diff --git a/libc/upstream-openbsd/lib/libc/gen/ctype_.c b/libc/upstream-openbsd/lib/libc/gen/ctype_.c
new file mode 100644
index 0000000..89c8257
--- /dev/null
+++ b/libc/upstream-openbsd/lib/libc/gen/ctype_.c
@@ -0,0 +1,76 @@
+/*	$OpenBSD: ctype_.c,v 1.10 2011/09/22 09:06:10 stsp Exp $ */
+/*
+ * Copyright (c) 1989 The Regents of the University of California.
+ * All rights reserved.
+ * (c) UNIX System Laboratories, Inc.
+ * All or some portions of this file are derived from material licensed
+ * to the University of California by American Telephone and Telegraph
+ * Co. or Unix System Laboratories, Inc. and are reproduced herein with
+ * the permission of UNIX System Laboratories, Inc.
+ *
+ * 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.
+ */
+
+#include <ctype.h>
+#include "ctype_private.h"
+
+const char _C_ctype_[1 + CTYPE_NUM_CHARS] = {
+	0,
+	_C,	_C,	_C,	_C,	_C,	_C,	_C,	_C,
+	_C,	_C|_S,	_C|_S,	_C|_S,	_C|_S,	_C|_S,	_C,	_C,
+	_C,	_C,	_C,	_C,	_C,	_C,	_C,	_C,
+	_C,	_C,	_C,	_C,	_C,	_C,	_C,	_C,
+   _S|(char)_B,	_P,	_P,	_P,	_P,	_P,	_P,	_P,
+	_P,	_P,	_P,	_P,	_P,	_P,	_P,	_P,
+	_N,	_N,	_N,	_N,	_N,	_N,	_N,	_N,
+	_N,	_N,	_P,	_P,	_P,	_P,	_P,	_P,
+	_P,	_U|_X,	_U|_X,	_U|_X,	_U|_X,	_U|_X,	_U|_X,	_U,
+	_U,	_U,	_U,	_U,	_U,	_U,	_U,	_U,
+	_U,	_U,	_U,	_U,	_U,	_U,	_U,	_U,
+	_U,	_U,	_U,	_P,	_P,	_P,	_P,	_P,
+	_P,	_L|_X,	_L|_X,	_L|_X,	_L|_X,	_L|_X,	_L|_X,	_L,
+	_L,	_L,	_L,	_L,	_L,	_L,	_L,	_L,
+	_L,	_L,	_L,	_L,	_L,	_L,	_L,	_L,
+	_L,	_L,	_L,	_P,	_P,	_P,	_P,	_C,
+
+	 0,	 0,	 0,	 0,	 0,	 0,	 0,	 0, /* 80 */
+	 0,	 0,	 0,	 0,	 0,	 0,	 0,	 0, /* 88 */
+	 0,	 0,	 0,	 0,	 0,	 0,	 0,	 0, /* 90 */
+	 0,	 0,	 0,	 0,	 0,	 0,	 0,	 0, /* 98 */
+	 0,	 0,	 0,	 0,	 0,	 0,	 0,	 0, /* A0 */
+	 0,	 0,	 0,	 0,	 0,	 0,	 0,	 0, /* A8 */
+	 0,	 0,	 0,	 0,	 0,	 0,	 0,	 0, /* B0 */
+	 0,	 0,	 0,	 0,	 0,	 0,	 0,	 0, /* B8 */
+	 0,	 0,	 0,	 0,	 0,	 0,	 0,	 0, /* C0 */
+	 0,	 0,	 0,	 0,	 0,	 0,	 0,	 0, /* C8 */
+	 0,	 0,	 0,	 0,	 0,	 0,	 0,	 0, /* D0 */
+	 0,	 0,	 0,	 0,	 0,	 0,	 0,	 0, /* D8 */
+	 0,	 0,	 0,	 0,	 0,	 0,	 0,	 0, /* E0 */
+	 0,	 0,	 0,	 0,	 0,	 0,	 0,	 0, /* E8 */
+	 0,	 0,	 0,	 0,	 0,	 0,	 0,	 0, /* F0 */
+	 0,	 0,	 0,	 0,	 0,	 0,	 0,	 0  /* F8 */
+};
+
+const char *_ctype_ = _C_ctype_;
diff --git a/libc/upstream-openbsd/lib/libc/gen/isctype.c b/libc/upstream-openbsd/lib/libc/gen/isctype.c
new file mode 100644
index 0000000..970b5e2
--- /dev/null
+++ b/libc/upstream-openbsd/lib/libc/gen/isctype.c
@@ -0,0 +1,150 @@
+/*	$OpenBSD: isctype.c,v 1.11 2005/08/08 08:05:34 espie Exp $ */
+/*
+ * Copyright (c) 1989 The Regents of the University of California.
