xref: /openbmc/u-boot/examples/standalone/Makefile (revision 8f6d5bbb) 
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-$(CONFIG_SMC91111)           += smc91111_eeprom
8extra-$(CONFIG_SMC911X)            += smc911x_eeprom
9extra-$(CONFIG_SPI_FLASH_ATMEL)    += atmel_df_pow2
10extra-$(CONFIG_PPC)                += sched
11
12#
13# Some versions of make do not handle trailing white spaces properly;
14# leading to build failures. The problem was found with GNU Make 3.80.
15# Using 'strip' as a workaround for the problem.
16#
17ELF := $(strip $(extra-y))
18
19extra-y += $(addsuffix .srec,$(extra-y)) $(addsuffix .bin,$(extra-y))
20clean-files  := *.srec *.bin
21
22COBJS	:= $(ELF:=.o)
23
24LIB	= $(obj)/libstubs.o
25
26LIBOBJS-$(CONFIG_PPC) += ppc_longjmp.o ppc_setjmp.o
27LIBOBJS-y += stubs.o
28
29targets += $(patsubst $(obj)/%,%,$(LIB)) $(COBJS) $(LIBOBJS-y)
30
31LIBOBJS	:= $(addprefix $(obj)/,$(LIBOBJS-y))
32ELF	:= $(addprefix $(obj)/,$(ELF))
33
34# For PowerPC there's no need to compile standalone applications as a
35# relocatable executable.  The relocation data is not needed, and
36# also causes the entry point of the standalone application to be
37# inconsistent.
38ifeq ($(CONFIG_PPC),y)
39PLATFORM_CPPFLAGS := $(filter-out $(RELFLAGS),$(PLATFORM_CPPFLAGS))
40endif
41
42# We don't want gcc reordering functions if possible.  This ensures that an
43# application's entry point will be the first function in the application's
44# source file.
45ccflags-y += $(call cc-option,-fno-toplevel-reorder)
46
47LDFLAGS_STANDALONE	+= -Ttext $(CONFIG_STANDALONE_LOAD_ADDR)
48
49#########################################################################
50
51quiet_cmd_link_lib = LD      $@
52      cmd_link_lib = $(LD) $(ld_flags) -r -o $@ $(filter $(LIBOBJS), $^)
53
54$(LIB):	$(LIBOBJS) FORCE
55	$(call if_changed,link_lib)
56
57quiet_cmd_link_elf = LD      $@
58      cmd_link_elf = $(LD) $(LDFLAGS) $(LDFLAGS_STANDALONE) -g  \
59		     -o $@ -e $(SYM_PREFIX)$(@F) $< $(LIB) $(PLATFORM_LIBGCC)
60
61$(ELF): $(obj)/%: $(obj)/%.o $(LIB) FORCE
62	$(call if_changed,link_elf)
63
64$(obj)/%.srec: OBJCOPYFLAGS += -O srec
65$(obj)/%.srec: $(obj)/% FORCE
66	$(call if_changed,objcopy)
67
68$(obj)/%.bin: OBJCOPYFLAGS += -O binary
69$(obj)/%.bin: $(obj)/% FORCE
70	$(call if_changed,objcopy)
71
72# some files can only build in ARM or THUMB2, not THUMB1
73
74ifdef CONFIG_SYS_THUMB_BUILD
75ifndef CONFIG_HAS_THUMB2
76
77CFLAGS_stubs.o := -marm
78
79endif
80endif
81