         crate::test::test_hash_many_fn(hash_many, hash_many);
     }
 
+    #[cfg(unix)]
     #[test]
     fn test_xof_many() {
         if !crate::platform::avx512_detected() {

src/platform.rs

@@ -289,6 +289,7 @@ impl Platform {
         match self {
             // Safe because detect() checked for platform support.
             #[cfg(blake3_avx512_ffi)]
+            #[cfg(unix)]
             #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
             Platform::AVX512 => unsafe {
                 crate::avx512::xof_many(cv, block, block_len, counter, flags, out)