Wrap <stdlib.h> so that calls go direct and the symbols not in the

C standard are all weak.
Apply __{BEGIN,END}_HIDDEN_DECLS to gdtoa{,imp}.h, hiding the
arch-specific __strtorx, __ULtox_D2A, __strtorQ, __ULtoQ_D2A symbols.

42 files changed, 250 insertions, 52 deletions

diff --git a/lib/libc/arch/amd64/Symbols.list b/lib/libc/arch/amd64/Symbols.list
index c8692e1e33f..ed97a8ffbb3 100644
--- a/lib/libc/arch/amd64/Symbols.list
+++ b/lib/libc/arch/amd64/Symbols.list
@@ -1,6 +1,4 @@
-__ULtox_D2A
 __mcount
-__strtorx
 _fpgetmask
 _fpgetround
 _fpgetsticky
diff --git a/lib/libc/arch/amd64/gdtoa/strtold.c b/lib/libc/arch/amd64/gdtoa/strtold.c
index 20b50655348..61669581426 100644
--- a/lib/libc/arch/amd64/gdtoa/strtold.c
+++ b/lib/libc/arch/amd64/gdtoa/strtold.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: strtold.c,v 1.1 2008/09/07 20:36:07 martynas Exp $	*/
+/*	$OpenBSD: strtold.c,v 1.2 2015/09/13 08:31:47 guenther Exp $	*/
 /*-
  * Copyright (c) 2003 David Schultz <das@FreeBSD.ORG>
  * All rights reserved.
@@ -43,3 +43,4 @@ strtold(const char * __restrict s, char ** __restrict sp)
 	strtorx(s, sp, FLT_ROUNDS, &result);
 	return result;
 }
+DEF_STRONG(strtold);
diff --git a/lib/libc/arch/i386/Symbols.list b/lib/libc/arch/i386/Symbols.list
index 5d73def05f6..0c9be9b5ec5 100644
--- a/lib/libc/arch/i386/Symbols.list
+++ b/lib/libc/arch/i386/Symbols.list
@@ -1,8 +1,6 @@
-__ULtox_D2A
 __divsi3
 __fixdfsi
 __fixunsdfsi
 __mcount
-__strtorx
 __udivsi3
 mcount
diff --git a/lib/libc/arch/i386/gdtoa/strtold.c b/lib/libc/arch/i386/gdtoa/strtold.c
index 20b50655348..61669581426 100644
--- a/lib/libc/arch/i386/gdtoa/strtold.c
+++ b/lib/libc/arch/i386/gdtoa/strtold.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: strtold.c,v 1.1 2008/09/07 20:36:07 martynas Exp $	*/
+/*	$OpenBSD: strtold.c,v 1.2 2015/09/13 08:31:47 guenther Exp $	*/
 /*-
  * Copyright (c) 2003 David Schultz <das@FreeBSD.ORG>
  * All rights reserved.
@@ -43,3 +43,4 @@ strtold(const char * __restrict s, char ** __restrict sp)
 	strtorx(s, sp, FLT_ROUNDS, &result);
 	return result;
 }
+DEF_STRONG(strtold);
diff --git a/lib/libc/arch/mips64/Symbols.list b/lib/libc/arch/mips64/Symbols.list
index f88528faa1d..25155a2b788 100644
--- a/lib/libc/arch/mips64/Symbols.list
+++ b/lib/libc/arch/mips64/Symbols.list
@@ -1,8 +1,6 @@
 _GLOBAL_OFFSET_TABLE_
-__ULtoQ_D2A
 __multf3
 __pack_t
-__strtorQ
 __thenan_tf
 __unpack_t
 _fbss
diff --git a/lib/libc/arch/mips64/gdtoa/strtold.c b/lib/libc/arch/mips64/gdtoa/strtold.c
index 3a5e322f01a..9c25cb2f09f 100644
--- a/lib/libc/arch/mips64/gdtoa/strtold.c
+++ b/lib/libc/arch/mips64/gdtoa/strtold.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: strtold.c,v 1.1 2008/09/07 20:36:07 martynas Exp $	*/
+/*	$OpenBSD: strtold.c,v 1.2 2015/09/13 08:31:47 guenther Exp $	*/
 /*-
  * Copyright (c) 2003 David Schultz <das@FreeBSD.ORG>
  * All rights reserved.
@@ -43,3 +43,4 @@ strtold(const char * __restrict s, char ** __restrict sp)
 	strtorQ(s, sp, FLT_ROUNDS, &result);
 	return result;
 }
+DEF_STRONG(strtold);
diff --git a/lib/libc/arch/sparc64/Symbols.list b/lib/libc/arch/sparc64/Symbols.list
index 750c688f4df..c34776bbc62 100644
--- a/lib/libc/arch/sparc64/Symbols.list
+++ b/lib/libc/arch/sparc64/Symbols.list
@@ -49,7 +49,6 @@ _Qp_sub
 _Qp_uitoq
 _Qp_uxtoq
 _Qp_xtoq
-__ULtoQ_D2A
 __builtin_saveregs
 __dtoul
 __fpu_add
@@ -81,5 +80,4 @@ __fpu_xtof
 __ftoul
 __plt_end
 __plt_start
-__strtorQ
 _mcount
diff --git a/lib/libc/arch/sparc64/gdtoa/strtold.c b/lib/libc/arch/sparc64/gdtoa/strtold.c
index ecbfd5507fa..9c25cb2f09f 100644
--- a/lib/libc/arch/sparc64/gdtoa/strtold.c
+++ b/lib/libc/arch/sparc64/gdtoa/strtold.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: strtold.c,v 1.1 2008/09/07 20:36:08 martynas Exp $	*/
+/*	$OpenBSD: strtold.c,v 1.2 2015/09/13 08:31:47 guenther Exp $	*/
 /*-
  * Copyright (c) 2003 David Schultz <das@FreeBSD.ORG>
  * All rights reserved.
@@ -43,3 +43,4 @@ strtold(const char * __restrict s, char ** __restrict sp)
 	strtorQ(s, sp, FLT_ROUNDS, &result);
 	return result;
 }
+DEF_STRONG(strtold);
diff --git a/lib/libc/arch/vax/gdtoa/strtof.c b/lib/libc/arch/vax/gdtoa/strtof.c
index 7406440582c..cc129e8e0c2 100644
--- a/lib/libc/arch/vax/gdtoa/strtof.c
+++ b/lib/libc/arch/vax/gdtoa/strtof.c
@@ -73,3 +73,4 @@ strtof(CONST char *s, char **sp)
 		u.L[0] |= 0x00008000L;
 	return u.f;
 	}
+DEF_STRONG(strtof);
diff --git a/lib/libc/crypt/arc4random.c b/lib/libc/crypt/arc4random.c
index 5afc6a15ab0..8a4ecc9e893 100644
--- a/lib/libc/crypt/arc4random.c
+++ b/lib/libc/crypt/arc4random.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: arc4random.c,v 1.53 2015/09/10 18:53:50 bcook Exp $	*/
+/*	$OpenBSD: arc4random.c,v 1.54 2015/09/13 08:31:47 guenther Exp $	*/
 
