making hello-world run on all Boards

env/common-gcc.mk

@@ -6,15 +6,16 @@ TL_TARGET?=all
 .PHONY: $(TL_TARGET)
 $(TL_TARGET): $(TARGET)
 
+ENV_DIR:=$(dir $(lastword $(MAKEFILE_LIST)))
+BSP_BASE=$(ENV_DIR)/..
+PLATFORM_DIR = $(ENV_DIR)/$(BOARD)
+
 include $(BSP_BASE)/libwrap/libwrap.mk
 
 BOARD?=iss
-ENV_DIR = $(BSP_BASE)/env
-PLATFORM_DIR = $(ENV_DIR)/$(BOARD)
 
-ASM_SRCS += $(ENV_DIR)/start.S
-ASM_SRCS += $(ENV_DIR)/entry.S
-C_SRCS += $(PLATFORM_DIR)/init.c
+ASM_SRCS += $(ENV_DIR)/start.S $(ENV_DIR)/entry.S
+C_SRCS   += $(PLATFORM_DIR)/init.c
 
 LINKER_SCRIPT ?= $(PLATFORM_DIR)/$(LINK_TARGET).lds
 
@@ -26,7 +27,13 @@ INCLUDES += -I$(PLATFORM_DIR)
 LDFLAGS += -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI)
 LDFLAGS += -L$(ENV_DIR)
 LD_SCRIPT += -T $(LINKER_SCRIPT) -Wl,--no-warn-rwx-segments -Wl,-Map=$(TARGET).map  -nostartfiles 
-# --specs=nano.specs
+
+ifneq (,$(findstring specs=nano.specs,$(LDFLAGS), LD_SCRIPT))
+    # Found
+else
+    # Not found
+endif
+
 
 ASM_OBJS := $(ASM_SRCS:.S=.o)
 C_OBJS   := $(C_SRCS:.c=.o)
@@ -56,8 +63,9 @@ OBJDUMP := $(TOOL_DIR)$(TRIPLET)-objdump
 OBJCOPY := $(TOOL_DIR)$(TRIPLET)-objcopy
 
 ifndef NO_DEFAULT_LINK
-$(TARGET).elf: $(LINK_OBJS) $(LINK_DEPS)
-	$(LD) $(LINK_OBJS) $(LDFLAGS) $(LIBWRAP) $(LD_SCRIPT) -o $@
+$(TARGET): $(LINK_OBJS) $(LINK_DEPS)
+	echo LINK_OBJS: $(LINK_OBJS)
+	$(LD) $(LINK_OBJS) $(LDFLAGS) $(LIBWRAP_LDFLAGS) $(LIBWRAP) $(LD_SCRIPT) -o $@
 	$(OBJDUMP) -d -S $@ > $(TARGET).dis
 endif