12313 nightly should check for ld guidance

@@ -189,11 +189,11 @@
         /bin/time $MAKE -e install 2>&1 | \
             tee -a $SRC/${INSTALLOG}.out >> $LOGFILE
 
         echo "\n==== Build errors ($LABEL) ====\n" >> $mail_msg_file
         egrep ":" $SRC/${INSTALLOG}.out |
-            egrep -e "(^${MAKE}:|[      ]error[:        \n])" | \
+            egrep -e "(^${MAKE}:|[      ]error[:        \n]|ld: guidance:)" | \
             egrep -v "Ignoring unknown host" | \
             egrep -v "cc .* -o error " | \
             egrep -v "warning" | tee $TMPDIR/build_errs${SUFFIX} \
             >> $mail_msg_file
             sed -n "/^Undefined[        ]*first referenced$/,/^ld: fatal:/p" \