firmware/coreboot: Initial import via subtree merge

Signed-off-by: David Hendricks <dhendricks@fb.com>

firmware/coreboot/util/cbmem/compiler.h

@@ -0,0 +1,33 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2017 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __COMPILER_H__
+#define __COMPILER_H__
+
+#if !defined(__FreeBSD__)
+
+#if defined(__WIN32) || defined(__WIN64)
+#define __packed __attribute__((gcc_struct, packed))
+#else
+#define __packed __attribute__((packed))
+#endif
+
+#define __aligned(x) __attribute__((aligned(x)))
+#endif
+
+#define __always_unused __attribute__((unused))
+#define __must_check __attribute__((warn_unused_result))
+
+#endif