Don't complain about uninitialized values when running Configure

If a system understands `uname -X` then the Configure script will attempt
to use uninitialized values.

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/13327)

diff --git a/util/perl/OpenSSL/config.pm b/util/perl/OpenSSL/config.pm
index c2dbd33bd1319acc680fecd18b2c8316baca8833..e494ddd969eba7635515afce3dd4fb97bec0e423 100755 (executable)
--- a/util/perl/OpenSSL/config.pm
+++ b/util/perl/OpenSSL/config.pm
@@ -202,8 +202,8 @@ sub is_sco_uname {
     }
     close UNAME;
     return "" if $line eq '';
-    my @fields = split($line);
-    return $fields[2];
+    my @fields = split(/\s+/, $line);
+    return $fields[2] // '';
 }
 
 sub get_sco_type {