"mktemp" is a BSD-ism and there are others around....

[Bruce Korb]

The other variation on "mktemp" uses "illegal option"
(you get arrested if you use one).  BTW, if the "mktemp -d -q"
is successful in creating a file, shouldn't you remove the
file before trying another method?

$ cvs diff -u ./lib/Autom4te/General.pm
Index: ./lib/Autom4te/General.pm
===================================================================
RCS file: /cvsroot/autoconf/autoconf/lib/Autom4te/General.pm,v
retrieving revision 1.34
diff -u -r1.34 General.pm
--- ./lib/Autom4te/General.pm   14 May 2005 07:00:39 -0000      1.34
+++ ./lib/Autom4te/General.pm   30 Oct 2005 17:46:34 -0000
@@ -310,10 +310,16 @@
   my ($signature) = @_;
   my $TMPDIR = $ENV{'TMPDIR'} || '/tmp';

-  # If mktemp supports dirs, use it.
-  $tmp = `(umask 077 &&
-          mktemp -d -q "$TMPDIR/${signature}XXXXXX") 2>/dev/null`;
+  $tmp = `(mktemp -@ 2>&1) | grep 'invalid option'`;
   chomp $tmp;
+
+  if ($tmp)
+    {
+      # If mktemp supports dirs, use it.
+      $tmp = `(umask 077 &&
+          mktemp -d -q "$TMPDIR/${signature}XXXXXX") 2>/dev/null`;
+      chomp $tmp;
+    }

   if (!$tmp || ! -d $tmp)
     {