diff --git a/lib/c.zig b/lib/c.zig
index 40b7008740..15f60b7c78 100644
--- a/lib/c.zig
+++ b/lib/c.zig
@@ -18,6 +18,7 @@ comptime {
     _ = @import("c/ctype.zig");
     _ = @import("c/stdlib.zig");
     _ = @import("c/math.zig");
+    _ = @import("c/wchar.zig");
 
     if (builtin.target.isMuslLibC() or builtin.target.isWasiLibC()) {
         // Files specific to musl and wasi-libc.
diff --git a/lib/c/wchar.zig b/lib/c/wchar.zig
new file mode 100644
index 0000000000..a1e253ac17
--- /dev/null
+++ b/lib/c/wchar.zig
@@ -0,0 +1,184 @@
+const std = @import("std");
+const common = @import("common.zig");
+const builtin = @import("builtin");
+const wint_t = std.c.wint_t;
+const wchar_t = std.c.wchar_t;
+
+comptime {
+    if (builtin.target.isMuslLibC() or builtin.target.isWasiLibC()) {
+        @export(&wmemchr, .{ .name = "wmemchr", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wmemcmp, .{ .name = "wmemcmp", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wmemcpy, .{ .name = "wmemcpy", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wmemmove, .{ .name = "wmemmove", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wmemset, .{ .name = "wmemset", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wcslen, .{ .name = "wcslen", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wcsnlen, .{ .name = "wcsnlen", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wcscmp, .{ .name = "wcscmp", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wcsncmp, .{ .name = "wcsncmp", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wcpcpy, .{ .name = "wcpcpy", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wcpncpy, .{ .name = "wcpncpy", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wcscpy, .{ .name = "wcscpy", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wcsncpy, .{ .name = "wcsncpy", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wcscat, .{ .name = "wcscat", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wcsncat, .{ .name = "wcsncat", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wcschr, .{ .name = "wcschr", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wcsrchr, .{ .name = "wcsrchr", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wcsspn, .{ .name = "wcsspn", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wcscspn, .{ .name = "wcscspn", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wcspbrk, .{ .name = "wcspbrk", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wcsstr, .{ .name = "wcsstr", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wcswcs, .{ .name = "wcswcs", .linkage = common.linkage, .visibility = common.visibility });
+    }
+
+    if (builtin.target.isMinGW()) {
+        @export(&wmemchr, .{ .name = "wmemchr", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wmemcmp, .{ .name = "wmemcmp", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wmemcpy, .{ .name = "wmemcpy", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wmempcpy, .{ .name = "wmempcpy", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wmemmove, .{ .name = "wmemmove", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wmemset, .{ .name = "wmemset", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&wcsnlen, .{ .name = "wcsnlen", .linkage = common.linkage, .visibility = common.visibility });
+    }
+}
+
+fn wmemchr(ptr: [*]const wchar_t, value: wchar_t, len: usize) callconv(.c) ?[*]wchar_t {
+    return @constCast(ptr[std.mem.findScalar(wchar_t, ptr[0..len], value) orelse return null ..]);
+}
+
+fn wmemcmp(a: [*]const wchar_t, b: [*]const wchar_t, len: usize) callconv(.c) c_int {
+    const idx = std.mem.findDiff(wchar_t, a[0..len], b[0..len]) orelse return 0;
+
+    return switch (std.math.order(a[idx], b[idx])) {
+        .eq => unreachable,
+        .gt => 1,
+        .lt => -1,
+    };
+}
+
+fn wmemcpy(noalias dest: [*]wchar_t, noalias src: [*]const wchar_t, len: usize) callconv(.c) [*]wchar_t {
+    @memcpy(dest[0..len], src[0..len]);
+    return dest;
+}
+
+fn wmempcpy(noalias dest: [*]wchar_t, noalias src: [*]const wchar_t, len: usize) callconv(.c) [*]wchar_t {
+    @memcpy(dest[0..len], src[0..len]);
+    return dest + len;
+}
+
+fn wmemmove(dest: [*]wchar_t, src: [*]const wchar_t, len: usize) callconv(.c) [*]wchar_t {
+    @memmove(dest[0..len], src[0..len]);
+    return dest;
+}
+
+fn wmemset(dest: [*]wchar_t, elem: wchar_t, len: usize) callconv(.c) [*]wchar_t {
+    @memset(dest[0..len], elem);
+    return dest;
+}
+
+fn wcslen(str: [*:0]const wchar_t) callconv(.c) usize {
+    return wcsnlen(str, std.math.maxInt(usize));
+}
+
+fn wcsnlen(str: [*:0]const wchar_t, max: usize) callconv(.c) usize {
+    return std.mem.findScalar(wchar_t, str[0..max], 0) orelse max;
+}
+
+fn wcscmp(a: [*:0]const wchar_t, b: [*:0]const wchar_t) callconv(.c) c_int {
+    return wcsncmp(a, b, std.math.maxInt(usize));
+}
+
+fn wcsncmp(a: [*:0]const wchar_t, b: [*:0]const wchar_t, max: usize) callconv(.c) c_int {
+    const a_slice = a[0..wcsnlen(a, max)];
+    const b_slice = b[0..wcsnlen(b, max)];
+
+    return switch (std.math.order(a_slice.len, b_slice.len)) {
+        .eq => blk: {
+            const idx = std.mem.findDiff(wchar_t, a_slice, b_slice) orelse break :blk 0;
+
+            break :blk switch (std.math.order(a[idx], b[idx])) {
+                .eq => unreachable,
+                .gt => 1,
+                .lt => -1,
+            };
+        },
+        .gt => 1,
+        .lt => -1,
+    };
+}
+
+fn wcpcpy(noalias dst: [*]wchar_t, noalias src: [*:0]const wchar_t) callconv(.c) [*]wchar_t {
+    const src_slice = std.mem.span(src);
+    @memcpy(dst[0..src_slice.len], src_slice);
+    dst[src_slice.len] = 0;
+    return dst + src_slice.len;
+    // XXX: LLVM bug?
