diff --git a/libc/Android.mk b/libc/Android.mk
index 916b63c..893738a 100644
--- a/libc/Android.mk
+++ b/libc/Android.mk
@@ -206,16 +206,10 @@
     bionic/socket.cpp \
     bionic/stat.cpp \
     bionic/statvfs.cpp \
-    bionic/strcoll_l.cpp \
     bionic/strerror.cpp \
     bionic/strerror_r.cpp \
-    bionic/strftime_l.cpp \
     bionic/strsignal.cpp \
     bionic/strtold.cpp \
-    bionic/strtold_l.cpp \
-    bionic/strtoll_l.cpp \
-    bionic/strtoull_l.cpp \
-    bionic/strxfrm_l.cpp \
     bionic/stubs.cpp \
     bionic/symlink.cpp \
     bionic/sysconf.cpp \
diff --git a/libc/bionic/locale.cpp b/libc/bionic/locale.cpp
index b4a3472..681e038 100644
--- a/libc/bionic/locale.cpp
+++ b/libc/bionic/locale.cpp
@@ -29,6 +29,10 @@
 #include <locale.h>
 #include <pthread.h>
 #include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include <time.h>
+#include <wchar.h>
 
 #include "private/bionic_macros.h"
 
@@ -171,3 +175,47 @@
 
   return old_locale;
 }
+
+int strcasecmp_l(const char* s1, const char* s2, locale_t) {
+  return strcasecmp(s1, s2);
+}
+
+int strcoll_l(const char* s1, const char* s2, locale_t) {
+  return strcoll(s1, s2);
+}
+
+char* strerror_l(int error, locale_t) {
+  return strerror(error);
+}
+
+size_t strftime_l(char* s, size_t max, const char* format, const struct tm* tm, locale_t) {
+  return strftime(s, max, format, tm);
+}
+
+int strncasecmp_l(const char* s1, const char* s2, size_t n, locale_t) {
+  return strncasecmp(s1, s2, n);
+}
+
+long double strtold_l(const char* s, char** end_ptr, locale_t) {
+  return strtold(s, end_ptr);
+}
+
+long long strtoll_l(const char* s, char** end_ptr, int base, locale_t) {
+  return strtoll(s, end_ptr, base);
+}
+
+unsigned long long strtoull_l(const char* s, char** end_ptr, int base, locale_t) {
+  return strtoull(s, end_ptr, base);
+}
+
+size_t strxfrm_l(char* dst, const char* src, size_t n, locale_t) {
+  return strxfrm(dst, src, n);
+}
+
+int wcscasecmp_l(const wchar_t* ws1, const wchar_t* ws2, locale_t) {
+  return wcscasecmp(ws1, ws2);
+}
+
+int wcsncasecmp_l(const wchar_t* ws1, const wchar_t* ws2, size_t n, locale_t) {
+  return wcsncasecmp(ws1, ws2, n);
+}
diff --git a/libc/bionic/strcoll_l.cpp b/libc/bionic/strcoll_l.cpp
deleted file mode 100644
index 7d7c28b..0000000
--- a/libc/bionic/strcoll_l.cpp
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *  * Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *  * 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
- * COPYRIGHT OWNER 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.
- */
-
-#include <string.h>
-
-int strcoll_l(const char *s1, const char *s2, locale_t) {
-  return strcoll(s1, s2);
-}
diff --git a/libc/bionic/strftime_l.cpp b/libc/bionic/strftime_l.cpp
deleted file mode 100644
index fb01da5..0000000
--- a/libc/bionic/strftime_l.cpp
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *  * Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *  * 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
- * COPYRIGHT OWNER 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.
- */
-
-#include <time.h>
-
-size_t strftime_l(char *s, size_t max, const char *format, const struct tm *tm,
-                  locale_t) {
-  return strftime(s, max, format, tm);
-}
diff --git a/libc/bionic/strtold_l.cpp b/libc/bionic/strtold_l.cpp
deleted file mode 100644
index 4b230b9..0000000
--- a/libc/bionic/strtold_l.cpp
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *  * Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *  * 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
- * COPYRIGHT OWNER 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.
- */
-
-#include <stdlib.h>
-
-long double strtold_l(const char *nptr, char **endptr, locale_t) {
-  return strtold(nptr, endptr);
-}
diff --git a/libc/bionic/strtoll_l.cpp b/libc/bionic/strtoll_l.cpp
deleted file mode 100644
index 47b126e..0000000
--- a/libc/bionic/strtoll_l.cpp
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *  * Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *  * 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
- * COPYRIGHT OWNER 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.
- */
-
-#include <stdlib.h>
-
-long long strtoll_l(const char *nptr, char **endptr, int base, locale_t) {
-  return strtoll(nptr, endptr, base);
-}
diff --git a/libc/bionic/strtoull_l.cpp b/libc/bionic/strtoull_l.cpp
deleted file mode 100644
index 398ba0e..0000000
--- a/libc/bionic/strtoull_l.cpp
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *  * Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *  * 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
- * COPYRIGHT OWNER 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.
- */
-
-#include <stdlib.h>
-
-unsigned long long strtoull_l(const char *nptr, char **endptr, int base,
-                              locale_t) {
-  return strtoull(nptr, endptr, base);
-}
diff --git a/libc/bionic/strxfrm_l.cpp b/libc/bionic/strxfrm_l.cpp
deleted file mode 100644
index afe3b96..0000000
--- a/libc/bionic/strxfrm_l.cpp
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *  * Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *  * 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
- * COPYRIGHT OWNER 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.
- */
-
-#include <string.h>
-
-size_t strxfrm_l(char *dest, const char *src, size_t n, locale_t) {
-  return strxfrm(dest, src, n);
-}
diff --git a/libc/include/string.h b/libc/include/string.h
index 611c31a..f0bed10 100644
--- a/libc/include/string.h
+++ b/libc/include/string.h
@@ -58,8 +58,11 @@
 extern char*  strcpy(char* __restrict, const char* __restrict);
 extern char*  strcat(char* __restrict, const char* __restrict);
 
