Proposed resolution:
This wording is relative to N4971.
Modify [depr.c.macros] as indicated:
-1- The header <stdalign.h> has the following macros: #define __alignas_is_defined 1 #define __alignof_is_defined 1
-1- The header <stdalign.h> has the following macros:
#define __alignas_is_defined 1 #define __alignof_is_defined 1