 /*
  * Copyright (c) 1996, David Mazieres <dm@uun.org>
@@ -186,6 +186,7 @@ arc4random(void)
 	_ARC4_UNLOCK();
 	return val;
 }
+DEF_WEAK(arc4random);
 
 void
 arc4random_buf(void *buf, size_t n)
@@ -194,3 +195,4 @@ arc4random_buf(void *buf, size_t n)
 	_rs_random_buf(buf, n);
 	_ARC4_UNLOCK();
 }
+DEF_WEAK(arc4random_buf);
diff --git a/lib/libc/crypt/arc4random_uniform.c b/lib/libc/crypt/arc4random_uniform.c
index 1aa9a622f1d..23a15e34fd5 100644
--- a/lib/libc/crypt/arc4random_uniform.c
+++ b/lib/libc/crypt/arc4random_uniform.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: arc4random_uniform.c,v 1.1 2014/07/12 13:24:54 deraadt Exp $	*/
+/*	$OpenBSD: arc4random_uniform.c,v 1.2 2015/09/13 08:31:47 guenther Exp $	*/
 
 /*
  * Copyright (c) 2008, Damien Miller <djm@openbsd.org>
@@ -54,3 +54,4 @@ arc4random_uniform(uint32_t upper_bound)
 
 	return r % upper_bound;
 }
+DEF_WEAK(arc4random_uniform);
diff --git a/lib/libc/gdtoa/gdtoa.h b/lib/libc/gdtoa/gdtoa.h
index 9e1cea07cfd..a883194012a 100644
--- a/lib/libc/gdtoa/gdtoa.h
+++ b/lib/libc/gdtoa/gdtoa.h
@@ -113,6 +113,7 @@ extern float  strtof ANSI((CONST char *, char **));
 extern double strtod ANSI((CONST char *, char **));
 extern int __strtodg ANSI((CONST char*, char**, FPI*, Long*, ULong*));
 
+__BEGIN_HIDDEN_DECLS
 extern char*	__g_ddfmt  ANSI((char*, double*, int, size_t));
 extern char*	__g_dfmt   ANSI((char*, double*, int, size_t));
 extern char*	__g_ffmt   ANSI((char*, float*,  int, size_t));
@@ -148,6 +149,7 @@ extern int	__strtopxL ANSI((CONST char*, char**, void*));
 #define __strtopx(s,se,x) strtorx(s,se,1,x)
 #define __strtopxL(s,se,x) strtorxL(s,se,1,x)
 #endif
+__END_HIDDEN_DECLS
 
 #ifdef __cplusplus
 }
diff --git a/lib/libc/gdtoa/gdtoaimp.h b/lib/libc/gdtoa/gdtoaimp.h
index 8823aa8f197..823f2a9b113 100644
--- a/lib/libc/gdtoa/gdtoaimp.h
+++ b/lib/libc/gdtoa/gdtoaimp.h
@@ -566,6 +566,7 @@ extern void memcpy_D2A ANSI((void*, const void*, size_t));
 #define trailz __trailz_D2A
 #define ulp __ulp_D2A
 
+__BEGIN_HIDDEN_DECLS
  extern char *dtoa_result;
  extern CONST double bigtens[], tens[], tinytens[];
  extern unsigned char hexdig[];
@@ -585,8 +586,6 @@ extern void memcpy_D2A ANSI((void*, const void*, size_t));
  extern Bigint *d2b ANSI((double, int*, int*));
  extern void decrement ANSI((Bigint*));
  extern Bigint *diff ANSI((Bigint*, Bigint*));
- extern char *dtoa ANSI((double d, int mode, int ndigits,
-			int *decpt, int *sign, char **rve));
  extern char *g__fmt ANSI((char*, char*, char*, int, ULong, size_t));
  extern int gethex ANSI((CONST char**, FPI*, Long*, Bigint**, int));
  extern void __hexdig_init_D2A(Void);
@@ -609,10 +608,10 @@ extern void memcpy_D2A ANSI((void*, const void*, size_t));
  extern Bigint *set_ones ANSI((Bigint*, int));
  extern char *strcp ANSI((char*, const char*));
  extern int strtoIg ANSI((CONST char*, char**, FPI*, Long*, Bigint**, int*));
- extern double strtod ANSI((const char *s00, char **se));
  extern Bigint *sum ANSI((Bigint*, Bigint*));
  extern int trailz ANSI((Bigint*));
  extern double ulp ANSI((U*));
+__END_HIDDEN_DECLS
 
