hello_world/Makefile

   1 ARCH = $(shell uname -m)
   2 ifneq ("$(ARCH)", "ppc64")
   3 ifneq ("$(ARCH)", "ppc64le")
   4         CROSS_COMPILE ?= powerpc64le-linux-gnu-
   5 endif
   6 endif
   7
   8 #BOOT_INIT_BASE ?= 0xf0000000 # at QSPI address
   9 BOOT_INIT_BASE ?= 0x00600000 # inside DRAM address space
  10 # BOOT_INIT_BASE ?= 0xff000000   # at ROM hi address (with coldboot firmware)
  11 # BOOT_INIT_BASE ?= 0x0        # start at zero (usual)
  12
  13 CC = $(CROSS_COMPILE)gcc
  14 LD = $(CROSS_COMPILE)ld
  15 OBJCOPY = $(CROSS_COMPILE)objcopy
  16
  17 CFLAGS = -Os -g -Wall -std=c99 -mabi=elfv2 -msoft-float -mno-string \
  18                 -mno-multiple -mno-vsx -mno-altivec -mlittle-endian \
  19                 -fno-stack-protector -mstrict-align -ffreestanding \
  20                 -fdata-sections -ffunction-sections -I../include \
  21             -DBOOT_INIT_BASE=$(BOOT_INIT_BASE)
  22
  23 ASFLAGS = $(CFLAGS)
  24 LDFLAGS = -static -nostdlib -T powerpc.lds --gc-sections
  25
  26 all: hello_world.hex
  27
  28 powerpc.lds: powerpc.lds.S
  29         $(CC) $(CFLAGS) -P -E powerpc.lds.S -o powerpc.lds
  30
  31 console.o: ../lib/console.c
  32         $(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@
  33
  34 hello_world.elf: hello_world.o head.o console.o powerpc.lds
  35         $(LD) $(LDFLAGS) -o $@ hello_world.o head.o console.o
  36         powerpc64le-linux-gnu-objdump -D hello_world.elf > hello_world.as
  37
  38 hello_world.bin: hello_world.elf
  39         $(OBJCOPY) -O binary $^ $@
  40
  41 hello_world.hex: hello_world.bin
  42         ../scripts/bin2hex.py $^ > $@
  43
  44 clean:
  45         @rm -f *.o hello_world.elf hello_world.bin hello_world.hex powerpc.lds
  46 distclean: clean
  47         rm -f *~
  48