-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 KeyboardMouseMultiReport clean
- $(MAKE) -C KeyboardMouseMultiReport all
-
- $(MAKE) -C MassStorage clean
- $(MAKE) -C MassStorage all
-
- $(MAKE) -C MassStorageKeyboard clean
- $(MAKE) -C MassStorageKeyboard 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 VirtualSerialMouse clean
- $(MAKE) -C VirtualSerialMouse all
-
- $(MAKE) -C VirtualSerialMassStorage clean
- $(MAKE) -C VirtualSerialMassStorage all
-
-%:
- $(MAKE) -C AudioInput $@
- $(MAKE) -C AudioOutput $@
- $(MAKE) -C DualVirtualSerial $@
- $(MAKE) -C GenericHID $@
- $(MAKE) -C Joystick $@
- $(MAKE) -C Keyboard $@
- $(MAKE) -C KeyboardMouse $@
- $(MAKE) -C KeyboardMouseMultiReport $@
- $(MAKE) -C MassStorage $@
- $(MAKE) -C MassStorageKeyboard $@
- $(MAKE) -C MIDI $@
- $(MAKE) -C Mouse $@
- $(MAKE) -C RNDISEthernet $@
- $(MAKE) -C VirtualSerial $@
- $(MAKE) -C VirtualSerialMouse $@
- $(MAKE) -C VirtualSerialMassStorage $@
-
+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)
+ $(error EMERGENCY ABORT: INFINITE RECURSION DETECTED)
+endif
+
+# Need to special-case building without a per-project object directory
+ifeq ($(OBJDIR),)
+ # If no target specified, force "clean all" and disallow parallel build
+ ifeq ($(MAKECMDGOALS),)
+ MAKECMDGOALS := clean all
+ .NOTPARALLEL:
+ endif
+
+ # If one of the targets is to build, force "clean" beforehand and disallow parallel build
+ ifneq ($(findstring all, $(MAKECMDGOALS)),)
+ MAKECMDGOALS := clean $(MAKECMDGOALS)
+ .NOTPARALLEL:
+ endif
+endif
+
+%: $(PROJECT_DIRECTORIES)
+ @echo . > /dev/null
+
+$(PROJECT_DIRECTORIES):
+ @$(MAKE) -C $@ $(MAKECMDGOALS)
+
+.PHONY: $(PROJECT_DIRECTORIES)