+    // return wcpncpy(dst, src, std.math.maxInt(usize));
+}
+
+fn wcpncpy(noalias dst: [*]wchar_t, noalias src: [*:0]const wchar_t, max: usize) callconv(.c) [*]wchar_t {
+    const src_len = wcsnlen(src, max);
+    const copying_len = @min(max, src_len);
+
+    @memcpy(dst[0..copying_len], src[0..copying_len]);
+
+    if (copying_len < max) dst[copying_len] = 0;
+    return dst + copying_len;
+}
+
+fn wcscpy(noalias dst: [*]wchar_t, noalias src: [*:0]const wchar_t) callconv(.c) [*]wchar_t {
+    _ = wcpcpy(dst, src);
+    return dst;
+}
+
+fn wcsncpy(noalias dst: [*]wchar_t, noalias src: [*:0]const wchar_t, max: usize) callconv(.c) [*]wchar_t {
+    _ = wcpncpy(dst, src, max);
+    return dst;
+}
+
+fn wcscat(noalias dst: [*:0]wchar_t, noalias src: [*:0]const wchar_t) callconv(.c) [*:0]wchar_t {
+    return wcsncat(dst, src, std.math.maxInt(usize));
+}
+
+fn wcsncat(noalias dst: [*:0]wchar_t, noalias src: [*:0]const wchar_t, max: usize) callconv(.c) [*:0]wchar_t {
+    const dst_len = std.mem.len(dst);
+    const src_len = std.mem.len(src);
+    const copying_len = @min(max, src_len);
+
+    @memcpy(dst[dst_len..][0..copying_len], src[0..copying_len]);
+    dst[dst_len + copying_len] = 0;
+    return dst[0..(dst_len + copying_len) :0].ptr;
+}
+
+fn wcschr(str: [*:0]const wchar_t, value: wchar_t) callconv(.c) ?[*:0]wchar_t {
+    const len = std.mem.len(str);
+
+    if (value == 0) return @constCast(str + len);
+    return @constCast(str[std.mem.findScalar(wchar_t, str[0..len], value) orelse return null ..]);
+}
+
+fn wcsrchr(str: [*:0]const wchar_t, value: wchar_t) callconv(.c) ?[*:0]wchar_t {
+    // std.mem.len(str) + 1 to not special case '\0'
+    return @constCast(str[std.mem.findScalarLast(wchar_t, str[0..(std.mem.len(str) + 1)], value) orelse return null ..]);
+}
+
+fn wcsspn(dst: [*:0]const wchar_t, values: [*:0]const wchar_t) callconv(.c) usize {
+    const dst_slice = std.mem.span(dst);
+    return std.mem.findNone(wchar_t, dst_slice, std.mem.span(values)) orelse dst_slice.len;
+}
+
+fn wcscspn(dst: [*:0]const wchar_t, values: [*:0]const wchar_t) callconv(.c) usize {
+    const dst_slice = std.mem.span(dst);
+    return std.mem.findAny(wchar_t, dst_slice, std.mem.span(values)) orelse dst_slice.len;
+}
+
+fn wcspbrk(haystack: [*:0]const wchar_t, needle: [*:0]const wchar_t) callconv(.c) ?[*:0]wchar_t {
+    return @constCast(haystack[std.mem.findAny(wchar_t, std.mem.span(haystack), std.mem.span(needle)) orelse return null ..]);
+}
+
+fn wcsstr(noalias haystack: [*:0]const wchar_t, noalias needle: [*:0]const wchar_t) callconv(.c) ?[*:0]wchar_t {
+    return @constCast(haystack[std.mem.find(wchar_t, std.mem.span(haystack), std.mem.span(needle)) orelse return null ..]);
+}
+
+fn wcswcs(noalias haystack: [*:0]const wchar_t, noalias needle: [*:0]const wchar_t) callconv(.c) ?[*:0]wchar_t {
+    return wcsstr(haystack, needle);
+}
diff --git a/lib/libc/mingw/misc/wcsnlen.c b/lib/libc/mingw/misc/wcsnlen.c
deleted file mode 100644
index b7dca79d5a..0000000000
--- a/lib/libc/mingw/misc/wcsnlen.c
+++ /dev/null
@@ -1,13 +0,0 @@
-#define __CRT__NO_INLINE
-#include <string.h>
-
-size_t __cdecl
-wcsnlen(const wchar_t *w, size_t ncnt)
-{
-  size_t n = 0;
-
-  for (; n < ncnt && *w != 0; n++, w++)
-    ;
-
-  return n;
-}
diff --git a/lib/libc/mingw/misc/wmemchr.c b/lib/libc/mingw/misc/wmemchr.c
deleted file mode 100644
index fb037f7f51..0000000000
--- a/lib/libc/mingw/misc/wmemchr.c
+++ /dev/null
@@ -1,35 +0,0 @@
-/**
- * This file has no copyright assigned and is placed in the Public Domain.
