--- Libc/Libc-1158.50.2/include/stdlib.h
+++ Libc/Libc-1272.250.1/include/stdlib.h
@@ -59,6 +59,7 @@
 #define _STDLIB_H_
 
 #include <Availability.h>
+#include <sys/cdefs.h>
 
 #include <_types.h>
 #if !defined(_ANSI_SOURCE)
@@ -129,6 +130,8 @@
 #define LIBC_ABORT(f,...)	abort_report_np("%s:%s:%u: " f, __FILE__, __func__, __LINE__, ## __VA_ARGS__)
 //End-Libc
 
+#include <malloc/_malloc.h>
+
 __BEGIN_DECLS
 void	 abort(void) __dead2;
 int	 abs(int) __pure2;
@@ -142,10 +145,10 @@
 #endif /* !__DARWIN_NO_LONG_LONG */
 void	*bsearch(const void *__key, const void *__base, size_t __nel,
 	    size_t __width, int (* _Nonnull __compar)(const void *, const void *));
-void	*calloc(size_t __count, size_t __size) __result_use_check;
+/* calloc is now declared in _malloc.h */
 div_t	 div(int, int) __pure2;
 void	 exit(int) __dead2;
-void	 free(void *);
+/* free is now declared in _malloc.h */
 char	*getenv(const char *);
 long	 labs(long) __pure2;
 ldiv_t	 ldiv(long, long) __pure2;
@@ -154,15 +157,15 @@
 	 llabs(long long);
 lldiv_t	 lldiv(long long, long long);
 #endif /* !__DARWIN_NO_LONG_LONG */
-void	*malloc(size_t __size) __result_use_check;
+/* malloc is now declared in _malloc.h */
 int	 mblen(const char *__s, size_t __n);
 size_t	 mbstowcs(wchar_t * __restrict , const char * __restrict, size_t);
 int	 mbtowc(wchar_t * __restrict, const char * __restrict, size_t);
-int 	 posix_memalign(void **__memptr, size_t __alignment, size_t __size) __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_3_0);
+/* posix_memalign is now declared in _malloc.h */
 void	 qsort(void *__base, size_t __nel, size_t __width,
 	    int (* _Nonnull __compar)(const void *, const void *));
 int	 rand(void) __swift_unavailable("Use arc4random instead.");
-void	*realloc(void *__ptr, size_t __size) __result_use_check;
+/* realloc is now declared in _malloc.h */
 void	 srand(unsigned) __swift_unavailable("Use arc4random instead.");
 double	 strtod(const char *, char **) __DARWIN_ALIAS(strtod);
 float	 strtof(const char *, char **) __DARWIN_ALIAS(strtof);
@@ -190,7 +193,7 @@
 #endif
 
 __swift_unavailable_on("Use posix_spawn APIs or NSTask instead.", "Process spawning is unavailable")
-__OSX_AVAILABLE_BUT_DEPRECATED_MSG(__MAC_10_0,__MAC_NA,__IPHONE_2_0,__IPHONE_8_0, "Use posix_spawn APIs instead.")
+__API_AVAILABLE(macos(10.0)) __IOS_PROHIBITED
 __WATCHOS_PROHIBITED __TVOS_PROHIBITED
 int	 system(const char *) __DARWIN_ALIAS_C(system);
 //Begin-Libc
@@ -229,6 +232,11 @@
 long	 nrand48(unsigned short[3]) __swift_unavailable("Use arc4random instead.");
 int	 posix_openpt(int);
 char	*ptsname(int);
+
+#if (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE))
+int ptsname_r(int fildes, char *buffer, size_t buflen) __API_AVAILABLE(macos(10.13.4), ios(11.3), tvos(11.3), watchos(4.3));
+#endif
+
 //Begin-Libc
 #ifndef LIBC_ALIAS_PUTENV
 //End-Libc
@@ -384,7 +392,7 @@
 	    unsigned __endbyte);
 void	 sranddev(void);
 void	 srandomdev(void);
-void	*reallocf(void *__ptr, size_t __size);
+void	*reallocf(void *__ptr, size_t __size) __alloc_size(2);
 #if !__DARWIN_NO_LONG_LONG
 long long
 	 strtoq(const char *__str, char **__endptr, int __base);
@@ -392,7 +400,7 @@
 	 strtouq(const char *__str, char **__endptr, int __base);
 #endif /* !__DARWIN_NO_LONG_LONG */
 extern char *suboptarg;		/* getsubopt(3) external variable */
-void	*valloc(size_t);
+/* valloc is now declared in _malloc.h */
 #endif	/* !_ANSI_SOURCE && !_POSIX_SOURCE */
 
 /* Poison the following routines if -fshort-wchar is set */