 #ifdef __cplusplus
 }
diff --git a/lib/libc/gdtoa/strtod.c b/lib/libc/gdtoa/strtod.c
index ded47d86248..ac2283c6249 100644
--- a/lib/libc/gdtoa/strtod.c
+++ b/lib/libc/gdtoa/strtod.c
@@ -1102,4 +1102,4 @@ strtod
 		*se = (char *)s;
 	return sign ? -dval(&rv) : dval(&rv);
 	}
-
+DEF_STRONG(strtod);
diff --git a/lib/libc/gdtoa/strtof.c b/lib/libc/gdtoa/strtof.c
index 224491b50f3..914e2182a92 100644
--- a/lib/libc/gdtoa/strtof.c
+++ b/lib/libc/gdtoa/strtof.c
@@ -79,3 +79,4 @@ strtof(CONST char *s, char **sp)
 		u.L[0] |= 0x80000000L;
 	return u.f;
 	}
+DEF_STRONG(strtof);
diff --git a/lib/libc/gdtoa/strtold.c b/lib/libc/gdtoa/strtold.c
index 0de6d88c008..7df15c0e66b 100644
--- a/lib/libc/gdtoa/strtold.c
+++ b/lib/libc/gdtoa/strtold.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: strtold.c,v 1.1 2008/09/07 20:36:08 martynas Exp $	*/
+/*	$OpenBSD: strtold.c,v 1.2 2015/09/13 08:31:47 guenther Exp $	*/
 /*-
  * Copyright (c) 2003 David Schultz <das@FreeBSD.ORG>
  * All rights reserved.
@@ -38,3 +38,4 @@ strtold(const char * __restrict s, char ** __restrict sp)
 {
 	return strtod(s, sp);
 }
+DEF_STRONG(strtold);
diff --git a/lib/libc/gen/devname.c b/lib/libc/gen/devname.c
index 7518c91cc8b..1009be8b0ae 100644
--- a/lib/libc/gen/devname.c
+++ b/lib/libc/gen/devname.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: devname.c,v 1.11 2015/08/26 01:54:09 guenther Exp $ */
+/*	$OpenBSD: devname.c,v 1.12 2015/09/13 08:31:47 guenther Exp $ */
 /*
  * Copyright (c) 1989, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -106,3 +106,4 @@ devname(dev_t dev, mode_t type)
 	}
 	return (name ? name : "??");
 }
+DEF_WEAK(devname);
diff --git a/lib/libc/gen/getcap.c b/lib/libc/gen/getcap.c
index 797ddb0cecd..fff16280c49 100644
--- a/lib/libc/gen/getcap.c
+++ b/lib/libc/gen/getcap.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: getcap.c,v 1.31 2014/09/15 06:15:48 guenther Exp $	*/
+/*	$OpenBSD: getcap.c,v 1.32 2015/09/13 08:31:47 guenther Exp $	*/
 /*-
  * Copyright (c) 1992, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -76,6 +76,7 @@ cgetusedb(int new_usedb)
 	usedb = new_usedb;
 	return(old_usedb);
 }
+DEF_WEAK(cgetusedb);
 
 /*
  * Cgetset() allows the addition of a user specified buffer to be added
@@ -99,6 +100,7 @@ cgetset(const char *ent)
 	memcpy(toprec, ent, topreclen + 1);
 	return (0);
 }
+DEF_WEAK(cgetset);
 
 /*
  * Cgetcap searches the capability record buf for the capability cap with
@@ -153,6 +155,7 @@ cgetcap(char *buf, const char *cap, int type)
 	}
 	/* NOTREACHED */
 }
+DEF_WEAK(cgetcap);
 
 /*
  * Cgetent extracts the capability record name from the NULL terminated file
@@ -170,6 +173,7 @@ cgetent(char **buf, char **db_array, const char *name)
 
 	return (getent(buf, &dummy, db_array, NULL, name, 0, NULL));
 }
+DEF_WEAK(cgetent);
 
 /*
  * Getent implements the functions of cgetent.  If fp is non-NULL,
@@ -623,6 +627,7 @@ cgetmatch(char *buf, const char *name)
 					break;	/* found next name */
 	}
 }
+DEF_WEAK(cgetmatch);
 
 int
 cgetfirst(char **buf, char **db_array)
@@ -631,6 +636,7 @@ cgetfirst(char **buf, char **db_array)
 	(void)cgetclose();
 	return (cgetnext(buf, db_array));
 }
+DEF_WEAK(cgetfirst);
 
 static FILE *pfp;
 static int slash;
@@ -649,6 +655,7 @@ cgetclose(void)
 	slash = 0;
 	return(0);
 }
+DEF_WEAK(cgetclose);
 
 /*
  * Cgetnext() gets either the first or next entry in the logical database
@@ -799,6 +806,7 @@ done:
 
 	return (status);
 }
+DEF_WEAK(cgetnext);
 
 /*
  * Cgetstr retrieves the value of the string capability cap from the
@@ -931,6 +939,7 @@ cgetstr(char *buf, const char *cap, char **str)
 	*str = mem;
 	return (len);
 }
+DEF_WEAK(cgetstr);
 
