expose memmem under baseline POSIX feature profile

[musl] / include / stddef.h

diff --git a/include/stddef.h b/include/stddef.h
index 9d52248..f25b863 100644 (file)
--- a/include/stddef.h
+++ b/include/stddef.h
@@ -1,11 +1,20 @@
 #ifndef _STDDEF_H
 #define _STDDEF_H
 
+#if __cplusplus >= 201103L
+#define NULL nullptr
+#elif defined(__cplusplus)
 #define NULL 0L
+#else
+#define NULL ((void*)0)
+#endif
 
 #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>