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Annotation of embedaddon/libiconv/srcm4/double-slash-root.m4, revision 1.1

1.1     ! misho       1: # double-slash-root.m4 serial 4   -*- Autoconf -*-
        !             2: dnl Copyright (C) 2006, 2008-2011 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: ])