Re: Is / distinct from //?

[Paul Eggert]

Paul Gilmartin <address@hidden> writes:

> Just thought you'd like to know,

Yes.  We can fix this in m4/double-slash-root.m4.  Can you please
confirm the following?

1.  If you run this shell command:

       wc //dev/null >/dev/null 2>&1
       echo status = $?

    then the output is "status = 1" or some nonzero status like that.

2.  In coreutils, the command build-aux/config.guess outputs
    "i370-ibm-openedition".

If my guesses are right, the following patch should work, but I'd
like you to confirm my guesses before installing this.  Thanks.

2006-12-17  Paul Eggert  <address@hidden

        * m4/double-slash-root.m4 (gl_DOUBLE_SLASH_ROOT):
        Port to z/OS.  Problem reported by Paul Gilmartin.

--- m4/double-slash-root.m4.~1.1.~      2006-07-03 01:32:46.000000000 -0700
+++ m4/double-slash-root.m4     2006-12-17 23:20:58.000000000 -0800
@@ -1,4 +1,4 @@
-#serial 1   -*- autoconf -*-
+#serial 2   -*- autoconf -*-
 dnl Copyright (C) 2006 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -11,12 +11,12 @@ AC_DEFUN([gl_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)
-       # and Cygwin.  If anyone knows of another system for which // has
+       # 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
        # <address@hidden>.
        case $host in
-         *-cygwin)
+         *-cygwin | i370-ibm-openedition)
            ac_cv_double_slash_root=yes ;;
          *)
            # Be optimistic and assume that / and // are the same when we
@@ -25,7 +25,7 @@ AC_DEFUN([gl_DOUBLE_SLASH_ROOT],
        esac
       else
        set x `ls -di / //`
-       if test $[2] = $[4]; then
+       if test $[2] = $[4] && wc //dev/null >/dev/null 2>&1; then
          ac_cv_double_slash_root=no
        else
          ac_cv_double_slash_root=yes