depend.awk: Allow sort suppression from the command line. Idea from Pat.

sys/unix/depend.awk

@@ -11,7 +11,6 @@
 #     cd .. ; sh sys/unix/setup.sh [sys/unix/hints/FOO] )
 # newer usage:
 #   cd sys/unix ; make -f Makefile.src updatedepend
-
 #
 # This awk program scans each file in sequence, looking for lines beginning
 # with `#include "' and recording the name inside the quotes.  For .h files,
@@ -19,6 +18,10 @@
 # corresponding .o file; dependencies in nested header files are propagated
 # to the .o target.
 #
+# Variables that can be set on the command line:
+#  -v dontsortdeps=1               do not sort the dependencies
+#  -v dontsortfules=1              do not sort the rules
+#
 # config.h and hack.h get special handling because of their heavy use;
 #	timestamps for them allow make to avoid rechecking dates on
 #	subsidiary headers for every source file;
@@ -34,8 +37,6 @@
 # zlib.h ditto
 #
 BEGIN		{ FS = "\""			#for `#include "X"', $2 is X
-		  dosort = 1
-		  dorulesort = 1
 		  special[++sp_cnt] = "../include/config.h"
 		  special[++sp_cnt] = "../include/hack.h"
 		  alt_deps["../include/extern.h"] = ""
@@ -91,7 +92,7 @@ END		{
 #
 
 function output_dep(){
-  if(dorulesort){
+  if(!dontsortrules){
     worklist[++worklistctr] = file
   } else {
     output_final2()
@@ -100,7 +101,7 @@ function output_dep(){
 
 function output_final(				x)
 {
-  if(dorulesort){
+  if(!dontsortrules){
     nhsort(worklist, 1, worklistctr, 1)
     for(x=1;x<=worklistctr;x++){
       file = worklist[x]
@@ -173,7 +174,7 @@ function format_dep(target, source,		col, n, i, list, prefix, moc)
   #files duplicate the target as next element but we need to skip that too
   first = moc ? 3 : 2
   source = list[first]
-  if (dosort){
+  if (!dontsortdeps){
     nhsort(list, first, n, 0)
   }
   for (i = first; i <= n; i++) {