Merge index() and strchr() together.

As I looked through the C library, I noticed the FreeBSD MIPS port has a
hand-written version of index(). This is nice, if it weren't for the
fact that most applications call strchr() instead.

Also, on the other architectures index() and strchr() are identical,
meaning we have two identical pieces of code in the C library and
statically linked applications.

Solve this by naming the actual file strchr.[cS] and let it use
__strong_reference()/STRONG_ALIAS() to provide the index() routine. Do
the same for rindex()/strrchr().

This seems to make the C libraries and static binaries slightly smaller,
but this reduction in size seems negligible.

15 files changed, 128 insertions, 279 deletions

diff --git a/lib/libc/Makefile b/lib/libc/Makefile
index 77c7ce0..bcf1797 100644
--- a/lib/libc/Makefile
+++ b/lib/libc/Makefile
@@ -127,8 +127,8 @@ SRCS+=	${_src}
 KQSRCS=	adddi3.c anddi3.c ashldi3.c ashrdi3.c cmpdi2.c divdi3.c iordi3.c \
 	lshldi3.c lshrdi3.c moddi3.c muldi3.c negdi2.c notdi2.c qdivrem.c \
 	subdi3.c ucmpdi2.c udivdi3.c umoddi3.c xordi3.c
-KSRCS=	bcmp.c ffs.c ffsl.c fls.c flsl.c index.c mcount.c rindex.c \
-	strcat.c strcmp.c strcpy.c strlen.c strncpy.c
+KSRCS=	bcmp.c ffs.c ffsl.c fls.c flsl.c mcount.c strcat.c strchr.c \
+	strcmp.c strcpy.c strlen.c strncpy.c strrchr.c
 
 libkern: libkern.gen libkern.${LIBC_ARCH}
 
diff --git a/lib/libc/arm/string/Makefile.inc b/lib/libc/arm/string/Makefile.inc
index 6658ce7..0ba43e6 100644
--- a/lib/libc/arm/string/Makefile.inc
+++ b/lib/libc/arm/string/Makefile.inc
@@ -1,7 +1,6 @@
 #	@(#)Makefile.inc	8.1 (Berkeley) 6/4/93
 # $FreeBSD$
 
-MDSRCS+=bcmp.c bcopy.S bzero.S ffs.S index.c memchr.c memcmp.S memcpy.S \
-	memmove.S memset.S rindex.c strcat.c strchr.c strcmp.S strcpy.c \
-	strlen.S strncmp.S strrchr.c swab.c wcschr.c wcscmp.c wcslen.c \
-	wmemchr.c
+MDSRCS+=bcmp.c bcopy.S bzero.S ffs.S memchr.c memcmp.S memcpy.S \
+	memmove.S memset.S strcat.c strchr.c strcmp.S strcpy.c strlen.S \
+	strncmp.S strrchr.c swab.c wcschr.c wcscmp.c wcslen.c wmemchr.c
diff --git a/lib/libc/i386/string/Makefile.inc b/lib/libc/i386/string/Makefile.inc
index 3292267..f574c8f 100644
--- a/lib/libc/i386/string/Makefile.inc
+++ b/lib/libc/i386/string/Makefile.inc
@@ -1,7 +1,6 @@
 #	@(#)Makefile.inc	8.1 (Berkeley) 6/4/93
 # $FreeBSD$
 
