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comparison m4/double-slash-root.m4 @ 272:d5392bb5da3c 2.5
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| author | lost |
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| date | Sun, 16 Aug 2009 17:16:49 +0000 |
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| 271:3b793ba7a6c6 | 272:d5392bb5da3c |
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| 1 # double-slash-root.m4 serial 3 -*- Autoconf -*- | |
| 2 dnl Copyright (C) 2006, 2008 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 ]) |