用于OpenRISC的Makefile示例

用于开源处理器OpenRISC精简版AltOR32的软件开发，使用的工具链为or1k-elf-gcc，Makefile和连接脚本为：

 #***********************************************************************************************
 #    File        : Makefile
 #    Author        : Lyu Yang
 #    Date          :
 #    Description : Makefile for OpenRISC
 #***********************************************************************************************

 TARGET = main

 CROSS_COMPILE = or1k-elf-

 INCLUDE_DIRS = -I ./
 LIBRARY_DIRS = -L ./

 CC = $(CROSS_COMPILE)gcc
 CFLAGS =  $(INCLUDE_DIRS) -mno-delay -c -msoft-div -msoft-float -msoft-mul -mno-ror -mno-cmov -mno-sext -Os

 CXX = $(CROSS_COMPILE)g++
 CXXFLAGS =  $(INCLUDE_DIRS) -c -mno-delay -msoft-float -msoft-mul -mno-ror -mno-cmov -mno-sext -Os

 AS = $(CROSS_COMPILE)as
 ASFLAGS = -c

 LD = $(CROSS_COMPILE)ld
 LDFLAGS = $(LIBRARY_DIRS) -T./openrisc.lds -Map $(TARGET).map -nostartfiles -nodefaultlibs -nostdlib

 OBJCP = $(CROSS_COMPILE)objcopy
 OBJCPFLAGS = -O binary -j .text -j .rodata -j .data -j .bss

 AR = $(CROSS_COMPILE)ar
 ARFLAGS = cr

 DUMP = $(CROSS_COMPILE)objdump
 DUMPFLAG = --disassemble --syms --all-header

 SIZE = $(CROSS_COMPILE)size

 # Static library files
 OBJS_LIB +=

 # User should list all object files
 OBJS += $(patsubst %.S, %.o, $(wildcard *.S))
 OBJS += $(patsubst %.c, %.o, $(wildcard *.c))

 # Make
 .PHONY: all clean debug
 all: $(TARGET).elf $(TARGET).bin $(TARGET).asm $(TARGET).mif
     $(SIZE) $(TARGET).elf

 %.o: %.S
     $(AS) $(ASFLAGS) $^ -o $@

 %.o: %.c
     $(CC) $(CFLAGS) $^ -o $@

 $(TARGET).elf: $(OBJS)
     $(LD) $(LDFLAGS) $(OBJS_LIB) -o $@ $^

 $(TARGET).asm: $(TARGET).elf
     $(DUMP) $(DUMPFLAG) $(TARGET).elf > $(TARGET).asm

 $(TARGET).bin: $(TARGET).elf
     $(OBJCP) $(OBJCPFLAGS) $< $@

 $(TARGET).mif: $(TARGET).bin
     ./bin2fpga/bin2fpga  $<

 clean:
     rm -rf *.o *.asm *.elf *.bin *.mif *.map *.coe data.txt

 debug:
     $(CROSS_COMPILE)gdb $(TARGET).elf -x gdbinit.txt

 /* Linker script for OpenRISC */

 OUTPUT_FORMAT("elf32-or1k")
 OUTPUT_ARCH(or1k)
 ENTRY(_reset)

 MEMORY
 {
     RAM (rwx) : ORIGIN = 0x0, LENGTH = 0x4000
     DRAM (rwx) : ORIGIN = 0x10000000, LENGTH = 0x10000000
 }

 SECTIONS
 {
     .text :
     {
         _stext = .;
         stext = .;
         *(.text)
         *(.text.*)
         . = ALIGN();
         _etext = .;
         etext = .;
     } > RAM

     .rodata :
     {
         _sdata = .;
         sdata = .;
         . = ALIGN();
         *(.rodata)
         *(.rodata.*)
     } > RAM

     .data :
     {
         *(.sdata)
         *(.data)
         *(.rwdata)
         *(.got.plt) *(.got)
         *(.shdata)
         *(.data.* .gnu.linkonce.d.*)
         . = ALIGN ();
         _edata  =  .;
         edata  =  .;
     } > RAM

     .bss :
     {
         . = ALIGN();
         __bss_start = .;
         *(.sbss .sbss.*)
         *(.bss .bss.*)
         *(COMMON)
         . = ALIGN ();
         __bss_end = .;
     } > RAM
 }

 /* Stack base address */
 __stack_pointer = 0x4000;