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-rw-r--r--include/mach/message.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/mach/message.h b/include/mach/message.h
index 2177343a..816d257a 100644
--- a/include/mach/message.h
+++ b/include/mach/message.h
@@ -281,9 +281,14 @@ typedef struct {
} __attribute__ ((aligned (__alignof__ (uintptr_t)))) mach_msg_type_long_t;
#ifdef __x86_64__
+#ifdef __cplusplus
+static_assert (sizeof (mach_msg_type_t) == sizeof (mach_msg_type_long_t),
+ "mach_msg_type_t and mach_msg_type_long_t need to have the same size.");
+#else
_Static_assert (sizeof (mach_msg_type_t) == sizeof (mach_msg_type_long_t),
"mach_msg_type_t and mach_msg_type_long_t need to have the same size.");
#endif
+#endif
/*
* Known values for the msgt_name field.