add max_align_t definition for C11 and C++11

[musl] / include / stddef.h

diff --git a/include/stddef.h b/include/stddef.h
index 0a32919..bd75385 100644 (file)
--- a/include/stddef.h
+++ b/include/stddef.h
@@ -10,6 +10,9 @@
 #define __NEED_ptrdiff_t
 #define __NEED_size_t
 #define __NEED_wchar_t
+#if __STDC_VERSION__ >= 201112L || __cplusplus >= 201103L
+#define __NEED_max_align_t
+#endif
 
 #include <bits/alltypes.h>