commit 3be4400034a2bb9c28300b088ecb6271eaa44a2b
Author: Brian Inglis <Brian.Inglis@SystematicSW.ab.ca>
Date:   Wed Aug 24 13:46:25 2016 -0600

    add string.h(strerror_l) as POSIX, change string.h(str[n]casecmp_l) from POSIX
    to GNU, change strings.h(str[n]casecmp_l) from GNU to POSIX, use _EXFUN

diff --git a/newlib/libc/include/string.h b/newlib/libc/include/string.h
index 8f4fd2e..96703b5 100644
--- a/newlib/libc/include/string.h
+++ b/newlib/libc/include/string.h
@@ -48,13 +48,14 @@ char 	*_EXFUN(strtok,(char *__restrict, const char *__restrict));
 size_t	 _EXFUN(strxfrm,(char *__restrict, const char *__restrict, size_t));
 
 #if __POSIX_VISIBLE >= 200809
-extern int strcasecmp_l (const char *, const char *, locale_t);
-extern int strncasecmp_l (const char *, const char *, size_t, locale_t);
-extern int strcoll_l (const char *, const char *, locale_t);
-extern size_t strxfrm_l (char *__restrict, const char *__restrict, size_t,
-			 locale_t);
+int	 _EXFUN(strcoll_l,(const char *, const char *, locale_t);
+char	*_EXFUN(strerror_l,(int, locale_t);
+size_t	 _EXFUN(strxfrm_l,(char *__restrict, const char *__restrict, size_t, locale_t));
+#endif
+#if __GNU_VISIBLE
+int	 _EXFUN(strcasecmp_l,(const char *, const char *, locale_t));
+int	 _EXFUN(strncasecmp_l,(const char *, const char *, size_t, locale_t));
 #endif
-
 #if __MISC_VISIBLE || __POSIX_VISIBLE
 char 	*_EXFUN(strtok_r,(char *__restrict, const char *__restrict, char **__restrict));
 #endif
diff --git a/newlib/libc/include/strings.h b/newlib/libc/include/strings.h
index b462d07..60e995b 100644
--- a/newlib/libc/include/strings.h
+++ b/newlib/libc/include/strings.h
@@ -33,10 +33,10 @@ int	 _EXFUN(ffs,(int));
 int	 _EXFUN(strcasecmp,(const char *, const char *));
 int	 _EXFUN(strncasecmp,(const char *, const char *, size_t));
 
-#if __GNU_VISIBLE
-extern int strcasecmp_l (const char *, const char *, locale_t);
-extern int strncasecmp_l (const char *, const char *, size_t, locale_t);
-#endif /* _GNU_VISIBLE */
+#if __POSIX_VISIBLE >= 200809
+int	 _EXFUN(strcasecmp_l,(const char *, const char *, locale_t);
+int	 _EXFUN(strncasecmp_l,(const char *, const char *, size_t, locale_t);
+#endif /* __POSIX_VISIBLE >= 200809 */
 
 _END_STD_C