portable header guard

N-R-K · N-R-K · commit 080f8b33ce70 · 2024-11-29T15:53:51.000Z
diff --git a/chibihash64.h b/chibihash64.h
@@ -1,10 +1,11 @@
+#ifndef CHIBIHASH64__HGUARD
+#define CHIBIHASH64__HGUARD
 // small, fast 64 bit hash function (version 2).
 //
 // https://github.com/N-R-K/ChibiHash
 //
 // This is free and unencumbered software released into the public domain.
 // For more information, please refer to <https://unlicense.org/>
-#pragma once
 #include <stdint.h>
 #include <stddef.h>
 
@@ -77,3 +78,5 @@ chibihash64(const void *keyIn, ptrdiff_t len, uint64_t seed)
 
 	return x;
 }
+
+#endif // CHIBIHASH64__HGUARD
