Changed behavior of the "lvs" script so that the setup file can

be specified as "nosetup" if the "lvs" command is being called
interactively from a terminal or as part of a larger script where
setup commands have been issued prior to running the "lvs" script.
Similarly, the log file can be specified as "nolog" to prevent any
log file from being generated.

tcltk/netgen.tcl.in

@@ -475,15 +475,22 @@ proc netgen::lvs { name1 name2 {setupfile setup.tcl} {logfile comp.out} args} {
       if {$perrors > 0} {
 	 puts stdout "Warning:  There were errors reading the setup file"
       }
-   } else {
+   } elseif {[string first nosetup $setupfile] < 0} {
       netgen::permute default	;# transistors and resistors
       netgen::property default
    }
 
-   puts stdout "Comparison output logged to file $logfile"
-   netgen::log file $logfile
-   netgen::log start
-   netgen::log echo off
+   if {[string first nolog $logfile] < 0} {
+      puts stdout "Comparison output logged to file $logfile"
+      netgen::log file $logfile
+
+      netgen::log start
+      netgen::log echo off
+      set dolog true
+   } else {
+      set dolog false
+   }
+
    if {$dolist == 1} {
       set endval [netgen::compare -list hierarchical "$fnum1 $cell1" "$fnum2 $cell2"]
    } else {
@@ -566,7 +573,9 @@ proc netgen::lvs { name1 name2 {setupfile setup.tcl} {logfile comp.out} args} {
    if {$properr != {}} {
       netgen::log put "The following cells had property errors: $properr\n"
    }
-   netgen::log end
+   if {$dolog} {
+      netgen::log end
+   }
    puts stdout "LVS Done."
    if {$dojson == 1} {
       netgen::convert_to_json $logfile $lvs_final