 /*
  * Cgetustr retrieves the value of the string capability cap from the
@@ -1013,6 +1022,7 @@ cgetustr(char *buf, const char *cap, char **str)
 	*str = mem;
 	return (len);
 }
+DEF_WEAK(cgetustr);
 
 /*
  * Cgetnum retrieves the value of the numeric capability cap from the
@@ -1077,6 +1087,7 @@ cgetnum(char *buf, const char *cap, long *num)
 	*num = n;
 	return (0);
 }
+DEF_WEAK(cgetnum);
 
 /*
  * Compare name field of record.
diff --git a/lib/libc/hidden/stdlib.h b/lib/libc/hidden/stdlib.h
new file mode 100644
index 00000000000..c57d4cd488c
--- /dev/null
+++ b/lib/libc/hidden/stdlib.h
@@ -0,0 +1,158 @@
+/*	$OpenBSD: stdlib.h,v 1.1 2015/09/13 08:31:47 guenther Exp $	*/
+/*	$NetBSD: stdlib.h,v 1.25 1995/12/27 21:19:08 jtc Exp $	*/
+
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)stdlib.h	5.13 (Berkeley) 6/4/91
+ */
+
+#ifndef _LIBC_STDLIB_H_
+#define _LIBC_STDLIB_H_
+
+#include_next <stdlib.h>
+
+__BEGIN_HIDDEN_DECLS
+char	*__findenv(const char *, int, int *);
+__END_HIDDEN_DECLS
+
+extern PROTO_NORMAL(__mb_cur_max);
+/*extern PROTO_NORMAL(suboptarg);*/
+
+PROTO_STD_DEPRECATED(_Exit);
+PROTO_DEPRECATED(a64l);
+PROTO_NORMAL(abort);
+PROTO_NORMAL(abs);
+PROTO_NORMAL(arc4random);
+PROTO_NORMAL(arc4random_buf);
+PROTO_NORMAL(arc4random_uniform);
+/*PROTO_NORMAL(atexit);			actually in csu */
+PROTO_STD_DEPRECATED(atof);
+PROTO_NORMAL(atoi);
+PROTO_STD_DEPRECATED(atol);
+PROTO_STD_DEPRECATED(atoll);
+PROTO_STD_DEPRECATED(bsearch);
+PROTO_NORMAL(calloc);
+PROTO_NORMAL(cgetcap);
+PROTO_NORMAL(cgetclose);
+PROTO_NORMAL(cgetent);
+PROTO_NORMAL(cgetfirst);
+PROTO_NORMAL(cgetmatch);
+PROTO_NORMAL(cgetnext);
+PROTO_NORMAL(cgetnum);
+PROTO_NORMAL(cgetset);
+PROTO_NORMAL(cgetstr);
+PROTO_NORMAL(cgetusedb);
+PROTO_NORMAL(cgetustr);
+PROTO_DEPRECATED(daemon);
+PROTO_NORMAL(devname);
+PROTO_NORMAL(div);
+PROTO_DEPRECATED(drand48);
+PROTO_DEPRECATED(ecvt);
+PROTO_NORMAL(erand48);
+PROTO_NORMAL(exit);
+PROTO_DEPRECATED(fcvt);
+PROTO_NORMAL(free);
+PROTO_DEPRECATED(gcvt);
+PROTO_DEPRECATED(getbsize);
+PROTO_NORMAL(getenv);
+PROTO_DEPRECATED(getloadavg);
+PROTO_DEPRECATED(getprogname);
+PROTO_DEPRECATED(getsubopt);
+PROTO_DEPRECATED(grantpt);
+PROTO_DEPRECATED(heapsort);
+PROTO_DEPRECATED(initstate);
+PROTO_DEPRECATED(jrand48);
+PROTO_DEPRECATED(l64a);
+PROTO_STD_DEPRECATED(labs);
+PROTO_DEPRECATED(lcong48);
+PROTO_NORMAL(lcong48_deterministic);
+PROTO_DEPRECATED(ldiv);
+PROTO_STD_DEPRECATED(llabs);
+PROTO_STD_DEPRECATED(lldiv);
+PROTO_DEPRECATED(lrand48);
+PROTO_NORMAL(malloc);
+PROTO_STD_DEPRECATED(mblen);
+PROTO_STD_DEPRECATED(mbstowcs);
+PROTO_STD_DEPRECATED(mbtowc);
+PROTO_DEPRECATED(mergesort);
+PROTO_DEPRECATED(mkdtemp);
+PROTO_NORMAL(mkostemp);
