Makefile - Rework build system a bit

Makeconf

@@ -1,12 +1,25 @@
-modules := memory/device \
-           memory/bus \
-           memory/ram \
-           memory/bootrom_overlay \
-           memory/register \
-		   memory/bank \
-           memory/mbc/mbc1 \
-           cpu/cpu \
-           cpu/decoder \
-           cartridge/cartridge
+TARGETS := libemu.a vgbc vgbc.test vgbc.inspect
+
+cmd_libemu.a = ar -rc $@ $^
+verb_libemu.a = pack
+modules_libemu.a := memory/device.o \
+                    memory/bus.o \
+                    memory/ram.o \
+                    memory/bootrom_overlay.o \
+                    memory/register.o \
+                    memory/bank.o \
+                    memory/mbc/mbc1.o \
+                    cpu/cpu.o \
+                    cpu/decoder.o \
+                    cartridge/cartridge.o
+
+modules_vgbc := main.o libemu.a
+verb_vgbc := link
+
+modules_vgbc.test := $(patsubst %.cpp,%.o,$(wildcard tests/*.cpp)) libemu.a
+verb_vgbc.test := link
+
+modules_vgbc.inspect := cartridge/inspector.o libemu.a
+verb_vgbc.inspect := link
 
 CXX_FLAGS := -I $(CURDIR)