+ * All rights reserved.
+ * (c) UNIX System Laboratories, Inc.
+ * All or some portions of this file are derived from material licensed
+ * to the University of California by American Telephone and Telegraph
+ * Co. or Unix System Laboratories, Inc. and are reproduced herein with
+ * the permission of UNIX System Laboratories, Inc.
+ *
+ * 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.
+ */
+
+#define _ANSI_LIBRARY
+#include <ctype.h>
+#include <stdio.h>
+
+#undef isalnum
+int
+isalnum(int c)
+{
+	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & (_U|_L|_N)));
+}
+
+#undef isalpha
+int
+isalpha(int c)
+{
+	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & (_U|_L)));
+}
+
+#undef isblank
+int
+isblank(int c)
+{
+	return (c == ' ' || c == '\t');
+}
+
+#undef iscntrl
+int
+iscntrl(int c)
+{
+	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & _C));
+}
+
+#undef isdigit
+int
+isdigit(int c)
+{
+	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & _N));
+}
+
+#undef isgraph
+int
+isgraph(int c)
+{
+	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & (_P|_U|_L|_N)));
+}
+
+#undef islower
+int
+islower(int c)
+{
+	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & _L));
+}
+
+#undef isprint
+int
+isprint(int c)
+{
+	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & (_P|_U|_L|_N|_B)));
+}
+
+#undef ispunct
+int
+ispunct(int c)
+{
+	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & _P));
+}
+
+#undef isspace
+int
+isspace(int c)
+{
+	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & _S));
+}
+
+#undef isupper
+int
+isupper(int c)
+{
+	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & _U));
+}
+
+#undef isxdigit
+int
+isxdigit(int c)
+{
+	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & (_N|_X)));
+}
+
+#undef isascii
+int
+isascii(int c)
+{
+	return ((unsigned int)c <= 0177);
+}
+
+#undef toascii
+int
+toascii(int c)
+{
+	return (c & 0177);
+}
+
+#undef _toupper
+int
+_toupper(int c)
+{
+	return (c - 'a' + 'A');
+}
+
+#undef _tolower
+int
+_tolower(int c)
+{
+	return (c - 'A' + 'a');
+}
diff --git a/libc/upstream-openbsd/lib/libc/include/ctype_private.h b/libc/upstream-openbsd/lib/libc/include/ctype_private.h
new file mode 100644
index 0000000..39cc792
--- /dev/null
+++ b/libc/upstream-openbsd/lib/libc/include/ctype_private.h
@@ -0,0 +1,7 @@
+/* $OpenBSD: ctype_private.h,v 1.1 2005/08/08 05:53:00 espie Exp $ */
+/* Written by Marc Espie, public domain */
+#define CTYPE_NUM_CHARS       256
+extern const char _C_ctype_[];
+extern const short _C_toupper_[];
+extern const short _C_tolower_[];
+
diff --git a/libc/upstream-openbsd/openbsd-compat.h b/libc/upstream-openbsd/openbsd-compat.h
index 2c3fe56..b55f390 100644
--- a/libc/upstream-openbsd/openbsd-compat.h
+++ b/libc/upstream-openbsd/openbsd-compat.h
@@ -20,4 +20,16 @@
 #define _GNU_SOURCE
 #define __USE_BSD
 
+/* OpenBSD's <ctype.h> uses these names, which conflicted with stlport.
+ * Additionally, we changed the numeric/digit type from N to D for libcxx.
+ */
+#define _U _CTYPE_U
+#define _L _CTYPE_L
+#define _N _CTYPE_D
+#define _S _CTYPE_S
+#define _P _CTYPE_P
+#define _C _CTYPE_C
+#define _X _CTYPE_X
+#define _B _CTYPE_B
+
 #endif