diff --git a/src/lib/libc/stdlib/strtoimax.c b/src/lib/libc/stdlib/strtoimax.c
index 2fc04e48..52403a72 100644
--- a/src/lib/libc/stdlib/strtoimax.c
+++ b/src/lib/libc/stdlib/strtoimax.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: strtoimax.c,v 1.2 2014/09/13 20:10:12 schwarze Exp $	*/
+/*	$OpenBSD: strtoimax.c,v 1.3 2015/09/12 16:23:14 guenther Exp $	*/
 /*
  * Copyright (c) 1992 The Regents of the University of California.
  * All rights reserved.
@@ -148,3 +148,4 @@ strtoimax(const char *nptr, char **endptr, int base)
 		*endptr = (char *) (any ? s - 1 : nptr);
 	return (acc);
 }
+DEF_STRONG(strtoimax);
diff --git a/src/lib/libc/stdlib/strtoumax.c b/src/lib/libc/stdlib/strtoumax.c
index c73f7e50..4c5e3349 100644
--- a/src/lib/libc/stdlib/strtoumax.c
+++ b/src/lib/libc/stdlib/strtoumax.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: strtoumax.c,v 1.2 2014/09/13 20:10:12 schwarze Exp $	*/
+/*	$OpenBSD: strtoumax.c,v 1.3 2015/09/12 16:23:14 guenther Exp $	*/
 /*
  * Copyright (c) 1992 The Regents of the University of California.
  * All rights reserved.
@@ -106,3 +106,4 @@ strtoumax(const char *nptr, char **endptr, int base)
 		*endptr = (char *) (any ? s - 1 : nptr);
 	return (acc);
 }
+DEF_STRONG(strtoumax);
diff --git a/src/lib/libc/string/wcscasecmp.c b/src/lib/libc/string/wcscasecmp.c
index b14997ee..b122e720 100644
--- a/src/lib/libc/string/wcscasecmp.c
+++ b/src/lib/libc/string/wcscasecmp.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wcscasecmp.c,v 1.2 2011/06/01 19:29:48 naddy Exp $ */
+/*	$OpenBSD: wcscasecmp.c,v 1.3 2015/09/12 16:23:14 guenther Exp $ */
 
 /*
  * Copyright (c) 2011 Marc Espie
@@ -41,6 +41,7 @@ wcscasecmp(const wchar_t *s1, const wchar_t *s2)
 	/* XXX assumes wchar_t = int */
 	return ((rune_t)l1 - (rune_t)l2);
 }
+DEF_WEAK(wcscasecmp);
 
 int
 wcsncasecmp(const wchar_t *s1, const wchar_t *s2, size_t n)
@@ -59,3 +60,4 @@ wcsncasecmp(const wchar_t *s1, const wchar_t *s2, size_t n)
 	} while (--n != 0);
 	return (0);
 }
+DEF_WEAK(wcsncasecmp);
diff --git a/src/lib/libc/string/wcscat.c b/src/lib/libc/string/wcscat.c
index a4841a97..5ddb510f 100644
--- a/src/lib/libc/string/wcscat.c
+++ b/src/lib/libc/string/wcscat.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wcscat.c,v 1.3 2005/08/08 08:05:37 espie Exp $	*/
+/*	$OpenBSD: wcscat.c,v 1.4 2015/09/12 16:23:14 guenther Exp $	*/
 /*	$NetBSD: wcscat.c,v 1.2 2001/01/03 14:29:36 lukem Exp $	*/
 
 /*-
@@ -53,3 +53,4 @@ wcscat(wchar_t *s1, const wchar_t *s2)
 	*q = '\0';
 	return s1;
 }
+DEF_STRONG(wcscat);
diff --git a/src/lib/libc/string/wcschr.c b/src/lib/libc/string/wcschr.c
index b84a2d32..231c7605 100644
--- a/src/lib/libc/string/wcschr.c
+++ b/src/lib/libc/string/wcschr.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wcschr.c,v 1.4 2008/08/23 05:34:36 djm Exp $	*/
+/*	$OpenBSD: wcschr.c,v 1.5 2015/09/12 16:23:14 guenther Exp $	*/
 /*	$NetBSD: wcschr.c,v 1.2 2001/01/03 14:29:36 lukem Exp $	*/
 
