[SCM] GNU Autoconf source repository branch, master, updated. v2.68-138-g989c790

[Eric Blake]

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- Log -----------------------------------------------------------------
commit 989c790c4f3e24ab68244575bbdf372688e4e8ed
Author: Eric Blake <address@hidden>
Date:   Thu Feb 16 14:29:37 2012 -0700

    docs: tweak 'rm -f' limitations
    
    Based on http://debbugs.gnu.org/10819 and
    http://austingroupbugs.net/view.php?id=542
    
    * doc/autoconf.texi (Limitations of Usual Tools) <rm>: More
    details on 'rm -f' without files.
    
    Signed-off-by: Eric Blake <address@hidden>

-----------------------------------------------------------------------

Summary of changes:
 doc/autoconf.texi |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index 82837a2..607d8dc 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -19225,10 +19225,12 @@ This problem no longer exists in Mac OS X 10.4.3.
 @prindex @command{rm}
 The @option{-f} and @option{-r} options are portable.
 
-It is not portable to invoke @command{rm} without operands.  For
-example, on many systems @samp{rm -f -r} (with no other arguments)
-silently succeeds without doing anything, but it fails with a diagnostic
-on NetBSD 2.0.2.
+It is not portable to invoke @command{rm} without options or operands.
+On the other hand, Posix now requires @command{rm -f} to silently
+succeed when there are no operands (useful for constructs like
address@hidden -rf $filelist} without first checking if @samp{$filelist}
+was empty).  But this was not always portable; at least NetBSD
address@hidden built before 2008 would fail with a diagnostic.
 
 A file might not be removed even if its parent directory is writable
 and searchable.  Many Posix hosts cannot remove a mount point, a named


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