- * This file is part of the mingw-w64 runtime package.
- * No warranty is given; refer to the file DISCLAIMER.PD within this package.
- */
-
-#define __CRT__NO_INLINE
-#include	<wchar.h>
-
-#if 0
-wchar_t *wmemchr(s, c, n)
-	register const wchar_t	*s;
-	register wchar_t		c;
-	register size_t			n;
-{
-	if ( s != NULL )
-		for ( ; n > 0; ++s, --n )
-			if ( *s == c )
-				return (wchar_t *)s;
-
-	return NULL;
-}
-#endif
-
-_CONST_RETURN wchar_t *__cdecl wmemchr(const wchar_t *_S,wchar_t _C,size_t _N)
-{
-	if (_S != NULL)
-	{
-		for ( ; 0 < _N; ++_S, --_N)
-			if (*_S == _C)
-				return (_CONST_RETURN wchar_t *)(_S);
-	}
-	return NULL;
-}
-
diff --git a/lib/libc/mingw/misc/wmemcmp.c b/lib/libc/mingw/misc/wmemcmp.c
deleted file mode 100644
index 5917b5a62a..0000000000
--- a/lib/libc/mingw/misc/wmemcmp.c
+++ /dev/null
@@ -1,56 +0,0 @@
-/**
- * This file has no copyright assigned and is placed in the Public Domain.
- * This file is part of the mingw-w64 runtime package.
- * No warranty is given; refer to the file DISCLAIMER.PD within this package.
- */
-/*	This source code was extracted from the Q8 package created and placed
-    in the PUBLIC DOMAIN by Doug Gwyn <gwyn@arl.mil>
-    last edit:	1999/11/05	gwyn@arl.mil
-
-    Implements subclause 7.24 of ISO/IEC 9899:1999 (E).
-
-	It supports an encoding where all char codes are mapped
-	to the *same* code values within a wchar_t or wint_t,
-	so long as no other wchar_t codes are used by the program.
-
-*/
-
-#define __CRT__NO_INLINE
-#include	<wchar.h>
-
-#if 0
-int
-wmemcmp(s1, s2, n)
-	register const wchar_t	*s1;
-	register const wchar_t	*s2;
-	size_t				n;
-{
-	if ( n == 0 || s1 == s2 )
-		return 0;		/* even for NULL pointers */
-
-	if ( (s1 != NULL) != (s2 != NULL) )
-		return s2 == NULL ? 1 : -1;	/* robust */
-
-	for ( ; n > 0; ++s1, ++s2, --n )
-		if ( *s1 != *s2 )
-			return *s1 - *s2;
-
-	return 0;
-}
-#endif
-
-int __cdecl wmemcmp(const wchar_t *_S1,const wchar_t *_S2,size_t _N)
-{
-	if (_N == 0 || _S1 == _S2)
-		return 0;	/* even for NULL pointers */
-
-	if ((_S1 != NULL) != (_S2 != NULL))
-		return _S2 == NULL ? 1 : -1;	/* robust */
-
-	for ( ; 0 < _N; ++_S1, ++_S2, --_N)
-		if (*_S1 != *_S2)
-			return (*_S1 < *_S2 ? -1 : +1);
-
-	return 0;
-}
-
diff --git a/lib/libc/mingw/misc/wmemcpy.c b/lib/libc/mingw/misc/wmemcpy.c
deleted file mode 100644
index a84091322b..0000000000
--- a/lib/libc/mingw/misc/wmemcpy.c
+++ /dev/null
@@ -1,33 +0,0 @@
-/**
- * This file has no copyright assigned and is placed in the Public Domain.
- * This file is part of the mingw-w64 runtime package.
- * No warranty is given; refer to the file DISCLAIMER.PD within this package.
- */
-
-#define __CRT__NO_INLINE
-#include	<wchar.h>
-
-#if 0
-wchar_t *
-wmemcpy(s1, s2, n)
-	register wchar_t * __restrict__		s1;
-	register const wchar_t * __restrict__	s2;
-	register size_t					n;
-{
-	wchar_t						*orig_s1 = s1;
-
-	if ( s1 == NULL || s2 == NULL || n == 0 )
-		return orig_s1;		/* robust */
-
-	for ( ; n > 0; --n )
-		*s1++ = *s2++;
-
-	return orig_s1;
-}
-#endif
-
-wchar_t *__cdecl wmemcpy(wchar_t *_S1,const wchar_t *_S2,size_t _N)
-{
-	return (wchar_t *)memcpy(_S1,_S2,_N*sizeof(wchar_t));
-}
-
diff --git a/lib/libc/mingw/misc/wmemmove.c b/lib/libc/mingw/misc/wmemmove.c
deleted file mode 100644
index 1b9e42c123..0000000000
--- a/lib/libc/mingw/misc/wmemmove.c
+++ /dev/null
@@ -1,45 +0,0 @@
-/**
- * This file has no copyright assigned and is placed in the Public Domain.
