Slightly better method of recursive make - use proper make dependencies to allow...

[pub/USBasp.git] / Demos / Device / LowLevel / makefile

diff --git a/Demos/Device/LowLevel/makefile b/Demos/Device/LowLevel/makefile
index cdac3a8..3a5615e 100644 (file)
--- a/Demos/Device/LowLevel/makefile
+++ b/Demos/Device/LowLevel/makefile
@@ -1,6 +1,6 @@
 #
 #             LUFA Library
-#     Copyright (C) Dean Camera, 2010.
+#     Copyright (C) Dean Camera, 2012.
 #
 #  dean [at] fourwalledcubicle [dot] com
 #           www.lufa-lib.org
@@ -13,54 +13,32 @@
 # custom LUFA library build options are reflected in the compiled
 # code.
 
-all:
-       $(MAKE) -C AudioInput clean
-       $(MAKE) -C AudioInput all
-
-       $(MAKE) -C AudioOutput clean
-       $(MAKE) -C AudioOutput all
-
-       $(MAKE) -C DualVirtualSerial clean
-       $(MAKE) -C DualVirtualSerial all
-
-       $(MAKE) -C GenericHID clean
-       $(MAKE) -C GenericHID all
-
-       $(MAKE) -C Joystick clean
-       $(MAKE) -C Joystick all
-
-       $(MAKE) -C Keyboard clean
-       $(MAKE) -C Keyboard all
-
-       $(MAKE) -C KeyboardMouse clean
-       $(MAKE) -C KeyboardMouse all
-
-       $(MAKE) -C MassStorage clean
-       $(MAKE) -C MassStorage all
-
-       $(MAKE) -C MIDI clean
-       $(MAKE) -C MIDI all
-
-       $(MAKE) -C Mouse clean
-       $(MAKE) -C Mouse all
-
-       $(MAKE) -C RNDISEthernet clean
-       $(MAKE) -C RNDISEthernet all
-
-       $(MAKE) -C VirtualSerial clean
-       $(MAKE) -C VirtualSerial all
-
-%:
-       $(MAKE) -C AudioInput $@
-       $(MAKE) -C AudioOutput $@
-       $(MAKE) -C DualVirtualSerial $@
-       $(MAKE) -C GenericHID $@
-       $(MAKE) -C Joystick $@
-       $(MAKE) -C Keyboard $@
-       $(MAKE) -C KeyboardMouse $@
-       $(MAKE) -C MassStorage $@
-       $(MAKE) -C MIDI $@
-       $(MAKE) -C Mouse $@
-       $(MAKE) -C RNDISEthernet $@
-       $(MAKE) -C VirtualSerial $@
-
+PROJECT_DIRECTORIES = $(shell ls -d */)
+
+# This makefile is potentially infinitely recursive if something really bad
+# happens when determining the set of project directories - hard-abort if
+# more than 10 levels deep to avoid angry emails.
+ifeq ($(MAKELEVEL), 10)
+   $(error EMERGENCY ABORT: INFINITE RECURSION DETECTED)
+endif
+
+# If building without a per-project object directory, we can't build in parallel
+ifeq ($(OBJDIR),)
+   .NOTPARALLEL:
+
+   # Ensure projects are pre-cleaned if the target is the default or "all"
+   ifeq ($(MAKECMDGOALS),)
+      MAKECMDGOALS := clean all
+   endif
+   ifneq ($(findstring all, $(MAKECMDGOALS)),)
+      MAKECMDGOALS := clean $(MAKECMDGOALS)
+   endif
+endif
+
+%: $(PROJECT_DIRECTORIES)
+       @echo . > /dev/null
+
+$(PROJECT_DIRECTORIES):
+       @$(MAKE) -C $@ $(MAKECMDGOALS)
+    
+.PHONY: $(PROJECT_DIRECTORIES)