Makefile tuning

makefile

@@ -10,8 +10,10 @@ SIZE = 		${CROSS}-size
 TARGET = bin.elf
 
 # QEMU command and flags
-QEMU = qemu-riscv64-static
-QEMU_FLAGS =
+# QEMU = qemu-riscv64-static
+QEMU = qemu-system-riscv64
+QEMU_FLAGS += --machine virt#	# Use the virt machine
+QEMU_FLAGS += --nographic#		# No graphical output
 
 # Flags for compiler and assembler
 CFLAGS += -static#				# Use static linking
@@ -23,6 +25,13 @@ CFLAGS += -march=rv64i			# Use RV64I ISA, i.e., integer only
 CFLAGS += -mabi=lp64			# Use LP64 ABI, i.e., 64-bit longs and pointers, 32-bit ints
 CFLAGS += -Os#					# Optimize for size
 
+LDFLAGS += -T link.ld			# Use the linker script
+LDFLAGS += --no-dynamic-linker
+LDFLAGS += -m elf64lriscv
+LDFLAGS += -static
+LDFLAGS += -nostdlib
+LDFLAGS += -s
+
 # Use GC=0 to disable garbage collection
 ifneq ($(GC), 0)
 	CFLAGS += -ffreestanding
@@ -43,7 +52,7 @@ OBJS := $(AS_SRCS:.s=.o)
 
 # Default target
 all: $(OBJS)
-	@$(CC) $(CFLAGS) -o $(TARGET) $(OBJS) 
+	@$(LD) $(LDFLAGS) -o $(TARGET) $(OBJS)
 	@echo "LD $(OBJS)"
 
 # Compile assembly sources
@@ -53,7 +62,8 @@ all: $(OBJS)
 
 # Run the binary in QEMU
 run: all	
-	$(QEMU) $(QEMU_FLAGS) ./$(TARGET)
+	@echo "To exit: Ctrl+A, X"
+	@$(QEMU) $(QEMU_FLAGS) -bios $(TARGET)
 
 # View the text section of the binary
 inspect: all