Improved the "version" command to show compilation switches. Updated

documentation to reflect changes.

doc/ngspice.texi

@@ -6239,15 +6239,46 @@ Clear the value of the specified variable(s) (word).
  General Form:
 
 @example
-     version [version id]
+     version [-s | -f | <version id>]
 @end example
 
 
-Print out the version of nutmeg that is running.  If there are
+Print out the version of @emph{nutmeg} that is running, if invoked without argument
-arguments, it checks to make sure that the arguments match the current
+or with @code{-s} or @code{-f}. If the argument is a  @code{<version id>} (any string different
-version of NGSPICE.  (This is mainly used as a Command: line in rawfiles.)
+from  @code{-s} or @code{-f} is considered a  @code{<version id>} ), the command checks to make
+sure that the arguments match the current version of NGSPICE.  
+(This is mainly used as a @code{Command:} line in rawfiles.)
 
 
+@emph{Options description}
+@itemize @bullet
+@item No option: The output of the command is the message you can see when running NGSPICE 
+                 from the command line, no more no less.
+@item @code{-s}(hort):  A shorter version of the message you see when calling NGSPICE from the 
+                       command line. 
+@item @code{-f}(ull):   You may want to use this option if you want to know what extensions
+                        are included into the simulator and what compilation switches are
+			active. A list of compilation options and included extensions is
+	                appended to the normal (not short) message. May be useful when sending 
+	                bug reports.  
+@end itemize
+
+The following example shows what the command returns is some situations:
+
+@example
+ngspice 10 -> version
+******
+** ngspice-15 : Circuit level simulation program
+** The U. C. Berkeley CAD Group
+** Copyright 1985-1994, Regents of the University of California.
+** Please submit bug-reports to: ngspice-devel@@lists.sourceforge.net
+** Creation Date: Sun Aug 24 00:35:57 CEST 2003
+******
+ngspice 11 -> version 14 
+Note: rawfile is version 14 (current version is 15)
+ngspice 12 -> version 15
+ngspice 13 -> 
+@end example
 
 @node  Where, Write, Version, Commands
 @subsection  Where:  Identify troublesome node or device

src/frontend/misccoms.c

@@ -156,7 +156,7 @@ com_version(wordlist *wl)
 
     } else {
         s = wl_flatten(wl);
-	if (!strncmp(s, "-s", 2)) {
+	if (!strncmp(s, "-s", 2) || !strncmp(s, "-S", 2) ) {
 	    fprintf(cp_out, "******\n");
 	    fprintf(cp_out, "** %s-%s\n", ft_sim->simulator,
 		    ft_sim->version);
@@ -165,6 +165,63 @@ com_version(wordlist *wl)
 	    if (Spice_Build_Date && *Spice_Build_Date)
 		fprintf(cp_out, "** Creation Date: %s\n", Spice_Build_Date);
 	    fprintf(cp_out, "******\n");
+	} else if (!strncmp(s, "-f", 2) || !strncmp(s, "-F", 2) )  { 
+	
+	    fprintf(cp_out, "******\n");
+
+	    fprintf(cp_out, "** %s-%s : %s\n", ft_sim->simulator,
+		    ft_sim->version, ft_sim->description);
+	    fprintf(cp_out, "** The U. C. Berkeley CAD Group\n");
+	    fprintf(cp_out,
+	            "** Copyright 1985-1994, Regents of the University of California.\n");
+	    if (Spice_Notice && *Spice_Notice)
+	        fprintf(cp_out, "** %s\n", Spice_Notice);
+	    if (Spice_Build_Date && *Spice_Build_Date)
+	        fprintf(cp_out, "** Creation Date: %s\n", Spice_Build_Date);
+            fprintf(cp_out,"**\n");
+#ifdef CIDER
+            fprintf(cp_out,"** CIDER 1.b1 (CODECS simulator) included\n");	    
+#endif	    
+#ifdef XSPICE
+            fprintf(cp_out,"** XSPICE extensions included\n");
+#endif
+            fprintf(cp_out,"** Relevant compilation options (refer to user's manual):\n");
+#ifdef NOBYPASS
+            fprintf(cp_out,"** --enable-nobypass\n");
+#endif   
+#ifdef CAPBYPASS
+            fprintf(cp_out,"** --enable-capbypass\n");
+#endif	    
+#ifdef CAPZEROBYPASS
+            fprintf(cp_out,"** --enable-capzerobypass\n");
+#endif
+#ifdef NODELIMITING
+            fprintf(cp_out,"** --enable-nodelimiting\n");
+#endif
+#ifdef PREDICTOR
+            fprintf(cp_out,"** --enable-predictor\n");
+#endif
+#ifdef NEWTRUNC
+            fprintf(cp_out,"** --enable-newtrunc\n");
+#endif
+#ifdef NOSQRT
+            fprintf(cp_out,"** --enable-nosqrt\n");
+#endif
+#ifdef INT_NOISE
+            fprintf(cp_out,"** --enable-intnoise\n");
+#endif
+#ifdef WANT_SENSE2
+            fprintf(cp_out,"** --enable-sense2\n");
+#endif
+            fprintf(cp_out,"**\n");
+#ifdef EXPERIMENTAL_CODE
+            fprintf(cp_out,"** Experimental code enabled.\n");
+#endif
+#ifdef EXP_DEV
+            fprintf(cp_out,"** Experimental devices enabled.\n");
+#endif	    	    	    
+	    fprintf(cp_out, "******\n");
+	
 	} else if (!eq(ft_sim->version, s)) {
             fprintf(stderr,
         "Note: rawfile is version %s (current version is %s)\n",