-MDSRCS+=bcmp.S bcopy.S bzero.S ffs.S index.S memchr.S memcmp.S memcpy.S \
-	memmove.S memset.S rindex.S strcat.S strchr.S strcmp.S strcpy.S \
-	strncmp.S strrchr.S swab.S wcschr.S wcscmp.S wcslen.S \
-	wmemchr.S
+MDSRCS+=bcmp.S bcopy.S bzero.S ffs.S memchr.S memcmp.S memcpy.S memmove.S \
+	memset.S strcat.S strchr.S strcmp.S strcpy.S strncmp.S strrchr.S \
+	swab.S wcschr.S wcscmp.S wcslen.S wmemchr.S
diff --git a/lib/libc/i386/string/index.S b/lib/libc/i386/string/index.S
deleted file mode 100644
index 3bdd68d..0000000
--- a/lib/libc/i386/string/index.S
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- * Copyright (c) 1993 Winning Strategies, Inc.
- * All rights reserved.
- *
- * 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. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *      This product includes software developed by Winning Strategies, Inc.
- * 4. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 <machine/asm.h>
-__FBSDID("$FreeBSD$");
-
-/*
- * index(s, c)
- *	return a pointer to the first occurance of the character c in
- *	string s, or NULL if c does not occur in the string.
- *
- * %edx - pointer iterating through string
- * %eax - pointer to first occurance of 'c'
- * %cl  - character we're comparing against
- * %bl  - character at %edx
- *
- * Written by:
- *	J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
- */
-
-ENTRY(index)
-	pushl	%ebx
-	movl	8(%esp),%eax
-	movb	12(%esp),%cl
-	.align 2,0x90
-L1:
-	movb	(%eax),%bl
-	cmpb	%bl,%cl			/* found char??? */
-	je 	L2
-	incl	%eax
-	testb	%bl,%bl			/* null terminator??? */
-	jne	L1
-	xorl	%eax,%eax
-L2:
-	popl	%ebx
-	ret
-END(index)
-
-	.section .note.GNU-stack,"",%progbits
diff --git a/lib/libc/i386/string/rindex.S b/lib/libc/i386/string/rindex.S
deleted file mode 100644
index e59406c9..0000000
--- a/lib/libc/i386/string/rindex.S
+++ /dev/null
@@ -1,67 +0,0 @@
-/*
- * Copyright (c) 1993 Winning Strategies, Inc.
- * All rights reserved.
- *
- * 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. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *      This product includes software developed by Winning Strategies, Inc.
- * 4. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 <machine/asm.h>
-__FBSDID("$FreeBSD$");
-
-/*
- * rindex(s, c)
- *	return a pointer to the last occurance of the character c in
- *	string s, or NULL if c does not occur in the string.
- *
- * %edx - pointer iterating through string
- * %eax - pointer to last occurance of 'c'
- * %cl  - character we're comparing against
- * %bl  - character at %edx
- *
- * Written by:
- *	J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
- */
- 
-ENTRY(rindex)
-	pushl	%ebx
-	movl	8(%esp),%edx
-	movb	12(%esp),%cl
-	xorl	%eax,%eax		/* init pointer to null */
-	.align 2,0x90
-L1:
-	movb	(%edx),%bl
-	cmpb	%bl,%cl
-	jne	L2
-	movl	%edx,%eax
-L2:	
-	incl	%edx
-	testb	%bl,%bl			/* null terminator??? */
-	jne	L1
-	popl	%ebx
-	ret
-END(rindex)
-
-	.section .note.GNU-stack,"",%progbits
diff --git a/lib/libc/i386/string/strchr.S b/lib/libc/i386/string/strchr.S
index ddae795..4162da2 100644
--- a/lib/libc/i386/string/strchr.S
+++ b/lib/libc/i386/string/strchr.S
@@ -63,4 +63,6 @@ L2:
 	ret
 END(strchr)
 
+STRONG_ALIAS(index, strchr)
+
 	.section .note.GNU-stack,"",%progbits
diff --git a/lib/libc/i386/string/strrchr.S b/lib/libc/i386/string/strrchr.S
index 0d7f0ca..a07ecd8 100644
--- a/lib/libc/i386/string/strrchr.S
+++ b/lib/libc/i386/string/strrchr.S
@@ -64,4 +64,6 @@ L2:
 	ret
 END(strrchr)
 
+STRONG_ALIAS(rindex, strrchr)
+
 	.section .note.GNU-stack,"",%progbits
diff --git a/lib/libc/mips/string/Makefile.inc b/lib/libc/mips/string/Makefile.inc
index 48111e5..f37b9af 100644
--- a/lib/libc/mips/string/Makefile.inc
+++ b/lib/libc/mips/string/Makefile.inc
@@ -1,8 +1,8 @@
 #	$NetBSD: Makefile.inc,v 1.2 2000/10/10 21:51:54 jeffs Exp $
 # $FreeBSD$
 
-SRCS+=	bcmp.S bcopy.S bzero.S  ffs.S index.S memchr.c memcmp.c memset.c \
+SRCS+=	bcmp.S bcopy.S bzero.S ffs.S memchr.c memcmp.c memset.c \
 	memcpy.S memmove.S \
-	rindex.S strcat.c strcmp.S strcpy.c strcspn.c strlen.S \
-	strncat.c strncmp.c strncpy.c strpbrk.c strsep.c \
+	strcat.c strchr.S strcmp.S strcpy.c strcspn.c strlen.S \
+	strncat.c strncmp.c strncpy.c strrchr.S strpbrk.c strsep.c \
 	strspn.c strstr.c swab.c
diff --git a/lib/libc/mips/string/index.S b/lib/libc/mips/string/strchr.S
index d1df540..9a9f8dc 100644
--- a/lib/libc/mips/string/index.S
+++ b/lib/libc/mips/string/strchr.S
@@ -44,7 +44,7 @@ __FBSDID("$FreeBSD$");
 	.abicalls
 #endif
 
-LEAF(index)
+LEAF(strchr)
 1:
 	lbu		a2, 0(a0)		# get a byte
 	PTR_ADDU	a0, a0, 1
@@ -56,4 +56,6 @@ notfnd:
 fnd:
 	PTR_SUBU	v0, a0, 1
 	j		ra
-END(index)
+END(strchr)
+
+STRONG_ALIAS(index, strchr)
diff --git a/lib/libc/mips/string/rindex.S b/lib/libc/mips/string/strrchr.S
index e50379e..a742b35 100644
--- a/lib/libc/mips/string/rindex.S
+++ b/lib/libc/mips/string/strrchr.S
@@ -44,7 +44,7 @@ __FBSDID("$FreeBSD$");
 	.abicalls
 #endif
 
