Avoid saving any macros starting with a _, since that can create

trouble if header files are included in some "impropper" order.
It's much better if the application programmer has to specify on his
or her own if _REENTRANT shall be defined and when.

diff --git a/Configure b/Configure
index 38fb9e901f801f678c00c0fbbec625b3a8662744..cfa06fab59b7cdb1d955a44f5eb21a7af2171231 100755 (executable)
--- a/Configure
+++ b/Configure
@@ -557,7 +557,7 @@ else
        my $def;
        foreach $def (split ' ',$thread_cflag)
                {
-               if ($def =~ s/^-D//)
+               if ($def =~ s/^-D// && $def !~ /^_/)
                        {
                        $thread_defines .= "#define $def\n";
                        }