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Makefile: descend into subdirectories only when CONFIG_API is defined
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1 #
2 # (C) Copyright 2007 Semihalf
3 #
4 # SPDX-License-Identifier:      GPL-2.0+
5 #
6
7 ifeq ($(ARCH),powerpc)
8 LOAD_ADDR = 0x40000
9 endif
10 ifeq ($(ARCH),arm)
11 LOAD_ADDR = 0x1000000
12 endif
13
14 include $(TOPDIR)/config.mk
15
16 # Resulting ELF and binary exectuables will be named demo and demo.bin
17 OUTPUT = $(obj)demo
18
19 # Source files located in the examples/api directory
20 SOBJ_FILES-y += crt0.o
21 COBJ_FILES-y += demo.o
22 COBJ_FILES-y += glue.o
23 COBJ_FILES-y += libgenwrap.o
24
25 # Source files which exist outside the examples/api directory
26 EXT_COBJ_FILES-y += lib/crc32.o
27 EXT_COBJ_FILES-y += lib/ctype.o
28 EXT_COBJ_FILES-y += lib/div64.o
29 EXT_COBJ_FILES-y += lib/string.o
30 EXT_COBJ_FILES-y += lib/time.o
31 EXT_COBJ_FILES-y += lib/vsprintf.o
32 EXT_SOBJ_FILES-$(CONFIG_PPC) += arch/powerpc/lib/ppcstring.o
33
34 # Create a list of source files so their dependencies can be auto-generated
35 SRCS    += $(addprefix $(SRCTREE)/,$(EXT_COBJ_FILES-y:.o=.c))
36 SRCS    += $(addprefix $(SRCTREE)/,$(EXT_SOBJ_FILES-y:.o=.S))
37 SRCS    += $(addprefix $(SRCTREE)/examples/api/,$(COBJ_FILES-y:.o=.c))
38 SRCS    += $(addprefix $(SRCTREE)/examples/api/,$(SOBJ_FILES-y:.o=.S))
39
40 # Create a list of object files to be compiled
41 OBJS    += $(addprefix $(obj),$(SOBJ_FILES-y))
42 OBJS    += $(addprefix $(obj),$(COBJ_FILES-y))
43 OBJS    += $(addprefix $(obj),$(notdir $(EXT_COBJ_FILES-y)))
44 OBJS    += $(addprefix $(obj),$(notdir $(EXT_SOBJ_FILES-y)))
45
46 all:    $(obj).depend $(OUTPUT)
47
48 #########################################################################
49
50 $(OUTPUT):      $(OBJS)
51                 $(LD) --gc-sections -Ttext $(LOAD_ADDR) -o $@ $^ $(PLATFORM_LIBS)
52                 $(OBJCOPY) -O binary $@ $(OUTPUT).bin 2>/dev/null
53
54 # Rule to build generic library C files
55 $(obj)%.o: $(SRCTREE)/lib/%.c
56         $(CC) -g $(CFLAGS) -c -o $@ $<
57
58 # Rule to build architecture-specific library assembly files
59 $(obj)%.o: $(SRCTREE)/arch/$(ARCH)/lib/%.S
60         $(CC) -g $(CFLAGS) -c -o $@ $<
61
62 #########################################################################
63
64 # defines $(obj).depend target
65 include $(SRCTREE)/rules.mk
66
67 sinclude $(obj).depend
68
69 #########################################################################