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diff --git a/gcc-4.2.1-5666.3/gcc/prefix.c b/gcc-4.2.1-5666.3/gcc/prefix.c
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+/* Utility to update paths from internal to external forms.
+ Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
+ Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU Library General Public License as published by
+the Free Software Foundation; either version 2 of the License, or (at
+your option) any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with GCC; see the file COPYING. If not, write to the Free
+Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
+
+/* This file contains routines to update a path, both to canonicalize
+ the directory format and to handle any prefix translation.
+
+ This file must be compiled with -DPREFIX= to specify the "prefix"
+ value used by configure. If a filename does not begin with this
+ prefix, it will not be affected other than by directory canonicalization.
+
+ Each caller of 'update_path' may specify both a filename and
+ a translation prefix and consist of the name of the package that contains
+ the file ("@GCC", "@BINUTIL", "@GNU", etc).
+
+ If the prefix is not specified, the filename will only undergo
+ directory canonicalization.
+
+ If it is specified, the string given by PREFIX will be replaced
+ by the specified prefix (with a '@' in front unless the prefix begins
+ with a '$') and further translation will be done as follows
+ until none of the two conditions below are met:
+
+ 1) If the filename begins with '@', the string between the '@' and
+ the end of the name or the first '/' or directory separator will
+ be considered a "key" and looked up as follows:
+
+ -- If this is a Win32 OS, then the Registry will be examined for
+ an entry of "key" in
+
+ HKEY_LOCAL_MACHINE\SOFTWARE\Free Software Foundation\<KEY>
+
+ if found, that value will be used. <KEY> defaults to GCC version
+ string, but can be overridden at configuration time.
+
+ -- If not found (or not a Win32 OS), the environment variable
+ key_ROOT (the value of "key" concatenated with the constant "_ROOT")
+ is tried. If that fails, then PREFIX (see above) is used.
+
+ 2) If the filename begins with a '$', the rest of the string up
+ to the end or the first '/' or directory separator will be used
+ as an environment variable, whose value will be returned.
+
+ Once all this is done, any '/' will be converted to DIR_SEPARATOR,
+ if they are different.
+
+ NOTE: using resolve_keyed_path under Win32 requires linking with
+ advapi32.dll. */
+
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#if defined(_WIN32) && defined(ENABLE_WIN32_REGISTRY)
+#include <windows.h>
+#endif
+#include "prefix.h"
+
+static const char *std_prefix = PREFIX;
+
+static const char *get_key_value (char *);
+static char *translate_name (char *);
+static char *save_string (const char *, int);
+static void tr (char *, int, int);
+
+#if defined(_WIN32) && defined(ENABLE_WIN32_REGISTRY)
+static char *lookup_key (char *);
+static HKEY reg_key = (HKEY) INVALID_HANDLE_VALUE;
+#endif
+
+/* Given KEY, as above, return its value. */
+
+static const char *
+get_key_value (char *key)
+{
+ const char *prefix = 0;
+ char *temp = 0;
+
+#if defined(_WIN32) && defined(ENABLE_WIN32_REGISTRY)
+ prefix = lookup_key (key);
+#endif
+
+ if (prefix == 0)
+ prefix = getenv (temp = concat (key, "_ROOT", NULL));
+
+ if (prefix == 0)
+ prefix = std_prefix;
+
+ if (temp)
+ free (temp);
+
+ return prefix;
+}
+
+/* Return a copy of a string that has been placed in the heap. */
+
+static char *
+save_string (const char *s, int len)
+{
+ char *result = XNEWVEC (char, len + 1);
+
+ memcpy (result, s, len);
+ result[len] = 0;
+ return result;
+}
+
+#if defined(_WIN32) && defined(ENABLE_WIN32_REGISTRY)
+
+#ifndef WIN32_REGISTRY_KEY
+# define WIN32_REGISTRY_KEY BASEVER
+#endif
+
+/* Look up "key" in the registry, as above. */
+
+static char *
+lookup_key (char *key)
+{
+ char *dst;
+ DWORD size;
+ DWORD type;
+ LONG res;
+
+ if (reg_key == (HKEY) INVALID_HANDLE_VALUE)
+ {
+ res = RegOpenKeyExA (HKEY_LOCAL_MACHINE, "SOFTWARE", 0,
+ KEY_READ, &reg_key);
+
+ if (res == ERROR_SUCCESS)
+ res = RegOpenKeyExA (reg_key, "Free Software Foundation", 0,
+ KEY_READ, &reg_key);
+
+ if (res == ERROR_SUCCESS)
+ res = RegOpenKeyExA (reg_key, WIN32_REGISTRY_KEY, 0,
+ KEY_READ, &reg_key);
+
+ if (res != ERROR_SUCCESS)
+ {
+ reg_key = (HKEY) INVALID_HANDLE_VALUE;
+ return 0;
+ }
+ }
+
+ size = 32;
+ dst = xmalloc (size);
+
+ res = RegQueryValueExA (reg_key, key, 0, &type, (LPBYTE) dst, &size);
+ if (res == ERROR_MORE_DATA && type == REG_SZ)
+ {
+ dst = xrealloc (dst, size);
+ res = RegQueryValueExA (reg_key, key, 0, &type, (LPBYTE) dst, &size);
+ }
+
+ if (type != REG_SZ || res != ERROR_SUCCESS)
+ {
+ free (dst);
+ dst = 0;
+ }
+
+ return dst;
+}
+#endif
+
+/* If NAME, a malloc-ed string, starts with a '@' or '$', apply the
+ translation rules above and return a newly malloc-ed name.