-extern int    strcasecmp(const char *, const char *) __purefunc;
-extern int    strncasecmp(const char *, const char *, size_t) __purefunc;
+int strcasecmp(const char*, const char*) __purefunc;
+int strcasecmp_l(const char*, const char*, locale_t) __purefunc;
+int strncasecmp(const char*, const char*, size_t) __purefunc;
+int strncasecmp_l(const char*, const char*, size_t, locale_t) __purefunc;
+
 extern char*  strdup(const char *);
 
 extern char*  strstr(const char *, const char *) __purefunc;
@@ -68,6 +71,7 @@
 extern char*  strtok_r(char* __restrict, const char* __restrict, char** __restrict);
 
 extern char* strerror(int);
+extern char* strerror_l(int, locale_t);
 #if defined(__USE_GNU)
 extern char* strerror_r(int, char*, size_t) __RENAME(__gnu_strerror_r);
 #else /* POSIX */
diff --git a/libc/include/strings.h b/libc/include/strings.h
index ae261cf..1253006 100644
--- a/libc/include/strings.h
+++ b/libc/include/strings.h
@@ -41,22 +41,23 @@
 
 #include <sys/types.h>
 #include <sys/cdefs.h>
+#include <xlocale.h>
 
 __BEGIN_DECLS
 #if defined(__BIONIC_FORTIFY)
-#define bcopy(b1, b2, len) \
-  (void)(__builtin___memmove_chk((b2), (b1), (len), __bos0(b2)))
-#define bzero(b, len) \
-  (void)(__builtin___memset_chk((b), '\0', (len), __bos0(b)))
+#define bcopy(b1, b2, len) (void)(__builtin___memmove_chk((b2), (b1), (len), __bos0(b2)))
+#define bzero(b, len) (void)(__builtin___memset_chk((b), '\0', (len), __bos0(b)))
 #else
 #define bcopy(b1, b2, len) (void)(__builtin_memmove((b2), (b1), (len)))
 #define bzero(b, len) (void)(__builtin_memset((b), '\0', (len)))
 #endif
 
+int ffs(int);
 
-int	 ffs(int);
-int	 strcasecmp(const char *, const char *);
-int	 strncasecmp(const char *, const char *, size_t);
+int strcasecmp(const char*, const char*) __purefunc;
+int strcasecmp_l(const char*, const char*, locale_t) __purefunc;
+int strncasecmp(const char*, const char*, size_t) __purefunc;
+int strncasecmp_l(const char*, const char*, size_t, locale_t) __purefunc;
 
 __END_DECLS
 
diff --git a/libc/include/wchar.h b/libc/include/wchar.h
index 10a78b8..9e279d3 100644
--- a/libc/include/wchar.h
+++ b/libc/include/wchar.h
@@ -34,6 +34,7 @@
 #include <stdarg.h>
 #include <stddef.h>
 #include <time.h>
+#include <xlocale.h>
 
 #include <machine/wchar_limits.h>
 
@@ -112,6 +113,7 @@
 extern int vwscanf(const wchar_t*, va_list);
 extern size_t            wcrtomb(char *, wchar_t, mbstate_t *);
 extern int               wcscasecmp(const wchar_t *, const wchar_t *);
+extern int               wcscasecmp_l(const wchar_t *, const wchar_t *, locale_t);
 extern wchar_t          *wcscat(wchar_t *, const wchar_t *);
 extern wchar_t          *wcschr(const wchar_t *, wchar_t);
 extern int               wcscmp(const wchar_t *, const wchar_t *);
@@ -121,6 +123,7 @@
 extern size_t            wcsftime(wchar_t *, size_t, const wchar_t *, const struct tm *) __LIBC_ABI_PUBLIC__;
 extern size_t            wcslen(const wchar_t *);
 extern int               wcsncasecmp(const wchar_t *, const wchar_t *, size_t);
+extern int               wcsncasecmp_l(const wchar_t *, const wchar_t *, size_t, locale_t);
 extern wchar_t          *wcsncat(wchar_t *, const wchar_t *, size_t);
 extern int               wcsncmp(const wchar_t *, const wchar_t *, size_t);
 extern wchar_t          *wcsncpy(wchar_t *, const wchar_t *, size_t);