- * This file is part of the mingw-w64 runtime package.
- * No warranty is given; refer to the file DISCLAIMER.PD within this package.
- */
-
-#define __CRT__NO_INLINE
-#include	<errno.h>
-#include	<stdio.h>
-#include	<stdlib.h>
-#include	<wchar.h>
-
-#if 0
-wchar_t *
-wmemmove(s1, s2, n)
-	register wchar_t		*s1;
-	register const wchar_t	*s2;
-	register size_t			n;
-{
-	wchar_t				*orig_s1 = s1;
-
-	if ( s1 == NULL || s2 == NULL || n == 0 )
-		return orig_s1;		/* robust */
-
-	/* XXX -- The following test works only within a flat address space! */
-	if ( s2 >= s1 )
-		for ( ; n > 0; --n )
-			*s1++ = *s2++;
-	else	{
-		s1 += n;
-		s2 += n;
-
-		for ( ; n > 0; --n )
-			*--s1 = *--s2;
-		}
-
-	return orig_s1;
-}
-#endif
-
-wchar_t *__cdecl wmemmove(wchar_t *_S1,const wchar_t *_S2,size_t _N)
-{
-	return (wchar_t *)memmove(_S1,_S2,_N*sizeof(wchar_t));
-}
-
diff --git a/lib/libc/mingw/misc/wmempcpy.c b/lib/libc/mingw/misc/wmempcpy.c
deleted file mode 100644
index 0ad3e50034..0000000000
--- a/lib/libc/mingw/misc/wmempcpy.c
+++ /dev/null
@@ -1,12 +0,0 @@
-#define __CRT__NO_INLINE
-#include <wchar.h>
-
-wchar_t * __cdecl
-wmempcpy (wchar_t *d, const wchar_t *s, size_t len)
-{
-  wchar_t *r = d + len;
-  if (len != 0)
-    memcpy (d, s, len * sizeof (wchar_t));
-  return r;
-}
-
diff --git a/lib/libc/mingw/misc/wmemset.c b/lib/libc/mingw/misc/wmemset.c
deleted file mode 100644
index 26917b03be..0000000000
--- a/lib/libc/mingw/misc/wmemset.c
+++ /dev/null
@@ -1,34 +0,0 @@
-/**
- * This file has no copyright assigned and is placed in the Public Domain.
- * This file is part of the mingw-w64 runtime package.
- * No warranty is given; refer to the file DISCLAIMER.PD within this package.
- */
-
-#define __CRT__NO_INLINE
-#include	<wchar.h>
-
-#if 0
-wchar_t *
-wmemset(s, c, n)
-	register wchar_t	*s;
-	register wchar_t	c;
-	register size_t		n;
-{
-	wchar_t			*orig_s = s;
-
-	if ( s != NULL )
-		for ( ; n > 0; --n )
-			*s++ = c;
-
-	return orig_s;
-}
-#endif
-
-wchar_t *__cdecl wmemset(wchar_t *_S,wchar_t _C,size_t _N)
-{
-	wchar_t *_Su = _S;
-	for ( ; 0 < _N; ++_Su, --_N)
-		 *_Su = _C;
-	return (_S);
-}
-
diff --git a/lib/libc/musl/src/string/wcpcpy.c b/lib/libc/musl/src/string/wcpcpy.c
deleted file mode 100644
index ef40134332..0000000000
--- a/lib/libc/musl/src/string/wcpcpy.c
+++ /dev/null
@@ -1,6 +0,0 @@
-#include <wchar.h>
-
-wchar_t *wcpcpy(wchar_t *restrict d, const wchar_t *restrict s)
-{
-	return wcscpy(d, s) + wcslen(s);
-}
diff --git a/lib/libc/musl/src/string/wcpncpy.c b/lib/libc/musl/src/string/wcpncpy.c
deleted file mode 100644
index b667f6d6a8..0000000000
--- a/lib/libc/musl/src/string/wcpncpy.c
+++ /dev/null
@@ -1,6 +0,0 @@
-#include <wchar.h>
-
-wchar_t *wcpncpy(wchar_t *restrict d, const wchar_t *restrict s, size_t n)
-{
-	return wcsncpy(d, s, n) + wcsnlen(s, n);
-}
diff --git a/lib/libc/musl/src/string/wcscat.c b/lib/libc/musl/src/string/wcscat.c
deleted file mode 100644
index d4f00ebdfe..0000000000
--- a/lib/libc/musl/src/string/wcscat.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <wchar.h>
-
-wchar_t *wcscat(wchar_t *restrict dest, const wchar_t *restrict src)
-{
-	wcscpy(dest + wcslen(dest), src);
-	return dest;
-}
diff --git a/lib/libc/musl/src/string/wcschr.c b/lib/libc/musl/src/string/wcschr.c
deleted file mode 100644
index 8dfc2f3183..0000000000
--- a/lib/libc/musl/src/string/wcschr.c
+++ /dev/null
@@ -1,8 +0,0 @@
-#include <wchar.h>