+ Otherwise, return the given name. */
+
+static char *
+translate_name (char *name)
+{
+ char code;
+ char *key, *old_name;
+ const char *prefix;
+ int keylen;
+
+ for (;;)
+ {
+ code = name[0];
+ if (code != '@' && code != '$')
+ break;
+
+ for (keylen = 0;
+ (name[keylen + 1] != 0 && !IS_DIR_SEPARATOR (name[keylen + 1]));
+ keylen++)
+ ;
+
+ key = (char *) alloca (keylen + 1);
+ strncpy (key, &name[1], keylen);
+ key[keylen] = 0;
+
+ if (code == '@')
+ {
+ prefix = get_key_value (key);
+ if (prefix == 0)
+ prefix = std_prefix;
+ }
+ else
+ prefix = getenv (key);
+
+ if (prefix == 0)
+ prefix = PREFIX;
+
+ /* We used to strip trailing DIR_SEPARATORs here, but that can
+ sometimes yield a result with no separator when one was coded
+ and intended by the user, causing two path components to run
+ together. */
+
+ old_name = name;
+ name = concat (prefix, &name[keylen + 1], NULL);
+ free (old_name);
+ }
+
+ return name;
+}
+
+/* In a NUL-terminated STRING, replace character C1 with C2 in-place. */
+static void
+tr (char *string, int c1, int c2)
+{
+ do
+ {
+ if (*string == c1)
+ *string = c2;
+ }
+ while (*string++);
+}
+
+/* Update PATH using KEY if PATH starts with PREFIX as a directory.
+ The returned string is always malloc-ed, and the caller is
+ responsible for freeing it. */
+
+char *
+update_path (const char *path, const char *key)
+{
+ char *result, *p;
+ const int len = strlen (std_prefix);
+
+ if (! strncmp (path, std_prefix, len)
+ && (IS_DIR_SEPARATOR(path[len])
+ || path[len] == '\0')
+ && key != 0)
+ {
+ bool free_key = false;
+
+ if (key[0] != '$')
+ {
+ key = concat ("@", key, NULL);
+ free_key = true;
+ }
+
+ result = concat (key, &path[len], NULL);
+ if (free_key)
+ free ((char *) key);
+ result = translate_name (result);
+ }
+ else
+ result = xstrdup (path);
+
+#ifndef ALWAYS_STRIP_DOTDOT
+#define ALWAYS_STRIP_DOTDOT 0
+#endif
+
+ p = result;
+ while (1)
+ {
+ char *src, *dest;
+
+ p = strchr (p, '.');
+ if (p == NULL)
+ break;
+ /* Look for `/../' */
+ if (p[1] == '.'
+ && IS_DIR_SEPARATOR (p[2])
+ && (p != result && IS_DIR_SEPARATOR (p[-1])))
+ {
+ *p = 0;
+ if (!ALWAYS_STRIP_DOTDOT && access (result, X_OK) == 0)
+ {
+ *p = '.';
+ break;
+ }
+ else
+ {
+ /* We can't access the dir, so we won't be able to
+ access dir/.. either. Strip out `dir/../'. If `dir'
+ turns out to be `.', strip one more path component. */
+ dest = p;
+ do
+ {
+ --dest;
+ while (dest != result && IS_DIR_SEPARATOR (*dest))
+ --dest;
+ while (dest != result && !IS_DIR_SEPARATOR (dest[-1]))
+ --dest;
+ }
+ while (dest != result && *dest == '.');
+ /* If we have something like `./..' or `/..', don't
+ strip anything more. */
+ if (*dest == '.' || IS_DIR_SEPARATOR (*dest))
+ {
+ *p = '.';
+ break;
+ }
+ src = p + 3;
+ while (IS_DIR_SEPARATOR (*src))
+ ++src;
+ p = dest;
+ while ((*dest++ = *src++) != 0)
+ ;
+ }
+ }
+ else
+ ++p;
+ }
+
+#ifdef UPDATE_PATH_HOST_CANONICALIZE
+ /* Perform host dependent canonicalization when needed. */
+ UPDATE_PATH_HOST_CANONICALIZE (result);
+#endif
+
+#ifdef DIR_SEPARATOR_2
+ /* Convert DIR_SEPARATOR_2 to DIR_SEPARATOR. */
+ if (DIR_SEPARATOR_2 != DIR_SEPARATOR)
+ tr (result, DIR_SEPARATOR_2, DIR_SEPARATOR);
+#endif
+
+#if defined (DIR_SEPARATOR) && !defined (DIR_SEPARATOR_2)
+ if (DIR_SEPARATOR != '/')
+ tr (result, '/', DIR_SEPARATOR);
+#endif
+
+ return result;
+}
+
+/* Reset the standard prefix. */
+void
+set_std_prefix (const char *prefix, int len)
+{
+ std_prefix = save_string (prefix, len);
+}
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