38 lines
1.6 KiB
Text
38 lines
1.6 KiB
Text
# double-slash-root.m4 serial 4 -*- Autoconf -*-
|
|
dnl Copyright (C) 2006, 2008-2013 Free Software Foundation, Inc.
|
|
dnl This file is free software; the Free Software Foundation
|
|
dnl gives unlimited permission to copy and/or distribute it,
|
|
dnl with or without modifications, as long as this notice is preserved.
|
|
|
|
AC_DEFUN([gl_DOUBLE_SLASH_ROOT],
|
|
[
|
|
AC_REQUIRE([AC_CANONICAL_HOST])
|
|
AC_CACHE_CHECK([whether // is distinct from /], [gl_cv_double_slash_root],
|
|
[ if test x"$cross_compiling" = xyes ; then
|
|
# When cross-compiling, there is no way to tell whether // is special
|
|
# short of a list of hosts. However, the only known hosts to date
|
|
# that have a distinct // are Apollo DomainOS (too old to port to),
|
|
# Cygwin, and z/OS. If anyone knows of another system for which // has
|
|
# special semantics and is distinct from /, please report it to
|
|
# <bug-gnulib@gnu.org>.
|
|
case $host in
|
|
*-cygwin | i370-ibm-openedition)
|
|
gl_cv_double_slash_root=yes ;;
|
|
*)
|
|
# Be optimistic and assume that / and // are the same when we
|
|
# don't know.
|
|
gl_cv_double_slash_root='unknown, assuming no' ;;
|
|
esac
|
|
else
|
|
set x `ls -di / // 2>/dev/null`
|
|
if test "$[2]" = "$[4]" && wc //dev/null >/dev/null 2>&1; then
|
|
gl_cv_double_slash_root=no
|
|
else
|
|
gl_cv_double_slash_root=yes
|
|
fi
|
|
fi])
|
|
if test "$gl_cv_double_slash_root" = yes; then
|
|
AC_DEFINE([DOUBLE_SLASH_IS_DISTINCT_ROOT], [1],
|
|
[Define to 1 if // is a file system root distinct from /.])
|
|
fi
|
|
])
|