1# SPDX-License-Identifier: GPL-2.0+ 2# 3# (C) Copyright 2000-2006 4# Wolfgang Denk, DENX Software Engineering, wd@denx.de. 5 6extra-y := hello_world 7extra-$(CONFIG_SPI_FLASH_ATMEL) += atmel_df_pow2 8extra-$(CONFIG_PPC) += sched 9 10# 11# Some versions of make do not handle trailing white spaces properly; 12# leading to build failures. The problem was found with GNU Make 3.80. 13# Using 'strip' as a workaround for the problem. 14# 15ELF := $(strip $(extra-y)) 16 17extra-y += $(addsuffix .srec,$(extra-y)) $(addsuffix .bin,$(extra-y)) 18clean-files := *.srec *.bin 19 20COBJS := $(ELF:=.o) 21 22LIB = $(obj)/libstubs.o 23 24LIBOBJS-$(CONFIG_PPC) += ppc_longjmp.o ppc_setjmp.o 25LIBOBJS-y += stubs.o 26 27targets += $(patsubst $(obj)/%,%,$(LIB)) $(COBJS) $(LIBOBJS-y) 28 29LIBOBJS := $(addprefix $(obj)/,$(LIBOBJS-y)) 30ELF := $(addprefix $(obj)/,$(ELF)) 31 32# Disable LTO for these builds 33CFLAGS_REMOVE_hello_world.o := $(LTO_CFLAGS) 34CFLAGS_REMOVE_stubs.o := $(LTO_CFLAGS) 35 36# For PowerPC there's no need to compile standalone applications as a 37# relocatable executable. The relocation data is not needed, and 38# also causes the entry point of the standalone application to be 39# inconsistent. 40ifeq ($(CONFIG_PPC),y) 41PLATFORM_CPPFLAGS := $(filter-out $(RELFLAGS),$(PLATFORM_CPPFLAGS)) 42endif 43 44# We don't want gcc reordering functions if possible. This ensures that an 45# application's entry point will be the first function in the application's 46# source file. 47ccflags-y += $(call cc-option,-fno-toplevel-reorder) 48 49LDFLAGS_STANDALONE += -Ttext $(CONFIG_STANDALONE_LOAD_ADDR) 50 51######################################################################### 52 53quiet_cmd_link_lib = LD $@ 54 cmd_link_lib = $(LD) $(ld_flags) -r -o $@ $(filter $(LIBOBJS), $^) 55 56$(LIB): $(LIBOBJS) FORCE 57 $(call if_changed,link_lib) 58 59quiet_cmd_link_elf = LD $@ 60 cmd_link_elf = $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_STANDALONE) -g \ 61 -o $@ -e $(SYM_PREFIX)$(@F) $< $(LIB) $(PLATFORM_LIBGCC) 62 63$(ELF): $(obj)/%: $(obj)/%.o $(LIB) FORCE 64 $(call if_changed,link_elf) 65 66$(obj)/%.srec: OBJCOPYFLAGS += -O srec 67$(obj)/%.srec: $(obj)/% FORCE 68 $(call if_changed,objcopy) 69 70$(obj)/%.bin: OBJCOPYFLAGS += -O binary 71$(obj)/%.bin: $(obj)/% FORCE 72 $(call if_changed,objcopy) 73 74# some files can only build in ARM or THUMB2, not THUMB1 75 76ifdef CONFIG_SYS_THUMB_BUILD 77ifndef CONFIG_HAS_THUMB2 78 79CFLAGS_stubs.o := -marm 80 81endif 82endif 83