+PROTO_DEPRECATED(mkostemps);
+PROTO_NORMAL(mkstemp);
+PROTO_DEPRECATED(mkstemps);
+PROTO_DEPRECATED(mktemp);
+PROTO_DEPRECATED(mrand48);
+PROTO_DEPRECATED(nrand48);
+PROTO_NORMAL(posix_memalign);
+PROTO_DEPRECATED(posix_openpt);
+PROTO_DEPRECATED(ptsname);
+PROTO_NORMAL(putenv);
+PROTO_DEPRECATED(qabs);
+PROTO_DEPRECATED(qdiv);
+PROTO_NORMAL(qsort);
+PROTO_DEPRECATED(radixsort);
+PROTO_STD_DEPRECATED(rand);
+PROTO_NORMAL(rand_r);
+PROTO_DEPRECATED(random);
+PROTO_NORMAL(realloc);
+PROTO_NORMAL(reallocarray);
+PROTO_DEPRECATED(realpath);
+PROTO_DEPRECATED(seed48);
+PROTO_DEPRECATED(seed48_deterministic);
+PROTO_NORMAL(setenv);
+PROTO_DEPRECATED(setproctitle);
+PROTO_DEPRECATED(setprogname);
+PROTO_DEPRECATED(setstate);
+PROTO_DEPRECATED(sradixsort);
+PROTO_DEPRECATED(srand);
+PROTO_DEPRECATED(srand_deterministic);
+PROTO_DEPRECATED(srand48);
+PROTO_NORMAL(srand48_deterministic);
+PROTO_DEPRECATED(srandom);
+PROTO_DEPRECATED(srandom_deterministic);
+PROTO_DEPRECATED(srandomdev);
+PROTO_NORMAL(strtod);
+PROTO_NORMAL(strtof);
+PROTO_NORMAL(strtol);
+PROTO_NORMAL(strtold);
+PROTO_NORMAL(strtoll);
+PROTO_NORMAL(strtonum);
+/*PROTO_NORMAL(strtoq);		alias of strtoll */
+PROTO_NORMAL(strtoul);
+PROTO_NORMAL(strtoull);
+/*PROTO_NORMAL(strtouq);	alias of strtoull */
+PROTO_NORMAL(system);
+PROTO_DEPRECATED(ttyslot);
+PROTO_DEPRECATED(unlockpt);
+PROTO_NORMAL(unsetenv);
+PROTO_STD_DEPRECATED(valloc);
+PROTO_STD_DEPRECATED(wcstombs);
+PROTO_STD_DEPRECATED(wctomb);
+
+#endif /* _LIBC_STDLIB_H_ */
diff --git a/lib/libc/hidden/unistd.h b/lib/libc/hidden/unistd.h
index 66c0b0ae335..c4cc9a1def4 100644
--- a/lib/libc/hidden/unistd.h
+++ b/lib/libc/hidden/unistd.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: unistd.h,v 1.3 2015/09/12 14:56:50 guenther Exp $	*/
+/*	$OpenBSD: unistd.h,v 1.4 2015/09/13 08:31:47 guenther Exp $	*/
 /*
  * Copyright (c) 2015 Philip Guenther <guenther@openbsd.org>
  *
@@ -95,7 +95,7 @@ PROTO_NORMAL(link);
 PROTO_NORMAL(linkat);
 /*PROTO_CANCEL(lockf);*/
 PROTO_NORMAL(lseek);
-PROTO_NORMAL(mkdtemp);
+/*PROTO_DEPRECATED(mkdtemp);		use declaration from stdlib.h */
 PROTO_NORMAL(mkstemp);
 /*PROTO_DEPRECATED(mkstemps);		use declaration from stdlib.h */
 /*PROTO_DEPRECATED(mktemp);		use declaration from stdlib.h */
diff --git a/lib/libc/locale/__mb_cur_max.c b/lib/libc/locale/__mb_cur_max.c
index ec99fb6b399..8849a23c681 100644
--- a/lib/libc/locale/__mb_cur_max.c
+++ b/lib/libc/locale/__mb_cur_max.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: __mb_cur_max.c,v 1.2 2005/08/08 08:05:35 espie Exp $	*/
+/*	$OpenBSD: __mb_cur_max.c,v 1.3 2015/09/13 08:31:47 guenther Exp $	*/
 /*	$NetBSD: __mb_cur_max.c,v 1.2 2001/01/25 01:25:06 itojun Exp $	*/
 
