Send all installperl messages to STDERR and be -w clean.

Subject: [PATCH] Re: [ID 20000721.003] installperl stderr/stdout problem
Message-Id: <E13Fyux-0003Q2-00@libra.cus.cam.ac.uk>

p4raw-id: //depot/perl@6421

diff --git a/installperl b/installperl
index 09ffc80..f296712 100755 (executable)
--- a/installperl
+++ b/installperl
@@ -307,7 +307,7 @@ if (! $versiononly && ! samepath($installbin, '.') && ($^O ne 'dos') && ! $Is_VM
 
 my $mainperl_is_instperl = 0;
 
-if ($Config{installusrbinperl} eq 'define' &&
+if ($Config{installusrbinperl} && $Config{installusrbinperl} eq 'define' &&
     !$versiononly && !$nonono && !$Is_W32 && !$Is_VMS && -t STDIN && -t STDERR
        && -w $mainperldir && ! samepath($mainperldir, $installbin)) {
     my($usrbinperl)    = "$mainperldir/$perl$exe_ext";
@@ -465,7 +465,7 @@ sub yn {
     my($prompt) = @_;
     my($answer);
     my($default) = $prompt =~ m/\[([yn])\]\s*$/i;
-    print $prompt;
+    print STDERR $prompt;
     chop($answer = <STDIN>);
     $answer = $default if $answer =~ m/^\s*$/;
     ($answer =~ m/^[yY]/);