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# SPDX-License-Identifier: BSD-3-Clause
#
# This file is meant to be included by in-tree payloads
# to provide default targets for incremental builds.
#
# Variables with file names and directory overrides have
# to be defined in advance for proper dependency tracking.
# Then, include this file. e.g
#
# obj := output
# OBJS := $(obj)/payload.o
# TARGET := $(obj)/payload.elf
# include ../path/to/libpayload/Makefile.payload
#
# Find relative path to libpayload (where this Makefile resides).
LIBPAYLOAD_SRC := $(dir $(lastword $(MAKEFILE_LIST)))
LIBPAYLOAD_SRC := $(patsubst %/,%,$(LIBPAYLOAD_SRC))
# Build dir and config for libpayload. Need absolute
# paths to pass to libpayload's sub-make.
LIBPAYLOAD_OBJ ?= $(CURDIR)/libpayload
LIBPAYLOAD := $(LIBPAYLOAD_OBJ)/libpayload.a
LIBPAYLOAD_CONFIG_H := $(LIBPAYLOAD_OBJ)/libpayload-config.h
LIBPAYLOAD_DOTCONFIG ?= $(CURDIR)/.lp.config
LIBPAYLOAD_DEFCONFIG ?= $(CURDIR)/$(LIBPAYLOAD_SRC)/configs/defconfig
# Some default dependencies for all targets:
DEFAULT_DEPS := Makefile $(lastword $(MAKEFILE_LIST))
DEFAULT_DEPS += $(PAYLOAD_DEPS)
obj ?= build
ARCH ?=
OBJS ?=
CCACHE ?=
CFLAGS = $(CFLAGS_$(ARCH))
CFLAGS += -Os -ffreestanding
CFLAGS += -Wall -Wextra -Wmissing-prototypes -Wvla -Werror
STRIP ?= debug
$(TARGET):
# Make is silent per default, but `make V=1` will show all calls.
Q:=@
ifneq ($(V),1)
ifneq ($(Q),)
.SILENT:
MAKEFLAGS += -s
endif
endif
export V
ifeq ($(filter %clean,$(MAKECMDGOALS)),)
-include $(LIBPAYLOAD_DOTCONFIG)
xcompile := $(obj)/xcompile
xcompile_script := $(LIBPAYLOAD_SRC)/../../util/xcompile/xcompile
# In addition to the dependency below, create the file if it doesn't exist
# to silence warnings about a file that would be generated anyway.
$(if $(wildcard $(xcompile)),,$(shell \
mkdir -p $(dir $(xcompile)) && \
$(xcompile_script) $(XGCCPATH) > $(xcompile) || rm -f $(xcompile)))
$(xcompile): $(xcompile_script)
$< $(XGCCPATH) > $@
include $(xcompile)
ifneq ($(XCOMPILE_COMPLETE),1)
$(shell rm -f $(XCOMPILE_COMPLETE))
$(error $(xcompile) deleted because it's invalid. \
Restarting the build should fix that, or explain the problem.)
endif
# `lpgcc` in in-tree mode:
LPGCC = CC="$(CCACHE) $(GCC_CC_$(ARCH))"
LPGCC += _OBJ="$(LIBPAYLOAD_OBJ)"
LPGCC += $(LIBPAYLOAD_SRC)/bin/lpgcc
LPAS = AS="$(AS_$(ARCH))"
LPAS += $(LIBPAYLOAD_SRC)/bin/lpas
OBJCOPY = $(OBJCOPY_$(ARCH))
$(obj)/%.bin: $(OBJS) $(LIBPAYLOAD) $(DEFAULT_DEPS)
@printf " LPGCC $(subst $(obj)/,,$@)\n"
$(LPGCC) $(CFLAGS) -o $@ $(OBJS)
$(obj)/%.map: $(obj)/%.bin
@printf " SYMS $(subst $(obj)/,,$@)\n"
$(NM_$(ARCH)) -n $< > $@
$(obj)/%.debug: $(obj)/%.bin
@printf " DEBUG $(subst $(obj)/,,$@)\n"
$(OBJCOPY) --only-keep-debug $< $@
.PRECIOUS: $(obj)/%.debug
$(obj)/%.elf: $(obj)/%.bin $(obj)/%.debug
@printf " STRIP $(subst $(obj)/,,$@)\n"
$(OBJCOPY) --strip-$(STRIP) $< $@
$(OBJCOPY) --add-gnu-debuglink=$(obj)/$*.debug $@
$(obj)/%.o: %.c $(LIBPAYLOAD_CONFIG_H) $(DEFAULT_DEPS)
@printf " LPGCC $(subst $(obj)/,,$@)\n"
$(LPGCC) -MMD $(CFLAGS) -c $< -o $@
$(obj)/%.S.o: %.S $(LIBPAYLOAD_CONFIG_H) $(DEFAULT_DEPS)
@printf " LPAS $(subst $(obj)/,,$@)\n"
$(LPAS) $< -o $@
-include $(OBJS:.o=.d)
.PRECIOUS: $(OBJS)
LIBPAYLOAD_OPTS := obj="$(LIBPAYLOAD_OBJ)"
LIBPAYLOAD_OPTS += DOTCONFIG="$(LIBPAYLOAD_DOTCONFIG)"
LIBPAYLOAD_OPTS += CONFIG_=CONFIG_LP_
LIBPAYLOAD_OPTS += $(if $(CCACHE),CONFIG_LP_CCACHE=y)
ifneq ($(LIBPAYLOAD_DEFCONFIG),)
$(LIBPAYLOAD_DOTCONFIG): $(LIBPAYLOAD_DEFCONFIG)
$(MAKE) -C $(LIBPAYLOAD_SRC) $(LIBPAYLOAD_OPTS) \
KBUILD_DEFCONFIG=$(LIBPAYLOAD_DEFCONFIG) defconfig
endif
$(LIBPAYLOAD_CONFIG_H): $(LIBPAYLOAD_DOTCONFIG)
$(MAKE) -C $(LIBPAYLOAD_SRC) $(LIBPAYLOAD_OPTS) $(LIBPAYLOAD_CONFIG_H)
force-relay:
lp-%: force-relay
$(MAKE) -C $(LIBPAYLOAD_SRC) $(LIBPAYLOAD_OPTS) $*
$(LIBPAYLOAD): force-relay | $(LIBPAYLOAD_CONFIG_H)
$(MAKE) -C $(LIBPAYLOAD_SRC) $(LIBPAYLOAD_OPTS)
$(shell mkdir -p $(sort $(dir $(OBJS))))
.PHONY: force-relay
else # %clean,$(MAKECMDGOALS)
default-payload-clean:
rm -rf $(obj) $(LIBPAYLOAD_OBJ)
clean: default-payload-clean
default-payload-distclean: clean
rm -f $(LIBPAYLOAD_DOTCONFIG) $(LIBPAYLOAD_DOTCONFIG).old
distclean: default-payload-distclean
.PHONY: default-payload-clean clean default-payload-distclean distclean
endif
|