 /*-
@@ -27,9 +27,9 @@
  * SUCH DAMAGE.
  */
 
-#include <sys/types.h>
+#include <stdlib.h>
 #include <limits.h>
 
 size_t __mb_cur_max = 1;
 size_t __mb_len_max_runtime = MB_LEN_MAX;
-
+DEF_STRONG(__mb_cur_max);
diff --git a/lib/libc/stdio/mktemp.c b/lib/libc/stdio/mktemp.c
index abb7c544d55..4b81d5d4715 100644
--- a/lib/libc/stdio/mktemp.c
+++ b/lib/libc/stdio/mktemp.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: mktemp.c,v 1.37 2015/09/12 14:56:50 guenther Exp $ */
+/*	$OpenBSD: mktemp.c,v 1.38 2015/09/13 08:31:47 guenther Exp $ */
 /*
  * Copyright (c) 1996-1998, 2008 Theo de Raadt
  * Copyright (c) 1997, 2008-2009 Todd C. Miller
@@ -145,6 +145,7 @@ mkostemp(char *path, int flags)
 {
 	return(mktemp_internal(path, 0, MKTEMP_FILE, flags));
 }
+DEF_WEAK(mkostemp);
 
 int
 mkstemps(char *path, int slen)
@@ -160,4 +161,3 @@ mkdtemp(char *path)
 	error = mktemp_internal(path, 0, MKTEMP_DIR, 0);
 	return(error ? NULL : path);
 }
-DEF_WEAK(mkdtemp);
diff --git a/lib/libc/stdlib/abort.c b/lib/libc/stdlib/abort.c
index dd057710ff2..903bfa78e18 100644
--- a/lib/libc/stdlib/abort.c
+++ b/lib/libc/stdlib/abort.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: abort.c,v 1.17 2014/05/14 21:54:20 tedu Exp $ */
+/*	$OpenBSD: abort.c,v 1.18 2015/09/13 08:31:47 guenther Exp $ */
 /*
  * Copyright (c) 1985 Regents of the University of California.
  * All rights reserved.
@@ -61,3 +61,4 @@ abort(void)
 	(void)raise(SIGABRT);
 	_exit(1);
 }
+DEF_STRONG(abort);
diff --git a/lib/libc/stdlib/abs.c b/lib/libc/stdlib/abs.c
index 5d2fbae69f1..0e39cc55367 100644
--- a/lib/libc/stdlib/abs.c
+++ b/lib/libc/stdlib/abs.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: abs.c,v 1.5 2005/08/08 08:05:36 espie Exp $ */
+/*	$OpenBSD: abs.c,v 1.6 2015/09/13 08:31:47 guenther Exp $ */
 /*-
  * Copyright (c) 1990 The Regents of the University of California.
  * All rights reserved.
@@ -35,3 +35,4 @@ abs(int j)
 {
 	return(j < 0 ? -j : j);
 }
+DEF_STRONG(abs);
diff --git a/lib/libc/stdlib/atoi.c b/lib/libc/stdlib/atoi.c
index b0842678e2f..7c9eb1331b0 100644
--- a/lib/libc/stdlib/atoi.c
+++ b/lib/libc/stdlib/atoi.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: atoi.c,v 1.5 2005/08/08 08:05:36 espie Exp $ */
+/*	$OpenBSD: atoi.c,v 1.6 2015/09/13 08:31:47 guenther Exp $ */
 /*
  * Copyright (c) 1988 Regents of the University of California.
  * All rights reserved.
@@ -35,3 +35,4 @@ atoi(const char *str)
 {
 	return((int)strtol(str, (char **)NULL, 10));
 }
+DEF_STRONG(atoi);
diff --git a/lib/libc/stdlib/div.c b/lib/libc/stdlib/div.c
index f7ac2db4b04..beaa428c7a8 100644
--- a/lib/libc/stdlib/div.c
+++ b/lib/libc/stdlib/div.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: div.c,v 1.5 2005/08/08 08:05:36 espie Exp $ */
+/*	$OpenBSD: div.c,v 1.6 2015/09/13 08:31:47 guenther Exp $ */
 /*
  * Copyright (c) 1990 Regents of the University of California.
  * All rights reserved.
@@ -69,3 +69,4 @@ div(int num, int denom)
 	}
 	return (r);
 }
+DEF_STRONG(div);
diff --git a/lib/libc/stdlib/erand48.c b/lib/libc/stdlib/erand48.c
index 2ffeaa6e710..20d6a2dd690 100644
--- a/lib/libc/stdlib/erand48.c
+++ b/lib/libc/stdlib/erand48.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: erand48.c,v 1.3 2005/08/08 08:05:36 espie Exp $ */
+/*	$OpenBSD: erand48.c,v 1.4 2015/09/13 08:31:47 guenther Exp $ */
 /*
  * Copyright (c) 1993 Martin Birgmeier
  * All rights reserved.
@@ -22,3 +22,4 @@ erand48(unsigned short xseed[3])
 	       ldexp((double) xseed[1], -32) +
 	       ldexp((double) xseed[2], -16);
 }
+DEF_WEAK(erand48);
diff --git a/lib/libc/stdlib/exit.c b/lib/libc/stdlib/exit.c
index 83fe3d2de56..d30b91ed46a 100644
--- a/lib/libc/stdlib/exit.c
+++ b/lib/libc/stdlib/exit.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: exit.c,v 1.12 2007/09/03 14:40:16 millert Exp $ */
+/*	$OpenBSD: exit.c,v 1.13 2015/09/13 08:31:47 guenther Exp $ */
 /*-
  * Copyright (c) 1990 The Regents of the University of California.
  * All rights reserved.
@@ -57,3 +57,4 @@ exit(int status)
 	__cxa_finalize(NULL);
 	_exit(status);
 }
+DEF_STRONG(exit);
diff --git a/lib/libc/stdlib/getenv.c b/lib/libc/stdlib/getenv.c
index fd8482e9e3c..6ddad9225a3 100644
--- a/lib/libc/stdlib/getenv.c
+++ b/lib/libc/stdlib/getenv.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: getenv.c,v 1.10 2010/08/23 22:31:50 millert Exp $ */
+/*	$OpenBSD: getenv.c,v 1.11 2015/09/13 08:31:47 guenther Exp $ */
 /*
  * Copyright (c) 1987, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -31,7 +31,6 @@
 #include <stdlib.h>
 #include <string.h>
 
-char *__findenv(const char *name, int len, int *offset);
 
 /*
  * __findenv --
@@ -79,3 +78,4 @@ getenv(const char *name)
 		;
 	return (__findenv(name, (int)(np - name), &offset));
 }
+DEF_STRONG(getenv);
diff --git a/lib/libc/stdlib/lcong48.c b/lib/libc/stdlib/lcong48.c
index 5b297ddbfc1..f03083e3c87 100644
--- a/lib/libc/stdlib/lcong48.c
+++ b/lib/libc/stdlib/lcong48.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: lcong48.c,v 1.5 2015/08/27 04:33:31 guenther Exp $ */
+/*	$OpenBSD: lcong48.c,v 1.6 2015/09/13 08:31:47 guenther Exp $ */
 /*
  * Copyright (c) 1993 Martin Birgmeier
  * All rights reserved.
@@ -33,3 +33,4 @@ lcong48_deterministic(unsigned short p[7])
 	__rand48_mult[2] = p[5];
 	__rand48_add = p[6];
 }
+DEF_WEAK(lcong48_deterministic);
diff --git a/lib/libc/stdlib/malloc.c b/lib/libc/stdlib/malloc.c
index 5e5dafbd179..0967fe3a088 100644
--- a/lib/libc/stdlib/malloc.c
+++ b/lib/libc/stdlib/malloc.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: malloc.c,v 1.174 2015/04/06 09:18:51 tedu Exp $	*/
+/*	$OpenBSD: malloc.c,v 1.175 2015/09/13 08:31:47 guenther Exp $	*/
 /*
  * Copyright (c) 2008, 2010, 2011 Otto Moerbeek <otto@drijf.net>
  * Copyright (c) 2012 Matthew Dempsky <matthew@openbsd.org>
@@ -211,6 +211,7 @@ extern char	*__progname;
 
