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diff --git a/gdbsupport/pathstuff.h b/gdbsupport/pathstuff.h
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+/* Path manipulation routines for GDB and gdbserver.
+
+   Copyright (C) 1986-2020 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef COMMON_PATHSTUFF_H
+#define COMMON_PATHSTUFF_H
+
+#include "gdbsupport/byte-vector.h"
+
+/* Path utilities.  */
+
+/* Return the real path of FILENAME, expanding all the symbolic links.
+
+   Contrary to "gdb_abspath", this function does not use
+   CURRENT_DIRECTORY for path expansion.  Instead, it relies on the
+   current working directory (CWD) of GDB or gdbserver.  */
+
+extern gdb::unique_xmalloc_ptr<char> gdb_realpath (const char *filename);
+
+/* Return a copy of FILENAME, with its directory prefix canonicalized
+   by gdb_realpath.  */
+
+extern gdb::unique_xmalloc_ptr<char>
+  gdb_realpath_keepfile (const char *filename);
+
+/* Return PATH in absolute form, performing tilde-expansion if necessary.
+   PATH cannot be NULL or the empty string.
+   This does not resolve symlinks however, use gdb_realpath for that.
+
+   Contrary to "gdb_realpath", this function uses CURRENT_DIRECTORY
+   for the path expansion.  This may lead to scenarios the current
+   working directory (CWD) is different than CURRENT_DIRECTORY.
+
+   If CURRENT_DIRECTORY is NULL, this function returns a copy of
+   PATH.  */
+
+extern gdb::unique_xmalloc_ptr<char> gdb_abspath (const char *path);
+
+/* If the path in CHILD is a child of the path in PARENT, return a
+   pointer to the first component in the CHILD's pathname below the
+   PARENT.  Otherwise, return NULL.  */
+
+extern const char *child_path (const char *parent, const char *child);
+
+/* Return whether PATH contains a directory separator character.  */
+
+extern bool contains_dir_separator (const char *path);
+
+/* Get the usual user cache directory for the current platform.
+
+   On Linux, it follows the XDG Base Directory specification: use
+   $XDG_CACHE_HOME/gdb if the XDG_CACHE_HOME environment variable is
+   defined, otherwise $HOME/.cache.
+
+   On macOS, it follows the local convention and uses
+   ~/Library/Caches/gdb.
+
+  The return value is absolute and tilde-expanded.  Return an empty
+  string if neither XDG_CACHE_HOME (on Linux) or HOME are defined.  */
+
+extern std::string get_standard_cache_dir ();
+
+/* Get the usual temporary directory for the current platform.
+
+   On Windows, this is the TMP or TEMP environment variable.
+
+   On the rest, this is the TMPDIR environment variable, if defined, else /tmp.
+
+   Throw an exception on error.  */
+
+extern std::string get_standard_temp_dir ();
+
+/* Return the file name of the user's shell.  Normally this comes from
+   the SHELL environment variable.  */
+
+extern const char *get_shell ();
+
+/* Make a filename suitable to pass to mkstemp based on F (e.g.
+   /tmp/foo -> /tmp/foo-XXXXXX).  */
+
+extern gdb::char_vector make_temp_filename (const std::string &f);
+
+#endif /* COMMON_PATHSTUFF_H */