 /*-
@@ -48,3 +48,4 @@ wcschr(const wchar_t *s, wchar_t c)
 	}
 	/* NOTREACHED */
 }
+DEF_STRONG(wcschr);
diff --git a/src/lib/libc/string/wcscmp.c b/src/lib/libc/string/wcscmp.c
index 4a8f6ba3..42d6bca3 100644
--- a/src/lib/libc/string/wcscmp.c
+++ b/src/lib/libc/string/wcscmp.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wcscmp.c,v 1.4 2005/08/08 08:05:37 espie Exp $	*/
+/*	$OpenBSD: wcscmp.c,v 1.5 2015/09/12 16:23:14 guenther Exp $	*/
 /*	$NetBSD: wcscmp.c,v 1.5 2003/08/07 16:43:54 agc Exp $	*/
 
 /*-
@@ -49,3 +49,4 @@ wcscmp(const wchar_t *s1, const wchar_t *s2)
 	/* XXX assumes wchar_t = int */
 	return (*(const rune_t *)s1 - *(const rune_t *)--s2);
 }
+DEF_STRONG(wcscmp);
diff --git a/src/lib/libc/string/wcscspn.c b/src/lib/libc/string/wcscspn.c
index cf400924..23e78ab2 100644
--- a/src/lib/libc/string/wcscspn.c
+++ b/src/lib/libc/string/wcscspn.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wcscspn.c,v 1.3 2005/08/08 08:05:37 espie Exp $	*/
+/*	$OpenBSD: wcscspn.c,v 1.4 2015/09/12 16:23:14 guenther Exp $	*/
 /*	$NetBSD: wcscspn.c,v 1.2 2001/01/03 14:29:36 lukem Exp $	*/
 
 /*-
@@ -51,3 +51,4 @@ wcscspn(const wchar_t *s, const wchar_t *set)
 done:
 	return (p - s);
 }
+DEF_STRONG(wcscspn);
diff --git a/src/lib/libc/string/wcsdup.c b/src/lib/libc/string/wcsdup.c
index 085d1c44..36f19186 100644
--- a/src/lib/libc/string/wcsdup.c
+++ b/src/lib/libc/string/wcsdup.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wcsdup.c,v 1.2 2014/10/08 05:27:17 deraadt Exp $	*/
+/*	$OpenBSD: wcsdup.c,v 1.3 2015/09/12 16:23:14 guenther Exp $	*/
 /*	$NetBSD: wcsdup.c,v 1.3 2008/05/26 13:17:48 haad Exp $	*/
 
 /*
@@ -29,3 +29,4 @@ wcsdup(const wchar_t *str)
 
 	return (wmemcpy(copy, str, len));
 }
+DEF_WEAK(wcsdup);
diff --git a/src/lib/libc/string/wcslcat.c b/src/lib/libc/string/wcslcat.c
index 2dfe2aae..aa581466 100644
--- a/src/lib/libc/string/wcslcat.c
+++ b/src/lib/libc/string/wcslcat.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wcslcat.c,v 1.5 2015/01/15 03:54:12 millert Exp $	*/
+/*	$OpenBSD: wcslcat.c,v 1.6 2015/09/12 16:23:14 guenther Exp $	*/
 
 /*
  * Copyright (c) 1998, 2015 Todd C. Miller <Todd.Miller@courtesan.com>
@@ -53,3 +53,4 @@ wcslcat(wchar_t *dst, const wchar_t *src, size_t dsize)
 
 	return(dlen + (src - osrc));	/* count does not include NUL */
 }
+DEF_WEAK(wcslcat);
diff --git a/src/lib/libc/string/wcslcpy.c b/src/lib/libc/string/wcslcpy.c
index 1c481157..36a544a3 100644
--- a/src/lib/libc/string/wcslcpy.c
+++ b/src/lib/libc/string/wcslcpy.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wcslcpy.c,v 1.6 2015/01/15 03:54:12 millert Exp $	*/
+/*	$OpenBSD: wcslcpy.c,v 1.7 2015/09/12 16:23:14 guenther Exp $	*/
 
