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-rw-r--r--src/prelude.h19
1 files changed, 15 insertions, 4 deletions
diff --git a/src/prelude.h b/src/prelude.h
index a23b167..390666b 100644
--- a/src/prelude.h
+++ b/src/prelude.h
@@ -182,14 +182,25 @@ extern const char bfs_version[];
#endif
/**
+ * Polyfill max_align_t if we don't already have it.
+ */
+#if !BFS_HAS_MAX_ALIGN_T
+typedef union {
+# ifdef __BIGGEST_ALIGNMENT__
+ alignas(__BIGGEST_ALIGNMENT__) char c;
+# else
+ long double ld;
+ long long ll;
+ void *ptr;
+# endif
+} max_align_t;
+#endif
+
+/**
* Alignment specifier that avoids false sharing.
*/
#define cache_align alignas(FALSE_SHARING_SIZE)
-#if __COSMOPOLITAN__
-typedef long double max_align_t;
-#endif
-
// Wrappers for attributes
/**