 #ifdef MALLOC_STATS
 void malloc_dump(int);
+PROTO_NORMAL(malloc_dump);
 static void malloc_exit(void);
 #define CALLER	__builtin_return_address(0)
 #else
@@ -1186,6 +1187,7 @@ malloc(size_t size)
 		errno = saved_errno;
 	return r;
 }
+DEF_STRONG(malloc);
 
 static void
 ofree(void *p)
@@ -1289,6 +1291,7 @@ free(void *ptr)
 	_MALLOC_UNLOCK();
 	errno = saved_errno;
 }
+DEF_STRONG(free);
 
 
 static void *
@@ -1429,6 +1432,7 @@ realloc(void *ptr, size_t size)
 		errno = saved_errno;
 	return r;
 }
+DEF_STRONG(realloc);
 
 
 /*
@@ -1476,6 +1480,7 @@ calloc(size_t nmemb, size_t size)
 		errno = saved_errno;
 	return r;
 }
+DEF_STRONG(calloc);
 
 static void *
 mapalign(struct dir_info *d, size_t alignment, size_t sz, int zero_fill)
@@ -1609,6 +1614,7 @@ err:
 	errno = saved_errno;
 	return res;
 }
+DEF_STRONG(posix_memalign);
 
 #ifdef MALLOC_STATS
 
@@ -1853,6 +1859,7 @@ malloc_dump(int fd)
 	malloc_dump1(fd, pool);
 	errno = saved_errno;
 }
+DEF_WEAK(malloc_dump);
 
 static void
 malloc_exit(void)
diff --git a/lib/libc/stdlib/qsort.c b/lib/libc/stdlib/qsort.c
index 2a51c776349..1d9b1e91221 100644
--- a/lib/libc/stdlib/qsort.c
+++ b/lib/libc/stdlib/qsort.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: qsort.c,v 1.12 2014/06/12 14:54:25 millert Exp $ */
+/*	$OpenBSD: qsort.c,v 1.13 2015/09/13 08:31:47 guenther Exp $ */
 /*-
  * Copyright (c) 1992, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -149,3 +149,4 @@ loop:	SWAPINIT(a, es);
 	}
 /*		qsort(pn - r, r / es, es, cmp);*/
 }
+DEF_STRONG(qsort);
diff --git a/lib/libc/stdlib/rand.c b/lib/libc/stdlib/rand.c
index f163581e8d7..7054b81c647 100644
--- a/lib/libc/stdlib/rand.c
+++ b/lib/libc/stdlib/rand.c
@@ -39,6 +39,7 @@ rand_r(u_int *seed)
 	*seed = *seed * 1103515245 + 12345;
 	return (*seed % ((u_int)RAND_MAX + 1));
 }
+DEF_WEAK(rand_r);
 
 #if defined(APIWARN)
 __warn_references(rand_r,
diff --git a/lib/libc/stdlib/reallocarray.c b/lib/libc/stdlib/reallocarray.c
index ed3244e22f7..baea252a874 100644
--- a/lib/libc/stdlib/reallocarray.c
+++ b/lib/libc/stdlib/reallocarray.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: reallocarray.c,v 1.2 2014/12/08 03:45:00 bcook Exp $	*/
+/*	$OpenBSD: reallocarray.c,v 1.3 2015/09/13 08:31:47 guenther Exp $	*/
 /*
  * Copyright (c) 2008 Otto Moerbeek <otto@drijf.net>
  *
@@ -36,3 +36,4 @@ reallocarray(void *optr, size_t nmemb, size_t size)
 	}
 	return realloc(optr, size * nmemb);
 }
+DEF_WEAK(reallocarray);
diff --git a/lib/libc/stdlib/setenv.c b/lib/libc/stdlib/setenv.c
index 10b55445f76..e55a1feb6f9 100644
--- a/lib/libc/stdlib/setenv.c
+++ b/lib/libc/stdlib/setenv.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: setenv.c,v 1.15 2014/10/08 05:33:31 deraadt Exp $ */
+/*	$OpenBSD: setenv.c,v 1.16 2015/09/13 08:31:47 guenther Exp $ */
 /*
  * Copyright (c) 1987 Regents of the University of California.
  * All rights reserved.
@@ -32,8 +32,6 @@
 #include <stdlib.h>
 #include <string.h>
 
-char *__findenv(const char *name, int len, int *offset);
-
 extern char **environ;
 static char **lastenv;				/* last value of environ */
 
@@ -81,6 +79,7 @@ putenv(char *str)
 	environ[cnt + 1] = NULL;
 	return (0);
 }
+DEF_WEAK(putenv);
 
 /*
  * setenv --
@@ -147,6 +146,7 @@ setenv(const char *name, const char *value, int rewrite)
 		;
 	return (0);
 }
+DEF_WEAK(setenv);
 