 /*
  * Copyright (c) 1998, 2015 Todd C. Miller <Todd.Miller@courtesan.com>
@@ -48,3 +48,4 @@ wcslcpy(wchar_t *dst, const wchar_t *src, size_t dsize)
 
 	return(src - osrc - 1);	/* count does not include NUL */
 }
+DEF_WEAK(wcslcpy);
diff --git a/src/lib/libc/string/wcslen.c b/src/lib/libc/string/wcslen.c
index c1de4a27..16d4bba1 100644
--- a/src/lib/libc/string/wcslen.c
+++ b/src/lib/libc/string/wcslen.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wcslen.c,v 1.3 2005/08/08 08:05:37 espie Exp $	*/
+/*	$OpenBSD: wcslen.c,v 1.4 2015/09/12 16:23:14 guenther Exp $	*/
 /*	$NetBSD: wcslen.c,v 1.2 2001/01/03 14:29:36 lukem Exp $	*/
 
 /*-
@@ -42,3 +42,4 @@ wcslen(const wchar_t *s)
 
 	return p - s;
 }
+DEF_STRONG(wcslen);
diff --git a/src/lib/libc/string/wcsncat.c b/src/lib/libc/string/wcsncat.c
index eb9a7015..2b4b9f0d 100644
--- a/src/lib/libc/string/wcsncat.c
+++ b/src/lib/libc/string/wcsncat.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wcsncat.c,v 1.3 2005/08/08 08:05:37 espie Exp $	*/
+/*	$OpenBSD: wcsncat.c,v 1.4 2015/09/12 16:23:14 guenther Exp $	*/
 /*	$NetBSD: wcsncat.c,v 1.2 2001/01/03 14:29:36 lukem Exp $	*/
 
 /*-
@@ -50,3 +50,4 @@ wcsncat(wchar_t *s1, const wchar_t *s2, size_t n)
 	*q = '\0';
 	return s1;
 }
+DEF_STRONG(wcsncat);
diff --git a/src/lib/libc/string/wcsncmp.c b/src/lib/libc/string/wcsncmp.c
index fb3c7057..bdaab33e 100644
--- a/src/lib/libc/string/wcsncmp.c
+++ b/src/lib/libc/string/wcsncmp.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wcsncmp.c,v 1.4 2005/08/08 08:05:37 espie Exp $	*/
+/*	$OpenBSD: wcsncmp.c,v 1.5 2015/09/12 16:23:14 guenther Exp $	*/
 /*	$NetBSD: wcsncmp.c,v 1.5 2003/08/07 16:43:54 agc Exp $	*/
 
 /*
@@ -50,3 +50,4 @@ wcsncmp(const wchar_t *s1, const wchar_t *s2, size_t n)
 	} while (--n != 0);
 	return (0);
 }
+DEF_STRONG(wcsncmp);
diff --git a/src/lib/libc/string/wcsncpy.c b/src/lib/libc/string/wcsncpy.c
index 107696f1..1be482b1 100644
--- a/src/lib/libc/string/wcsncpy.c
+++ b/src/lib/libc/string/wcsncpy.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wcsncpy.c,v 1.4 2006/04/17 18:05:35 espie Exp $	*/
+/*	$OpenBSD: wcsncpy.c,v 1.5 2015/09/12 16:23:14 guenther Exp $	*/
 /*	$NetBSD: wcsncpy.c,v 1.2 2001/01/03 14:29:37 lukem Exp $	*/
 
