adds ehrenberg platform

env/common-gcc.mk

@@ -1,8 +1,10 @@
 ifndef _MK_COMMON
 _MK_COMMON := # defined
 
-.PHONY: all
-all: $(TARGET)
+TL_TARGET?=all
+
+.PHONY: $(TL_TARGET)
+$(TL_TARGET): $(TARGET)
 
 include $(BSP_BASE)/libwrap/libwrap.mk
 
@@ -14,17 +16,17 @@ ASM_SRCS += $(ENV_DIR)/start.S
 ASM_SRCS += $(ENV_DIR)/entry.S
 C_SRCS += $(PLATFORM_DIR)/init.c
 
-LINKER_SCRIPT := $(PLATFORM_DIR)/$(LINK_TARGET).lds
+LINKER_SCRIPT ?= $(PLATFORM_DIR)/$(LINK_TARGET).lds
 
 INCLUDES += -I$(BSP_BASE)/include
 INCLUDES += -I$(BSP_BASE)/drivers/
 INCLUDES += -I$(ENV_DIR)
 INCLUDES += -I$(PLATFORM_DIR)
 
-TOOL_DIR ?= $(BSP_BASE)/../toolchain/bin/
-
 LDFLAGS += -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI)
+ifndef NO_DEFAULT_LINK
 LDFLAGS += -T $(LINKER_SCRIPT) -Wl,--no-warn-rwx-segments -Wl,-Map=$(TARGET).map  -nostartfiles 
+endif
 LDFLAGS += -L$(ENV_DIR)
 # --specs=nano.specs
 
@@ -53,12 +55,14 @@ CC=$(TOOL_DIR)$(TRIPLET)-gcc
 LD=$(TOOL_DIR)$(TRIPLET)-gcc
 AR=$(TOOL_DIR)$(TRIPLET)-ar
 OBJDUMP := $(TOOL_DIR)$(TRIPLET)-objdump
+OBJCOPY := $(TOOL_DIR)$(TRIPLET)-objcopy
 
-
-$(TARGET): $(LINK_OBJS) $(LINK_DEPS)
+ifndef NO_DEFAULT_LINK
+$(TARGET).elf: $(LINK_OBJS) $(LINK_DEPS)
 	$(LD) $(LINK_OBJS) $(LDFLAGS) $(LIBWRAP) -o $@
-	$(OBJDUMP) -d -S $(TARGET) > $(TARGET).dis
-	
+	$(OBJDUMP) -d -S $@ > $(TARGET).dis
+endif
+
 $(ASM_OBJS): %.o: %.S $(HEADERS)
 	$(CC) $(CFLAGS) $(INCLUDES) -c -o $@ $<