-
-wchar_t *wcschr(const wchar_t *s, wchar_t c)
-{
-	if (!c) return (wchar_t *)s + wcslen(s);
-	for (; *s && *s != c; s++);
-	return *s ? (wchar_t *)s : 0;
-}
diff --git a/lib/libc/musl/src/string/wcscmp.c b/lib/libc/musl/src/string/wcscmp.c
deleted file mode 100644
index 286ec3ea40..0000000000
--- a/lib/libc/musl/src/string/wcscmp.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <wchar.h>
-
-int wcscmp(const wchar_t *l, const wchar_t *r)
-{
-	for (; *l==*r && *l && *r; l++, r++);
-	return *l < *r ? -1 : *l > *r;
-}
diff --git a/lib/libc/musl/src/string/wcscpy.c b/lib/libc/musl/src/string/wcscpy.c
deleted file mode 100644
index 625bf53d08..0000000000
--- a/lib/libc/musl/src/string/wcscpy.c
+++ /dev/null
@@ -1,8 +0,0 @@
-#include <wchar.h>
-
-wchar_t *wcscpy(wchar_t *restrict d, const wchar_t *restrict s)
-{
-	wchar_t *a = d;
-	while ((*d++ = *s++));
-	return a;
-}
diff --git a/lib/libc/musl/src/string/wcscspn.c b/lib/libc/musl/src/string/wcscspn.c
deleted file mode 100644
index c4e52722e1..0000000000
--- a/lib/libc/musl/src/string/wcscspn.c
+++ /dev/null
@@ -1,10 +0,0 @@
-#include <wchar.h>
-
-size_t wcscspn(const wchar_t *s, const wchar_t *c)
-{
-	const wchar_t *a;
-	if (!c[0]) return wcslen(s);
-	if (!c[1]) return (s=wcschr(a=s, *c)) ? s-a : wcslen(a);
-	for (a=s; *s && !wcschr(c, *s); s++);
-	return s-a;
-}
diff --git a/lib/libc/musl/src/string/wcslen.c b/lib/libc/musl/src/string/wcslen.c
deleted file mode 100644
index 1b7b66550c..0000000000
--- a/lib/libc/musl/src/string/wcslen.c
+++ /dev/null
@@ -1,8 +0,0 @@
-#include <wchar.h>
-
-size_t wcslen(const wchar_t *s)
-{
-	const wchar_t *a;
-	for (a=s; *s; s++);
-	return s-a;
-}
diff --git a/lib/libc/musl/src/string/wcsncat.c b/lib/libc/musl/src/string/wcsncat.c
deleted file mode 100644
index 8563f1a2a7..0000000000
--- a/lib/libc/musl/src/string/wcsncat.c
+++ /dev/null
@@ -1,10 +0,0 @@
-#include <wchar.h>
-
-wchar_t *wcsncat(wchar_t *restrict d, const wchar_t *restrict s, size_t n)
-{
-	wchar_t *a = d;
-	d += wcslen(d);
-	while (n && *s) n--, *d++ = *s++;
-	*d++ = 0;
-	return a;
-}
diff --git a/lib/libc/musl/src/string/wcsncmp.c b/lib/libc/musl/src/string/wcsncmp.c
deleted file mode 100644
index 2b3558bf72..0000000000
--- a/lib/libc/musl/src/string/wcsncmp.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <wchar.h>
-
-int wcsncmp(const wchar_t *l, const wchar_t *r, size_t n)
-{
-	for (; n && *l==*r && *l && *r; n--, l++, r++);
-	return n ? (*l < *r ? -1 : *l > *r) : 0;
-}
diff --git a/lib/libc/musl/src/string/wcsncpy.c b/lib/libc/musl/src/string/wcsncpy.c
deleted file mode 100644
index 4bede04d25..0000000000
--- a/lib/libc/musl/src/string/wcsncpy.c
+++ /dev/null
@@ -1,9 +0,0 @@
-#include <wchar.h>
-
-wchar_t *wcsncpy(wchar_t *restrict d, const wchar_t *restrict s, size_t n)
-{
-	wchar_t *a = d;
-	while (n && *s) n--, *d++ = *s++;
-	wmemset(d, 0, n);
-	return a;
-}
diff --git a/lib/libc/musl/src/string/wcsnlen.c b/lib/libc/musl/src/string/wcsnlen.c
deleted file mode 100644
index a776337314..0000000000
--- a/lib/libc/musl/src/string/wcsnlen.c
+++ /dev/null
@@ -1,8 +0,0 @@
-#include <wchar.h>
-
-size_t wcsnlen(const wchar_t *s, size_t n)
-{
-	const wchar_t *z = wmemchr(s, 0, n);
-	if (z) n = z-s;
-	return n;
-}
diff --git a/lib/libc/musl/src/string/wcspbrk.c b/lib/libc/musl/src/string/wcspbrk.c
deleted file mode 100644
index 0c72c197b3..0000000000