 /*-
@@ -48,3 +48,4 @@ wcsncpy(wchar_t *s1, const wchar_t *s2, size_t n)
 
 	return s1;
 }
+DEF_STRONG(wcsncpy);
diff --git a/src/lib/libc/string/wcspbrk.c b/src/lib/libc/string/wcspbrk.c
index 1923abfc..2178dc40 100644
--- a/src/lib/libc/string/wcspbrk.c
+++ b/src/lib/libc/string/wcspbrk.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wcspbrk.c,v 1.3 2005/08/08 08:05:37 espie Exp $	*/
+/*	$OpenBSD: wcspbrk.c,v 1.4 2015/09/12 16:23:14 guenther Exp $	*/
 /*	$NetBSD: wcspbrk.c,v 1.2 2001/01/03 14:29:37 lukem Exp $	*/
 
 /*-
@@ -51,3 +51,4 @@ wcspbrk(const wchar_t *s, const wchar_t *set)
 	}
 	return NULL;
 }
+DEF_STRONG(wcspbrk);
diff --git a/src/lib/libc/string/wcsrchr.c b/src/lib/libc/string/wcsrchr.c
index 3433310c..b69bdac1 100644
--- a/src/lib/libc/string/wcsrchr.c
+++ b/src/lib/libc/string/wcsrchr.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wcsrchr.c,v 1.3 2005/08/08 08:05:37 espie Exp $	*/
+/*	$OpenBSD: wcsrchr.c,v 1.4 2015/09/12 16:23:14 guenther Exp $	*/
 /*	$NetBSD: wcsrchr.c,v 1.2 2001/01/03 14:29:37 lukem Exp $	*/
 
 /*-
@@ -48,3 +48,4 @@ wcsrchr(const wchar_t *s, wchar_t c)
 	}
 	return NULL;
 }
+DEF_STRONG(wcsrchr);
diff --git a/src/lib/libc/string/wcsspn.c b/src/lib/libc/string/wcsspn.c
index 5162fa07..a3f28e3a 100644
--- a/src/lib/libc/string/wcsspn.c
+++ b/src/lib/libc/string/wcsspn.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wcsspn.c,v 1.3 2005/08/08 08:05:37 espie Exp $	*/
+/*	$OpenBSD: wcsspn.c,v 1.4 2015/09/12 16:23:14 guenther Exp $	*/
 /*	$NetBSD: wcsspn.c,v 1.3 2001/09/21 16:09:15 yamt Exp $	*/
 
 /*-
@@ -53,3 +53,4 @@ wcsspn(const wchar_t *s, const wchar_t *set)
 done:
 	return (p - s);
 }
+DEF_STRONG(wcsspn);
diff --git a/src/lib/libc/string/wcsstr.c b/src/lib/libc/string/wcsstr.c
index 669e3402..6a08b625 100644
--- a/src/lib/libc/string/wcsstr.c
+++ b/src/lib/libc/string/wcsstr.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wcsstr.c,v 1.3 2005/08/08 08:05:37 espie Exp $	*/
+/*	$OpenBSD: wcsstr.c,v 1.4 2015/09/12 16:23:14 guenther Exp $	*/
 /*	$NetBSD: wcsstr.c,v 1.3 2003/03/05 20:18:17 tshiozak Exp $	*/
 
 /*-
@@ -68,3 +68,6 @@ wcsstr(const wchar_t *big, const wchar_t *little)
 	}
 	return NULL;
 }
+#ifndef WCSWCS
+DEF_STRONG(wcsstr);
+#endif
diff --git a/src/lib/libc/string/wcswidth.c b/src/lib/libc/string/wcswidth.c
index 8ea1bdf6..9f003f96 100644
--- a/src/lib/libc/string/wcswidth.c
+++ b/src/lib/libc/string/wcswidth.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wcswidth.c,v 1.4 2011/04/04 18:16:24 stsp Exp $	*/
+/*	$OpenBSD: wcswidth.c,v 1.5 2015/09/12 16:23:14 guenther Exp $	*/
 /*	$NetBSD: wcswidth.c,v 1.2 2001/01/03 14:29:37 lukem Exp $	*/
 