-LEAF(rindex)
+LEAF(strrchr)
 	move		v0, zero		# default if not found
 1:
 	lbu		a3, 0(a0)		# get a byte
@@ -54,4 +54,6 @@ LEAF(rindex)
 2:
 	bne		a3, zero, 1b		# continue if not end
 	j		ra
-END(rindex)
+END(strrchr)
+
+STRONG_ALIAS(rindex, strrchr)
diff --git a/lib/libc/string/Makefile.inc b/lib/libc/string/Makefile.inc
index 3673a41..1dbe317 100644
--- a/lib/libc/string/Makefile.inc
+++ b/lib/libc/string/Makefile.inc
@@ -7,8 +7,8 @@ CFLAGS+= -I${.CURDIR}/locale
 
 # machine-independent string sources
 MISRCS+=bcmp.c bcopy.c bzero.c ffs.c ffsl.c ffsll.c fls.c flsl.c flsll.c \
-	index.c memccpy.c memchr.c memrchr.c memcmp.c \
-	memcpy.c memmem.c memmove.c memset.c rindex.c \
+	memccpy.c memchr.c memrchr.c memcmp.c \
+	memcpy.c memmem.c memmove.c memset.c \
 	stpcpy.c stpncpy.c strcasecmp.c \
 	strcat.c strcasestr.c strchr.c strcmp.c strcoll.c strcpy.c strcspn.c \
 	strdup.c strerror.c strlcat.c strlcpy.c strlen.c strmode.c strncat.c \
diff --git a/lib/libc/string/index.c b/lib/libc/string/index.c
deleted file mode 100644
index a3a317d..0000000
--- a/lib/libc/string/index.c
+++ /dev/null
@@ -1,61 +0,0 @@
-/*-
- * Copyright (c) 1990, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * 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.
- * 4. 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.
- */
-
-#if defined(LIBC_SCCS) && !defined(lint)
-static char sccsid[] = "@(#)index.c	8.1 (Berkeley) 6/4/93";
-#endif /* LIBC_SCCS and not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include <stddef.h>
-
-#ifdef STRCHR
-#include <string.h>
-
-char *
-strchr
-#else
-#include <strings.h>
-
-char *
-index
-#endif
-(const char *p, int ch)
-{
-	char c;
-
-	c = ch;
-	for (;; ++p) {
-		if (*p == c)
-			return ((char *)p);
-		if (*p == '\0')
-			return (NULL);
-	}
-	/* NOTREACHED */
-}
diff --git a/lib/libc/string/rindex.c b/lib/libc/string/rindex.c
deleted file mode 100644
index 9fd0bdc..0000000
--- a/lib/libc/string/rindex.c
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- * Copyright (c) 1988, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * 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.
- * 4. 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.
- */
-
-#if defined(LIBC_SCCS) && !defined(lint)
-static char sccsid[] = "@(#)rindex.c	8.1 (Berkeley) 6/4/93";
-#endif /* LIBC_SCCS and not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include <stddef.h>
-
-#ifdef STRRCHR
-#include <string.h>
-
-char *
-strrchr
-#else
-#include <strings.h>
-
-char *
-rindex
-#endif
-(const char *p, int ch)
-{
-	char *save;
-	char c;
-
-	c = ch;
-	for (save = NULL;; ++p) {
-		if (*p == c)
-			save = (char *)p;
-		if (*p == '\0')
-			return (save);
-	}
-	/* NOTREACHED */
-}
diff --git a/lib/libc/string/strchr.c b/lib/libc/string/strchr.c
index 1d82abe..481cb20 100644
--- a/lib/libc/string/strchr.c
+++ b/lib/libc/string/strchr.c
@@ -1,5 +1,54 @@
+/*-
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * 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.
+ * 4. 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)index.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
-#define	STRCHR
-#include "index.c"
+#include <stddef.h>
+#include <string.h>
+
+char *
+strchr(const char *p, int ch)
+{
+	char c;
+
+	c = ch;
+	for (;; ++p) {
+		if (*p == c)
+			return ((char *)p);
+		if (*p == '\0')
+			return (NULL);
+	}
+	/* NOTREACHED */
+}
+
+__strong_reference(strchr, index);
diff --git a/lib/libc/string/strrchr.c b/lib/libc/string/strrchr.c
index 11cbd31..160c4b5 100644
--- a/lib/libc/string/strrchr.c
+++ b/lib/libc/string/strrchr.c
@@ -1,5 +1,55 @@
+/*
+ * Copyright (c) 1988, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * 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.
+ * 4. 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)rindex.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
-#define	STRRCHR
-#include "rindex.c"
+#include <stddef.h>
+#include <string.h>
+
+char *
+strrchr(const char *p, int ch)
+{
+	char *save;
+	char c;
+
+	c = ch;
+	for (save = NULL;; ++p) {
+		if (*p == c)
+			save = (char *)p;
+		if (*p == '\0')
+			return (save);
+	}
+	/* NOTREACHED */
+}
+
+__strong_reference(strrchr, rindex);