Add enums and some cleanup (#148)

* support enums

* better compiler warnings

* tweaks to build with clang

goal_src/kernel/gkernel-h.gc

@@ -54,8 +54,38 @@
 ;; ENUMS
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
-; todo, processs mask
+; bitfield enum to indicate proprties about a process-tree
+(defenum process-mask :bitfield #t :type int32
+  (execute         0) ; 1
+  (draw            1) ; 2
+  (pause           2) ; 4
+  (menu            3) ; 8
+  (progress        4) ; 16
+  (actor-pause     5) ; 32
+  (sleep           6) ; 64
+  (sleep-code      7) ; 128
+  (process-tree    8) ; 256       ; not an actual process, just a "tree node" for organization
+  (heap-shrunk     9) ; 512
+  (going          10) ; 1024
+  (movie          11) ; 2048
+  (movie-subject  12) ; 4096
+  (target         13) ; 8192
+  (sidekick       14) ; 16384
+  (crate          15) ; 32768
+  (collectable    16) ; 65536
+  (enemy          17) ; 131072
+  (camera         18) ; 262144
+  (platform       19) ; 524288
+  (ambient        20) ; 1048576
+  (entity         21) ; 2097152
+  (projectile     22) ; 4194304
+  (attackable     23) ; 8388608
+  (death          24) ; 16777216
+  )
 
+;; -961
+(defconstant PROCESS_CLEAR_MASK
+  (lognot (process-mask sleep sleep-code process-tree heap-shrunk)))
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; MACROS