 /*-
@@ -48,3 +48,4 @@ wcswidth(const wchar_t *s, size_t n)
 
 	return w;
 }
+DEF_WEAK(wcswidth);
diff --git a/src/lib/libc/string/wmemchr.c b/src/lib/libc/string/wmemchr.c
index 8c951786..55fb76a5 100644
--- a/src/lib/libc/string/wmemchr.c
+++ b/src/lib/libc/string/wmemchr.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wmemchr.c,v 1.3 2005/08/08 08:05:37 espie Exp $	*/
+/*	$OpenBSD: wmemchr.c,v 1.4 2015/09/12 16:23:14 guenther Exp $	*/
 /*	$NetBSD: wmemchr.c,v 1.2 2001/01/03 14:29:37 lukem Exp $	*/
 
 /*-
@@ -45,3 +45,4 @@ wmemchr(const wchar_t *s, wchar_t c, size_t n)
 	}
 	return NULL;
 }
+DEF_STRONG(wmemchr);
diff --git a/src/lib/libc/string/wmemcmp.c b/src/lib/libc/string/wmemcmp.c
index 39419aed..46617e29 100644
--- a/src/lib/libc/string/wmemcmp.c
+++ b/src/lib/libc/string/wmemcmp.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wmemcmp.c,v 1.4 2005/08/08 08:05:37 espie Exp $	*/
+/*	$OpenBSD: wmemcmp.c,v 1.5 2015/09/12 16:23:14 guenther Exp $	*/
 /*	$NetBSD: wmemcmp.c,v 1.3 2003/04/06 18:33:23 tshiozak Exp $	*/
 
 /*-
@@ -48,3 +48,4 @@ wmemcmp(const wchar_t *s1, const wchar_t *s2, size_t n)
 	}
 	return 0;
 }
+DEF_STRONG(wmemcmp);
diff --git a/src/lib/libc/string/wmemcpy.c b/src/lib/libc/string/wmemcpy.c
index 9bbd8364..cf02ab9d 100644
--- a/src/lib/libc/string/wmemcpy.c
+++ b/src/lib/libc/string/wmemcpy.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wmemcpy.c,v 1.3 2005/08/08 08:05:37 espie Exp $	*/
+/*	$OpenBSD: wmemcpy.c,v 1.4 2015/09/12 16:23:14 guenther Exp $	*/
 /*	$NetBSD: wmemcpy.c,v 1.2 2001/01/03 14:29:37 lukem Exp $	*/
 
 /*-
@@ -38,3 +38,4 @@ wmemcpy(wchar_t *d, const wchar_t *s, size_t n)
 
 	return (wchar_t *)memcpy(d, s, n * sizeof(wchar_t));
 }
+DEF_STRONG(wmemcpy);
diff --git a/src/lib/libc/string/wmemmove.c b/src/lib/libc/string/wmemmove.c
index 21bbabcd..8bf80110 100644
--- a/src/lib/libc/string/wmemmove.c
+++ b/src/lib/libc/string/wmemmove.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wmemmove.c,v 1.3 2005/08/08 08:05:37 espie Exp $	*/
+/*	$OpenBSD: wmemmove.c,v 1.4 2015/09/12 16:23:14 guenther Exp $	*/
 /*	$NetBSD: wmemmove.c,v 1.2 2001/01/03 14:29:37 lukem Exp $	*/
 
 /*-
@@ -38,3 +38,4 @@ wmemmove(wchar_t *d, const wchar_t *s, size_t n)
 
 	return (wchar_t *)memmove(d, s, n * sizeof(wchar_t));
 }
+DEF_STRONG(wmemmove);
diff --git a/src/lib/libc/string/wmemset.c b/src/lib/libc/string/wmemset.c
index ac476dba..a2d32951 100644
--- a/src/lib/libc/string/wmemset.c
+++ b/src/lib/libc/string/wmemset.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wmemset.c,v 1.3 2005/08/08 08:05:37 espie Exp $	*/
+/*	$OpenBSD: wmemset.c,v 1.4 2015/09/12 16:23:14 guenther Exp $	*/
 /*	$NetBSD: wmemset.c,v 1.2 2001/01/03 14:29:37 lukem Exp $	*/
 
 /*-
@@ -44,3 +44,4 @@ wmemset(wchar_t *s, wchar_t c, size_t n)
 	}
 	return s;
 }
+DEF_STRONG(wmemset);