Add some build assert macros
Stolen from the linux kernel.
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/compiler/compiler.h b/compiler/compiler.h
index e1afcb4..40e857c 100644
--- a/compiler/compiler.h
+++ b/compiler/compiler.h
@@ -33,4 +33,26 @@
1; \
})
+#ifndef __compiletime_error
+#define __compiletime_error(message)
+#endif
+#ifndef __compiletime_error_fallback
+#define __compiletime_error_fallback(condition) do { } while (0)
+#endif
+
+#define __compiletime_assert(condition, msg, prefix, suffix) \
+ do { \
+ int __cond = !(condition); \
+ extern void prefix ## suffix(void) __compiletime_error(msg); \
+ if (__cond) \
+ prefix ## suffix(); \
+ __compiletime_error_fallback(__cond); \
+ } while (0)
+
+#define _compiletime_assert(condition, msg, prefix, suffix) \
+ __compiletime_assert(condition, msg, prefix, suffix)
+
+#define compiletime_assert(condition, msg) \
+ _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
+
#endif