Modify makefile to allow building with custom .o files

Makefile

 .PHONY: reset_%
+.SECONDARY: $(bin/*.axf)
 
 #### Setup ####
 XMC       = $(shell pwd)/XMC
@@ -16,16 +17,15 @@ LIBS      = $(CMSIS)/Lib/GCC/libarm_cortexM4lf_math.a
 LINKER_FILE = $(CMSIS)/Infineon/$(UC)_series/Source/GCC/XMC4500x1024.ld
 CMSIS_SRC += $(CMSIS)/Infineon/$(UC)_series/Source/System_$(UC).c
 
-JLINK = JLinkExe
 SYSCC = $(TOOLCHAIN)-gcc
 CC    = patmos-clang
 CP    = $(TOOLCHAIN)-objcopy
 OD    = $(TOOLCHAIN)-objdump
 GDB   = $(TOOLCHAIN)-gdb
 
-#STACK_SIZE?=2048
 STACK_SIZE?=16384
 
+JLINK = JLinkExe
 JLFLAGS = -device XMC4500-1024 -if SWD -speed 900
 
 CFLAGS = -target armv6m--none-eabi -mcpu=cortex-m4 -mthumb -integrated-as -ccc-gcc-name arm-none-eabi-gcc
@@ -60,7 +60,7 @@ OBJS += src/System_$(UC).o
 OBJS_MAIN = $(OBJS) $(SRC_MAIN:.c=.o)
 
 #### Rules ####
-all: $(OBJS) bin/xmc.bin
+all: $(OBJS)
 
 src/System_$(UC).o: $(CMSIS_SRC)
 	$(CC) -c $(CFLAGS) $< -o $@
@@ -88,10 +88,10 @@ bin/ids_%.axf: $(OBJS) bin/startup_XMC4500.o bin/ids_%.o
 %.bin: %.axf
 	$(CP) $(CPFLAGS) $^ $@
 
-bin/xmc.axf: $(OBJS_MAIN) bin/startup_XMC4500.o gene.o
+bin/system_%.axf: $(OBJS_MAIN) bin/startup_XMC4500.o %.o
 	mkdir -p bin
-	@echo LD $<
-	@$(CC) -T $(LINKER_FILE) $(LFLAGS) -o bin/xmc.axf $^ $(LIBS)
+	@echo LD $@
+	@$(CC) -T $(LINKER_FILE) $(LFLAGS) -o $@ $^ $(LIBS)
 
 reset_%:
 	echo "connect\n\