wmakeCollect: Support simultaneous builds of different target architectures or compilers

wmake/wmake

@@ -349,10 +349,11 @@ if [ "$all" = "queue" ]
 then
     (                                                 \
         wmakeLnIncludeAll -j$WM_NCOMPPROCS            \
-     && WM_ID=$(stat --format=%d.%i $PWD)         \
+     && WM_ID=${PWD////_}.$WM_OPTIONS                 \
         WM_SCHEDULER=$scheduler                       \
         trap '$scheduler -kill' TERM INT;             \
-        wmake -all objects                        \
+        $scheduler -clean                             \
+     && wmake -all objects                            \
      && $scheduler                                    \
     ) && wmake -all
     exit $?

wmake/wmakeCollect

@@ -42,7 +42,8 @@ usage() {
 Usage: $Script [OPTION] <command>
 
 options:
-  -kill             Removes temporary makefiles
+  -clean            Clean-up before compilation (removes old makefiles)
+  -kill             Clean-up after termination (removes makefiles)
   -h | -help        Print the usage
 
 Collecting scheduler for fast parallel compilation of large numbers of object
@@ -76,7 +77,7 @@ do
     -h | -help)
         usage
         ;;
-    -kill)
+    -kill | -clean)
         cleanup="true"
         shift
         ;;