|
267
|
1 # double-slash-root.m4 serial 4 -*- Autoconf -*-
|
|
|
2 dnl Copyright (C) 2006, 2008, 2009 Free Software Foundation, Inc.
|
|
|
3 dnl This file is free software; the Free Software Foundation
|
|
|
4 dnl gives unlimited permission to copy and/or distribute it,
|
|
|
5 dnl with or without modifications, as long as this notice is preserved.
|
|
|
6
|
|
|
7 AC_DEFUN([gl_DOUBLE_SLASH_ROOT],
|
|
|
8 [
|
|
|
9 AC_REQUIRE([AC_CANONICAL_HOST])
|
|
|
10 AC_CACHE_CHECK([whether // is distinct from /], [gl_cv_double_slash_root],
|
|
|
11 [ if test x"$cross_compiling" = xyes ; then
|
|
|
12 # When cross-compiling, there is no way to tell whether // is special
|
|
|
13 # short of a list of hosts. However, the only known hosts to date
|
|
|
14 # that have a distinct // are Apollo DomainOS (too old to port to),
|
|
|
15 # Cygwin, and z/OS. If anyone knows of another system for which // has
|
|
|
16 # special semantics and is distinct from /, please report it to
|
|
|
17 # <bug-gnulib@gnu.org>.
|
|
|
18 case $host in
|
|
|
19 *-cygwin | i370-ibm-openedition)
|
|
|
20 gl_cv_double_slash_root=yes ;;
|
|
|
21 *)
|
|
|
22 # Be optimistic and assume that / and // are the same when we
|
|
|
23 # don't know.
|
|
|
24 gl_cv_double_slash_root='unknown, assuming no' ;;
|
|
|
25 esac
|
|
|
26 else
|
|
|
27 set x `ls -di / // 2>/dev/null`
|
|
|
28 if test "$[2]" = "$[4]" && wc //dev/null >/dev/null 2>&1; then
|
|
|
29 gl_cv_double_slash_root=no
|
|
|
30 else
|
|
|
31 gl_cv_double_slash_root=yes
|
|
|
32 fi
|
|
|
33 fi])
|
|
|
34 if test "$gl_cv_double_slash_root" = yes; then
|
|
|
35 AC_DEFINE([DOUBLE_SLASH_IS_DISTINCT_ROOT], [1],
|
|
|
36 [Define to 1 if // is a file system root distinct from /.])
|
|
|
37 fi
|
|
|
38 ])
|
