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-rw-r--r--include/libHX/cast.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/libHX/cast.h b/include/libHX/cast.h
index cb2cba5..c8fe0ba 100644
--- a/include/libHX/cast.h
+++ b/include/libHX/cast.h
@@ -1,6 +1,12 @@
#ifndef _LIBHX_CAST_H
#define _LIBHX_CAST_H 1
+#ifndef BUILD_BUG_ON_EXPR
+# define BUILD_BUG_ON_EXPR(condition) (sizeof(char[1 - 2 * !!(condition)]) - 1)
+#endif
+#ifndef BUILD_BUG_ON
+# define BUILD_BUG_ON(condition) ((void)BUILD_BUG_ON_EXPR(condition))
+#endif
#ifdef __cplusplus
# ifndef const_cast
# define const_cast(T, x) const_cast<T>(x)