# -*- makefile -*-
# Copyright 2012 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
#
# Toolchain configuration build system
#

# Toolchain configuration

min_make_version:=3.82
make_version_ok:=$(filter $(min_make_version), \
	$(firstword $(sort $(MAKE_VERSION) $(min_make_version))))
ifeq ($(make_version_ok),)
$(error ERROR: GNU make version $(min_make_version) or higher required.)
endif

# Default to clang if TEST_ASAN is enabled
ifneq ($(TEST_FUZZ)$(TEST_ASAN)$(TEST_MSAN)$(TEST_UBSAN),)
CC=clang
endif

# Extract cc-name
cc-name:=$(shell $(CC) -v 2>&1 | grep -q "clang version" && echo clang || echo gcc)

# Try not to assume too much about optional tools and prefixes
CCACHE:=$(shell which ccache 2>/dev/null)
ifeq ($(origin HOST_CROSS_COMPILE),undefined)
HOST_CROSS_COMPILE:=$(if $(shell which x86_64-pc-linux-gnu-gcc 2>/dev/null),x86_64-pc-linux-gnu-,)
endif

AR=$(CROSS_COMPILE)ar
CC=$(CCACHE) $(CROSS_COMPILE)$(cc-name)
CPP=$(CC) -E
CXX=$(CROSS_COMPILE)clang++
LD=$(CROSS_COMPILE)ld
NM=$(CROSS_COMPILE)nm
OBJCOPY=$(CROSS_COMPILE)objcopy
OBJDUMP=$(CROSS_COMPILE)objdump
ADDR2LINE=$(CROSS_COMPILE)addr2line
PKG_CONFIG?=pkg-config
BUILDCC?=$(CCACHE) gcc
HOSTCC?=$(CCACHE) $(HOST_CROSS_COMPILE)gcc
HOSTCXX?=$(CCACHE) $(HOST_CROSS_COMPILE)g++
PROTOC?=protoc

C_WARN = -Wstrict-prototypes -Wdeclaration-after-statement -Wno-pointer-sign
COMMON_WARN = -Wall -Wundef -Werror -Werror-implicit-function-declaration \
	-Wno-trigraphs -Wno-format-security -Wno-address-of-packed-member \
	-fno-common -fno-strict-aliasing -fno-strict-overflow

UBSAN_FLAGS=-fsanitize=array-bounds,vla-bound \
	-fno-sanitize=vptr \
	-fno-sanitize-recover=all