--- a/lib/libc/musl/src/string/wcspbrk.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <wchar.h>
-
-wchar_t *wcspbrk(const wchar_t *s, const wchar_t *b)
-{
-	s += wcscspn(s, b);
-	return *s ? (wchar_t *)s : NULL;
-}
diff --git a/lib/libc/musl/src/string/wcsrchr.c b/lib/libc/musl/src/string/wcsrchr.c
deleted file mode 100644
index 8961b9e2f8..0000000000
--- a/lib/libc/musl/src/string/wcsrchr.c
+++ /dev/null
@@ -1,8 +0,0 @@
-#include <wchar.h>
-
-wchar_t *wcsrchr(const wchar_t *s, wchar_t c)
-{
-	const wchar_t *p;
-	for (p=s+wcslen(s); p>=s && *p!=c; p--);
-	return p>=s ? (wchar_t *)p : 0;
-}
diff --git a/lib/libc/musl/src/string/wcsspn.c b/lib/libc/musl/src/string/wcsspn.c
deleted file mode 100644
index 4320d8f6b7..0000000000
--- a/lib/libc/musl/src/string/wcsspn.c
+++ /dev/null
@@ -1,8 +0,0 @@
-#include <wchar.h>
-
-size_t wcsspn(const wchar_t *s, const wchar_t *c)
-{
-	const wchar_t *a;
-	for (a=s; *s && wcschr(c, *s); s++);
-	return s-a;
-}
diff --git a/lib/libc/musl/src/string/wcsstr.c b/lib/libc/musl/src/string/wcsstr.c
deleted file mode 100644
index 4caaef3c94..0000000000
--- a/lib/libc/musl/src/string/wcsstr.c
+++ /dev/null
@@ -1,105 +0,0 @@
-#include <wchar.h>
-
-#define MAX(a,b) ((a)>(b)?(a):(b))
-#define MIN(a,b) ((a)<(b)?(a):(b))
-
-static wchar_t *twoway_wcsstr(const wchar_t *h, const wchar_t *n)
-{
-	const wchar_t *z;
-	size_t l, ip, jp, k, p, ms, p0, mem, mem0;
-
-	/* Computing length of needle */
-	for (l=0; n[l] && h[l]; l++);
-	if (n[l]) return 0; /* hit the end of h */
-
-	/* Compute maximal suffix */
-	ip = -1; jp = 0; k = p = 1;
-	while (jp+k<l) {
-		if (n[ip+k] == n[jp+k]) {
-			if (k == p) {
-				jp += p;
-				k = 1;
-			} else k++;
-		} else if (n[ip+k] > n[jp+k]) {
-			jp += k;
-			k = 1;
-			p = jp - ip;
-		} else {
-			ip = jp++;
-			k = p = 1;
-		}
-	}
-	ms = ip;
-	p0 = p;
-
-	/* And with the opposite comparison */
-	ip = -1; jp = 0; k = p = 1;
-	while (jp+k<l) {
-		if (n[ip+k] == n[jp+k]) {
-			if (k == p) {
-				jp += p;
-				k = 1;
-			} else k++;
-		} else if (n[ip+k] < n[jp+k]) {
-			jp += k;
-			k = 1;
-			p = jp - ip;
-		} else {
-			ip = jp++;
-			k = p = 1;
-		}
-	}
-	if (ip+1 > ms+1) ms = ip;
-	else p = p0;
-
-	/* Periodic needle? */
-	if (wmemcmp(n, n+p, ms+1)) {
-		mem0 = 0;
-		p = MAX(ms, l-ms-1) + 1;
-	} else mem0 = l-p;
-	mem = 0;
-
-	/* Initialize incremental end-of-haystack pointer */
-	z = h;
-
-	/* Search loop */
-	for (;;) {
-		/* Update incremental end-of-haystack pointer */
-		if (z-h < l) {
-			/* Fast estimate for MIN(l,63) */
-			size_t grow = l | 63;
-			const wchar_t *z2 = wmemchr(z, 0, grow);
-			if (z2) {
-				z = z2;
-				if (z-h < l) return 0;
-			} else z += grow;
-		}
-
-		/* Compare right half */
-		for (k=MAX(ms+1,mem); n[k] && n[k] == h[k]; k++);
-		if (n[k]) {
-			h += k-ms;
-			mem = 0;
-			continue;
-		}
-		/* Compare left half */
-		for (k=ms+1; k>mem && n[k-1] == h[k-1]; k--);
-		if (k <= mem) return (wchar_t *)h;
-		h += p;
-		mem = mem0;
-	}
-}
-
-wchar_t *wcsstr(const wchar_t *restrict h, const wchar_t *restrict n)
-{
-	/* Return immediately on empty needle or haystack */
-	if (!n[0]) return (wchar_t *)h;
-	if (!h[0]) return 0;
-
-	/* Use faster algorithms for short needles */
-	h = wcschr(h, *n);
-	if (!h || !n[1]) return (wchar_t *)h;
-	if (!h[1]) return 0;
-
-	return twoway_wcsstr(h, n);
-}
diff --git a/lib/libc/musl/src/string/wcswcs.c b/lib/libc/musl/src/string/wcswcs.c
deleted file mode 100644
index 9cfe4ac40b..0000000000