 /*
  * unsetenv(name) --
@@ -178,3 +178,4 @@ unsetenv(const char *name)
 	}
 	return (0);
 }
+DEF_WEAK(unsetenv);
diff --git a/lib/libc/stdlib/srand48.c b/lib/libc/stdlib/srand48.c
index ce4b45225dc..d41391d4452 100644
--- a/lib/libc/stdlib/srand48.c
+++ b/lib/libc/stdlib/srand48.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: srand48.c,v 1.5 2015/08/27 04:33:31 guenther Exp $ */
+/*	$OpenBSD: srand48.c,v 1.6 2015/09/13 08:31:48 guenther Exp $ */
 /*
  * Copyright (c) 1993 Martin Birgmeier
  * All rights reserved.
@@ -35,3 +35,4 @@ srand48_deterministic(long seed)
 	__rand48_mult[2] = RAND48_MULT_2;
 	__rand48_add = RAND48_ADD;
 }
+DEF_WEAK(srand48_deterministic);
diff --git a/lib/libc/stdlib/strtol.c b/lib/libc/stdlib/strtol.c
index 86cec350864..49465e28ee8 100644
--- a/lib/libc/stdlib/strtol.c
+++ b/lib/libc/stdlib/strtol.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: strtol.c,v 1.10 2014/09/13 20:10:12 schwarze Exp $ */
+/*	$OpenBSD: strtol.c,v 1.11 2015/09/13 08:31:48 guenther Exp $ */
 /*
  * Copyright (c) 1990 The Regents of the University of California.
  * All rights reserved.
@@ -148,3 +148,4 @@ strtol(const char *nptr, char **endptr, int base)
 		*endptr = (char *) (any ? s - 1 : nptr);
 	return (acc);
 }
+DEF_STRONG(strtol);
diff --git a/lib/libc/stdlib/strtoll.c b/lib/libc/stdlib/strtoll.c
index cf82c8e1a6f..0ba51da77e8 100644
--- a/lib/libc/stdlib/strtoll.c
+++ b/lib/libc/stdlib/strtoll.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: strtoll.c,v 1.8 2014/09/13 20:10:12 schwarze Exp $ */
+/*	$OpenBSD: strtoll.c,v 1.9 2015/09/13 08:31:48 guenther Exp $ */
 /*
  * Copyright (c) 1992 The Regents of the University of California.
  * All rights reserved.
@@ -151,5 +151,6 @@ strtoll(const char *nptr, char **endptr, int base)
 		*endptr = (char *) (any ? s - 1 : nptr);
 	return (acc);
 }
+DEF_STRONG(strtoll);
 
-__strong_alias(strtoq, strtoll);
+__weak_alias(strtoq, strtoll);
diff --git a/lib/libc/stdlib/strtonum.c b/lib/libc/stdlib/strtonum.c
index 1aeee3467b8..ad22d1c30c5 100644
--- a/lib/libc/stdlib/strtonum.c
+++ b/lib/libc/stdlib/strtonum.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: strtonum.c,v 1.7 2013/04/17 18:40:58 tedu Exp $	*/
+/*	$OpenBSD: strtonum.c,v 1.8 2015/09/13 08:31:48 guenther Exp $	*/
 
 /*
  * Copyright (c) 2004 Ted Unangst and Todd Miller
@@ -63,3 +63,4 @@ strtonum(const char *numstr, long long minval, long long maxval,
 
 	return (ll);
 }
+DEF_WEAK(strtonum);
diff --git a/lib/libc/stdlib/strtoul.c b/lib/libc/stdlib/strtoul.c
index 2aa41b76e4a..98e8abcbdba 100644
--- a/lib/libc/stdlib/strtoul.c
+++ b/lib/libc/stdlib/strtoul.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: strtoul.c,v 1.9 2014/09/13 20:10:12 schwarze Exp $ */
+/*	$OpenBSD: strtoul.c,v 1.10 2015/09/13 08:31:48 guenther Exp $ */
 /*
  * Copyright (c) 1990 The Regents of the University of California.
  * All rights reserved.
@@ -107,3 +107,4 @@ strtoul(const char *nptr, char **endptr, int base)
 		*endptr = (char *) (any ? s - 1 : nptr);
 	return (acc);
 }
+DEF_STRONG(strtoul);
diff --git a/lib/libc/stdlib/strtoull.c b/lib/libc/stdlib/strtoull.c
index 846417630f9..a5d07de6cff 100644
--- a/lib/libc/stdlib/strtoull.c
+++ b/lib/libc/stdlib/strtoull.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: strtoull.c,v 1.7 2014/09/13 20:10:12 schwarze Exp $ */
+/*	$OpenBSD: strtoull.c,v 1.8 2015/09/13 08:31:48 guenther Exp $ */
 /*
  * Copyright (c) 1992 The Regents of the University of California.
  * All rights reserved.
@@ -109,5 +109,6 @@ strtoull(const char *nptr, char **endptr, int base)
 		*endptr = (char *) (any ? s - 1 : nptr);
 	return (acc);
 }
+DEF_STRONG(strtoull);
 
-__strong_alias(strtouq, strtoull);
+__weak_alias(strtouq, strtoull);
diff --git a/lib/libc/stdlib/system.c b/lib/libc/stdlib/system.c
index 14ddcae8d3e..2a50ec74900 100644
--- a/lib/libc/stdlib/system.c
+++ b/lib/libc/stdlib/system.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: system.c,v 1.8 2005/08/08 08:05:37 espie Exp $ */
+/*	$OpenBSD: system.c,v 1.9 2015/09/13 08:31:48 guenther Exp $ */
 /*
  * Copyright (c) 1988 The Regents of the University of California.
  * All rights reserved.
@@ -72,3 +72,4 @@ system(const char *command)
 	(void)signal(SIGQUIT, quitsave);
 	return (pid == -1 ? -1 : pstat);
 }
+DEF_STRONG(system);