examples/api/Makefile

# SPDX-License-Identifier: GPL-2.0+
#
# (C) Copyright 2007 Semihalf

# Provide symbol API_BUILD to signal that the API example is being built.
KBUILD_CPPFLAGS += -DAPI_BUILD

# Environment variable loadaddr is set from CONFIG_SYS_LOAD_ADDR.
# Run the examples 4 MiB above this address.
LOAD_ADDR:=${shell printf 0x%X $$(( $(CONFIG_SYS_LOAD_ADDR) + 0x400000 ))}

# Resulting ELF and binary exectuables will be named demo and demo.bin
extra-y = demo

# Source files located in the examples/api directory
OBJ-y += crt0.o
OBJ-y += demo.o
OBJ-y += glue.o
OBJ-y += libgenwrap.o

# Source files which exist outside the examples/api directory
EXT_COBJ-y += lib/crc32.o
EXT_COBJ-y += lib/ctype.o
EXT_COBJ-y += lib/div64.o
EXT_COBJ-y += lib/hexdump.o
EXT_COBJ-y += lib/string.o
EXT_COBJ-y += lib/time.o
EXT_COBJ-y += lib/vsprintf.o
EXT_COBJ-y += lib/charset.o
EXT_COBJ-$(CONFIG_LIB_UUID) += lib/uuid.o
EXT_SOBJ-$(CONFIG_PPC) += arch/powerpc/lib/ppcstring.o
ifneq ($(CONFIG_ARM)$(CONFIG_RISCV),)
EXT_SOBJ-$(CONFIG_USE_ARCH_MEMSET) += arch/$(ARCH)/lib/memset.o
endif

# Create a list of object files to be compiled
OBJS := $(OBJ-y) $(notdir $(EXT_COBJ-y) $(EXT_SOBJ-y))
targets += $(OBJS)
OBJS := $(addprefix $(obj)/,$(OBJS))

#########################################################################

quiet_cmd_link_demo = LD      $@
cmd_link_demo = $(LD) --gc-sections -Ttext $(LOAD_ADDR) -o $@ $(filter-out $(PHONY), $^) $(PLATFORM_LIBS)

$(obj)/demo: $(OBJS) FORCE
	$(call if_changed,link_demo)

# demo.bin is never genrated. Is this necessary?
OBJCOPYFLAGS_demo.bin := -O binary
$(obj)/demo.bin: $(obj)/demo FORCE
	$(call if_changed,objcopy)

# Rule to build generic library C files
$(addprefix $(obj)/,$(notdir $(EXT_COBJ-y))): $(obj)/%.o: lib/%.c FORCE
	$(call cmd,force_checksrc)
	$(call if_changed_rule,cc_o_c)

# Rule to build architecture-specific library assembly files
$(addprefix $(obj)/,$(notdir $(EXT_SOBJ-y))): $(obj)/%.o: arch/$(ARCH)/lib/%.S FORCE
	$(call if_changed_dep,as_o_S)