stdlib: Ensure C11 fns are only visible in C11

aligned_alloc, at_quick_exit, and quick_exit are new in C11 and C++11.
Only make these symbols visible in those versions, to avoid polluting
the namespace of C99 and POSIX 2008 sources.

1 files changed, 4 insertions, 0 deletions

diff --git a/include/stdlib.h b/include/stdlib.h
index 1d0ee846..6ac26741 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -41,14 +41,18 @@ void *malloc (size_t);
 void *calloc (size_t, size_t);
 void *realloc (void *, size_t);
 void free (void *);
+#if __STDC_VERSION__ >= 201112L || __cplusplus >= 201103L || defined(_BSD_SOURCE) || defined(_GNU_SOURCE)
 void *aligned_alloc(size_t, size_t);
+#endif
 
 _Noreturn void abort (void);
 int atexit (void (*) (void));
 _Noreturn void exit (int);
 _Noreturn void _Exit (int);
+#if __STDC_VERSION__ >= 201112L || __cplusplus >= 201103L || defined(_BSD_SOURCE) || defined(_GNU_SOURCE)
 int at_quick_exit (void (*) (void));
 _Noreturn void quick_exit (int);
+#endif
 
 char *getenv (const char *);