--- a/lib/libc/musl/src/string/wcswcs.c
+++ /dev/null
@@ -1,6 +0,0 @@
-#include <wchar.h>
-
-wchar_t *wcswcs(const wchar_t *haystack, const wchar_t *needle)
-{
-	return wcsstr(haystack, needle);
-}
diff --git a/lib/libc/musl/src/string/wmemchr.c b/lib/libc/musl/src/string/wmemchr.c
deleted file mode 100644
index 2bc2c2702c..0000000000
--- a/lib/libc/musl/src/string/wmemchr.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <wchar.h>
-
-wchar_t *wmemchr(const wchar_t *s, wchar_t c, size_t n)
-{
-	for (; n && *s != c; n--, s++);
-	return n ? (wchar_t *)s : 0;
-}
diff --git a/lib/libc/musl/src/string/wmemcmp.c b/lib/libc/musl/src/string/wmemcmp.c
deleted file mode 100644
index 717d77b174..0000000000
--- a/lib/libc/musl/src/string/wmemcmp.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <wchar.h>
-
-int wmemcmp(const wchar_t *l, const wchar_t *r, size_t n)
-{
-	for (; n && *l==*r; n--, l++, r++);
-	return n ? (*l < *r ? -1 : *l > *r) : 0;
-}
diff --git a/lib/libc/musl/src/string/wmemcpy.c b/lib/libc/musl/src/string/wmemcpy.c
deleted file mode 100644
index 52e6e6e07b..0000000000
--- a/lib/libc/musl/src/string/wmemcpy.c
+++ /dev/null
@@ -1,8 +0,0 @@
-#include <wchar.h>
-
-wchar_t *wmemcpy(wchar_t *restrict d, const wchar_t *restrict s, size_t n)
-{
-	wchar_t *a = d;
-	while (n--) *d++ = *s++;
-	return a;
-}
diff --git a/lib/libc/musl/src/string/wmemmove.c b/lib/libc/musl/src/string/wmemmove.c
deleted file mode 100644
index 964c903299..0000000000
--- a/lib/libc/musl/src/string/wmemmove.c
+++ /dev/null
@@ -1,13 +0,0 @@
-#include <wchar.h>
-#include <stdint.h>
-
-wchar_t *wmemmove(wchar_t *d, const wchar_t *s, size_t n)
-{
-	wchar_t *d0 = d;
-	if (d == s) return d;
-	if ((uintptr_t)d-(uintptr_t)s < n * sizeof *d)
-		while (n--) d[n] = s[n];
-	else
-		while (n--) *d++ = *s++;
-	return d0;
-}
diff --git a/lib/libc/musl/src/string/wmemset.c b/lib/libc/musl/src/string/wmemset.c
deleted file mode 100644
index 07a037a0f9..0000000000
--- a/lib/libc/musl/src/string/wmemset.c
+++ /dev/null
@@ -1,8 +0,0 @@
-#include <wchar.h>
-
-wchar_t *wmemset(wchar_t *d, wchar_t c, size_t n)
-{
-	wchar_t *ret = d;
-	while (n--) *d++ = c;
-	return ret;
-}
diff --git a/lib/std/c.zig b/lib/std/c.zig
index 535f0f7909..97136976ae 100644
--- a/lib/std/c.zig
+++ b/lib/std/c.zig
@@ -11067,6 +11067,16 @@ pub const imaxdiv_t = extern struct {
 pub const intmax_t = i64;
 pub const uintmax_t = u64;
 
+pub const wint_t = switch (builtin.target.os.tag) {
+    .windows => u16,
+    else => i32,
+};
+
+pub const wchar_t = switch (builtin.target.os.tag) {
+    .windows => u16,
+    else => if (builtin.target.cpu.arch.isArm() or builtin.target.cpu.arch.isAARCH64()) u32 else i32,
+};
+
 pub extern "c" fn pthread_getthreadid_np() c_int;
 pub extern "c" fn pthread_set_name_np(thread: pthread_t, name: [*:0]const u8) void;
 pub extern "c" fn pthread_get_name_np(thread: pthread_t, name: [*:0]u8, len: usize) void;
diff --git a/src/libs/mingw.zig b/src/libs/mingw.zig
index eb9eb25a34..6bb4cb89cb 100644
--- a/src/libs/mingw.zig
+++ b/src/libs/mingw.zig
@@ -681,7 +681,6 @@ const mingw32_generic_src = [_][]const u8{
     "misc" ++ path.sep_str ++ "tfind.c",
     "misc" ++ path.sep_str ++ "tsearch.c",
     "misc" ++ path.sep_str ++ "twalk.c",
-    "misc" ++ path.sep_str ++ "wcsnlen.c",
     "misc" ++ path.sep_str ++ "wcstof.c",
     "misc" ++ path.sep_str ++ "wcstoimax.c",
     "misc" ++ path.sep_str ++ "wcstold.c",
