Freestanding headers

kernel/std/include/stdalign.h

@@ -0,0 +1,36 @@
+/* Copyright (C) 2022-2025 Mintsuki and contributors.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef __FREESTND_C_HDRS_STDALIGN_H
+#define __FREESTND_C_HDRS_STDALIGN_H 1
+
+#ifndef __cplusplus
+
+#if defined(__STDC_VERSION__) && __STDC_VERSION__ > 201710L
+    /* These do not need to be defined for C23+ */
+#else
+#  undef alignas
+#  define alignas _Alignas
+#  undef alignof
+#  define alignof _Alignof
+
+#  undef __alignof_is_defined
+#  define __alignof_is_defined 1
+#  undef __alignas_is_defined
+#  define __alignas_is_defined 1
+#endif
+
+#endif
+
+#endif