Makefile 2.3 KB

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  1. # SPDX-License-Identifier: GPL-2.0+
  2. #
  3. # (C) Copyright 2000-2006
  4. # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  5. extra-y := hello_world
  6. extra-$(CONFIG_SPI_FLASH_ATMEL) += atmel_df_pow2
  7. extra-$(CONFIG_PPC) += sched
  8. #
  9. # Some versions of make do not handle trailing white spaces properly;
  10. # leading to build failures. The problem was found with GNU Make 3.80.
  11. # Using 'strip' as a workaround for the problem.
  12. #
  13. ELF := $(strip $(extra-y))
  14. extra-y += $(addsuffix .srec,$(extra-y)) $(addsuffix .bin,$(extra-y))
  15. clean-files := *.srec *.bin
  16. COBJS := $(ELF:=.o)
  17. LIB = $(obj)/libstubs.o
  18. LIBOBJS-$(CONFIG_PPC) += ppc_longjmp.o ppc_setjmp.o
  19. LIBOBJS-y += stubs.o
  20. targets += $(patsubst $(obj)/%,%,$(LIB)) $(COBJS) $(LIBOBJS-y)
  21. LIBOBJS := $(addprefix $(obj)/,$(LIBOBJS-y))
  22. ELF := $(addprefix $(obj)/,$(ELF))
  23. # Disable LTO for these builds
  24. CFLAGS_REMOVE_hello_world.o := $(LTO_CFLAGS)
  25. CFLAGS_REMOVE_stubs.o := $(LTO_CFLAGS)
  26. # For PowerPC there's no need to compile standalone applications as a
  27. # relocatable executable. The relocation data is not needed, and
  28. # also causes the entry point of the standalone application to be
  29. # inconsistent.
  30. ifeq ($(CONFIG_PPC),y)
  31. PLATFORM_CPPFLAGS := $(filter-out $(RELFLAGS),$(PLATFORM_CPPFLAGS))
  32. endif
  33. # We don't want gcc reordering functions if possible. This ensures that an
  34. # application's entry point will be the first function in the application's
  35. # source file.
  36. ccflags-y += $(call cc-option,-fno-toplevel-reorder)
  37. LDFLAGS_STANDALONE += -Ttext $(CONFIG_STANDALONE_LOAD_ADDR)
  38. #########################################################################
  39. quiet_cmd_link_lib = LD $@
  40. cmd_link_lib = $(LD) $(ld_flags) -r -o $@ $(filter $(LIBOBJS), $^)
  41. $(LIB): $(LIBOBJS) FORCE
  42. $(call if_changed,link_lib)
  43. quiet_cmd_link_elf = LD $@
  44. cmd_link_elf = $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_STANDALONE) -g \
  45. -o $@ -e $(SYM_PREFIX)$(@F) $< $(LIB) $(PLATFORM_LIBGCC)
  46. $(ELF): $(obj)/%: $(obj)/%.o $(LIB) FORCE
  47. $(call if_changed,link_elf)
  48. $(obj)/%.srec: OBJCOPYFLAGS += -O srec
  49. $(obj)/%.srec: $(obj)/% FORCE
  50. $(call if_changed,objcopy)
  51. $(obj)/%.bin: OBJCOPYFLAGS += -O binary
  52. $(obj)/%.bin: $(obj)/% FORCE
  53. $(call if_changed,objcopy)
  54. # some files can only build in ARM or THUMB2, not THUMB1
  55. ifdef CONFIG_SYS_THUMB_BUILD
  56. ifndef CONFIG_HAS_THUMB2
  57. CFLAGS_stubs.o := -marm
  58. endif
  59. endif