@@ -691,12 +690,6 @@ const mingw32_generic_src = [_][]const u8{
     "misc" ++ path.sep_str ++ "winbs_uint64.c",
     "misc" ++ path.sep_str ++ "winbs_ulong.c",
     "misc" ++ path.sep_str ++ "winbs_ushort.c",
-    "misc" ++ path.sep_str ++ "wmemchr.c",
-    "misc" ++ path.sep_str ++ "wmemcmp.c",
-    "misc" ++ path.sep_str ++ "wmemcpy.c",
-    "misc" ++ path.sep_str ++ "wmemmove.c",
-    "misc" ++ path.sep_str ++ "wmempcpy.c",
-    "misc" ++ path.sep_str ++ "wmemset.c",
     "stdio" ++ path.sep_str ++ "_Exit.c",
     "stdio" ++ path.sep_str ++ "_findfirst64i32.c",
     "stdio" ++ path.sep_str ++ "_findnext64i32.c",
diff --git a/src/libs/musl.zig b/src/libs/musl.zig
index cf5feb0374..d72e31de7c 100644
--- a/src/libs/musl.zig
+++ b/src/libs/musl.zig
@@ -1651,34 +1651,12 @@ const src_files = [_][]const u8{
     "musl/src/string/strtok_r.c",
     "musl/src/string/strverscmp.c",
     "musl/src/string/swab.c",
-    "musl/src/string/wcpcpy.c",
-    "musl/src/string/wcpncpy.c",
     "musl/src/string/wcscasecmp.c",
     "musl/src/string/wcscasecmp_l.c",
-    "musl/src/string/wcscat.c",
-    "musl/src/string/wcschr.c",
-    "musl/src/string/wcscmp.c",
-    "musl/src/string/wcscpy.c",
-    "musl/src/string/wcscspn.c",
     "musl/src/string/wcsdup.c",
-    "musl/src/string/wcslen.c",
     "musl/src/string/wcsncasecmp.c",
     "musl/src/string/wcsncasecmp_l.c",
-    "musl/src/string/wcsncat.c",
-    "musl/src/string/wcsncmp.c",
-    "musl/src/string/wcsncpy.c",
-    "musl/src/string/wcsnlen.c",
-    "musl/src/string/wcspbrk.c",
-    "musl/src/string/wcsrchr.c",
-    "musl/src/string/wcsspn.c",
-    "musl/src/string/wcsstr.c",
     "musl/src/string/wcstok.c",
-    "musl/src/string/wcswcs.c",
-    "musl/src/string/wmemchr.c",
-    "musl/src/string/wmemcmp.c",
-    "musl/src/string/wmemcpy.c",
-    "musl/src/string/wmemmove.c",
-    "musl/src/string/wmemset.c",
     "musl/src/temp/mkdtemp.c",
     "musl/src/temp/mkostemp.c",
     "musl/src/temp/mkostemps.c",
diff --git a/src/libs/wasi_libc.zig b/src/libs/wasi_libc.zig
index c801a805f1..f40bb3f6a7 100644
--- a/src/libs/wasi_libc.zig
+++ b/src/libs/wasi_libc.zig
@@ -999,34 +999,12 @@ const libc_top_half_src_files = [_][]const u8{
     "musl/src/string/strtok_r.c",
     "musl/src/string/strverscmp.c",
     "musl/src/string/swab.c",
-    "musl/src/string/wcpcpy.c",
-    "musl/src/string/wcpncpy.c",
     "musl/src/string/wcscasecmp.c",
     "musl/src/string/wcscasecmp_l.c",
-    "musl/src/string/wcscat.c",
-    "musl/src/string/wcschr.c",
-    "musl/src/string/wcscmp.c",
-    "musl/src/string/wcscpy.c",
-    "musl/src/string/wcscspn.c",
     "musl/src/string/wcsdup.c",
-    "musl/src/string/wcslen.c",
     "musl/src/string/wcsncasecmp.c",
     "musl/src/string/wcsncasecmp_l.c",
-    "musl/src/string/wcsncat.c",
-    "musl/src/string/wcsncmp.c",
-    "musl/src/string/wcsncpy.c",
-    "musl/src/string/wcsnlen.c",
-    "musl/src/string/wcspbrk.c",
-    "musl/src/string/wcsrchr.c",
-    "musl/src/string/wcsspn.c",
-    "musl/src/string/wcsstr.c",
     "musl/src/string/wcstok.c",
-    "musl/src/string/wcswcs.c",
-    "musl/src/string/wmemchr.c",
-    "musl/src/string/wmemcmp.c",
-    "musl/src/string/wmemcpy.c",
-    "musl/src/string/wmemmove.c",
-    "musl/src/string/wmemset.c",
     "musl/src/thread/default_attr.c",
     "musl/src/thread/pthread_attr_destroy.c",
     "musl/src/thread/pthread_attr_init.c",