Fix to use mempcpy instead of __mempcpy. This is needed for uclibc which
doesn't define __mempcpy only mempcpy. Since both uclibc and glibc have
mempcpy we'll just use that instead.

Index: grep-2.5.1/intl/localealias.c
===================================================================
--- grep-2.5.1.orig/intl/localealias.c	2002-03-14 00:39:06.000000000 +1100
+++ grep-2.5.1/intl/localealias.c	2007-05-17 13:53:58.000000000 +1000
@@ -65,7 +65,7 @@
 # define strcasecmp __strcasecmp
 
 # ifndef mempcpy
-#  define mempcpy __mempcpy
+#  error "mempcpy not detected"
 # endif
 # define HAVE_MEMPCPY	1
 # define HAVE___FSETLOCKING	1
Index: grep-2.5.1/lib/getopt.c
===================================================================
--- grep-2.5.1.orig/lib/getopt.c	2001-03-04 16:33:12.000000000 +1100
+++ grep-2.5.1/lib/getopt.c	2007-05-17 13:51:44.000000000 +1000
@@ -326,7 +326,7 @@
 	nonoption_flags_len = nonoption_flags_max_len = 0;
       else
 	{
-	  memset (__mempcpy (new_str, __getopt_nonoption_flags,
+	  memset (mempcpy (new_str, __getopt_nonoption_flags,
 			     nonoption_flags_max_len),
 		  '\0', top + 1 - nonoption_flags_max_len);
 	  nonoption_flags_max_len = top + 1;
@@ -437,7 +437,7 @@
 	      if (__getopt_nonoption_flags == NULL)
 		nonoption_flags_max_len = -1;
 	      else
-		memset (__mempcpy (__getopt_nonoption_flags, orig_str, len),
+		memset (mempcpy (__getopt_nonoption_flags, orig_str, len),
 			'\0', nonoption_flags_max_len - len);
 	    }
 	}
Index: grep-2.5.1/lib/regex.c
===================================================================
--- grep-2.5.1.orig/lib/regex.c	2001-04-03 04:04:45.000000000 +1000
+++ grep-2.5.1/lib/regex.c	2007-05-17 13:51:48.000000000 +1000
@@ -7842,7 +7842,7 @@
       if (msg_size > errbuf_size)
         {
 #if defined HAVE_MEMPCPY || defined _LIBC
-	  *((char *) __mempcpy (errbuf, msg, errbuf_size - 1)) = '\0';
+	  *((char *) mempcpy (errbuf, msg, errbuf_size - 1)) = '\0';
 #else
           memcpy (errbuf, msg, errbuf_size - 1);
           errbuf[errbuf_size - 1] = 0;