CFLAGS_WARN = $(COMMON_WARN) $(C_WARN)
CXXFLAGS_WARN = $(COMMON_WARN)
CFLAGS_DEBUG= -g
CFLAGS_DEBUG+=$(CFLAGS_DEBUG_CHIP)
CFLAGS_INCLUDE=$(foreach i,$(includes),-I$(i) ) -I.
CFLAGS_TEST=$(if $(TEST_BUILD),-DTEST_BUILD=$(EMPTY) \
                               -DTEST_TASKFILE=$(PROJECT).tasklist,) \
            $(if $(CTS_MODULE), $(CFLAGS_CTS)) \
            $(if $(EMU_BUILD),-DEMU_BUILD=$(EMPTY)) \
            $(if $($(PROJECT)-scale),-DTEST_TIME_SCALE=$($(PROJECT)-scale)) \
            -DTEST_$(PROJECT)=$(EMPTY) -DTEST_$(UC_PROJECT)=$(EMPTY) \
            $(if $(TEST_ASAN),-fsanitize=address) \
            $(if $(TEST_MSAN),-fsanitize=memory) \
            $(if $(TEST_UBSAN),$(UBSAN_FLAGS)) \
            $(if $(TEST_FUZZ),-fsanitize=fuzzer-no-link \
                       -fno-experimental-new-pass-manager -DTEST_FUZZ=$(EMPTY))
CFLAGS_COVERAGE=$(if $(TEST_COVERAGE),-fprofile-arcs -ftest-coverage \
				      -DTEST_COVERAGE=$(EMPTY),)
CFLAGS_DEFINE=-DOUTDIR=$(out)/$(BLD) -DCHIP=$(CHIP) -DBOARD_TASKFILE=$(_tsk_lst_file) \
              -DBOARD=$(BOARD) -DCORE=$(CORE) -DPROJECT=$(PROJECT) \
              -DCHIP_VARIANT=$(CHIP_VARIANT) -DCHIP_FAMILY=$(CHIP_FAMILY) \
              -DBOARD_$(UC_BOARD)=$(EMPTY) \
	      -DCHIP_$(UC_CHIP)=$(EMPTY) \
	      -DCORE_$(UC_CORE)=$(EMPTY) \
              -DCHIP_VARIANT_$(UC_CHIP_VARIANT)=$(EMPTY) \
	      -DCHIP_FAMILY_$(UC_CHIP_FAMILY)=$(EMPTY) \
	      -DFINAL_OUTDIR=$(out) \
	      -DPROTOBUF_MIN_PROTOC_VERSION=0 \
              $(CFLAGS_BASEBOARD)
CPPFLAGS=$(CFLAGS_DEFINE) $(CFLAGS_INCLUDE) $(CFLAGS_TEST) \
	 $(EXTRA_CFLAGS) $(CFLAGS_COVERAGE) $(LATE_CFLAGS_DEFINE) \
	-DSECTION_IS_$(BLD)=$(EMPTY) -DSECTION=$(BLD) $(CPPFLAGS_$(BLD))
BUILD_CPPFLAGS=$(CFLAGS_DEFINE) -Icore/host $(CFLAGS_INCLUDE) $(CFLAGS_TEST) \
	 $(EXTRA_CFLAGS) $(CFLAGS_COVERAGE) $(LATE_CFLAGS_DEFINE) \
	 -DSECTION_IS_$(BLD)=$(EMPTY) -DSECTION=$(BLD) $(CPPFLAGS_$(BLD))
HOST_CPPFLAGS=$(CFLAGS_DEFINE) $(CFLAGS_INCLUDE) $(CFLAGS_TEST) \
	 $(EXTRA_CFLAGS) $(CFLAGS_COVERAGE) $(LATE_CFLAGS_DEFINE) \
	 -DSECTION_IS_$(BLD)=$(EMPTY) -DSECTION=$(BLD) $(CPPFLAGS_$(BLD))
ifneq ($(BOARD),host)
CPPFLAGS+=-ffreestanding -fno-builtin -nostdinc -nostdlib
CPPFLAGS+=-Ibuiltin/
else
CPPFLAGS+=-Og
endif
CPPFLAGS+= -DCHROMIUM_EC=$(EMPTY)
CFLAGS=$(CPPFLAGS) $(CFLAGS_CPU) $(CFLAGS_DEBUG) $(COMMON_WARN) $(CFLAGS_y)
CFLAGS+= -ffunction-sections -fshort-wchar
CFLAGS+= -fno-delete-null-pointer-checks
ifneq ($(cc-name),clang)
CFLAGS+= -ffat-lto-objects
CFLAGS+= -fconserve-stack
endif
CXXFLAGS+=-DPROTOBUF_INLINE_NOT_IN_HEADERS=0

FTDIVERSION:=$(shell $(PKG_CONFIG) --modversion libftdi1 2>/dev/null)
ifneq ($(FTDIVERSION),)
  LIBFTDI_NAME=ftdi1
else
  LIBFTDI_NAME=ftdi
endif

LIBFTDIUSB_CFLAGS:=$(shell $(PKG_CONFIG) --cflags lib${LIBFTDI_NAME} libusb-1.0)
LIBFTDIUSB_LDLIBS:=$(shell $(PKG_CONFIG) --libs   lib${LIBFTDI_NAME} libusb-1.0)

ifeq ($(TEST_FUZZ),y)
LIBPROTOBUF_CFLAGS:=$(shell $(PKG_CONFIG) --cflags protobuf)
LIBPROTOBUF_LDLIBS:=$(shell $(PKG_CONFIG) --libs   protobuf)

LIBPROTOBUF_MUTATOR_CFLAGS:=${LIBPROTOBUF_CFLAGS} \
	$(shell $(PKG_CONFIG) --cflags libprotobuf-mutator)
LIBPROTOBUF_MUTATOR_LDLIBS:=$(shell $(PKG_CONFIG) --libs libprotobuf-mutator) \
	${LIBPROTOBUF_LDLIBS}
endif

BUILD_CFLAGS=$(LIBFTDIUSB_CFLAGS) $(BUILD_CPPFLAGS) -O3 $(CFLAGS_DEBUG)
BUILD_CFLAGS+=$(CFLAGS_WARN)
BUILD_CFLAGS+=-DCHROMIUM_EC=$(EMPTY)
HOST_CFLAGS=$(HOST_CPPFLAGS) -O3 $(CFLAGS_DEBUG) $(CFLAGS_WARN) \
	    -DHOST_TOOLS_BUILD=$(EMPTY)
HOST_CFLAGS+=$(LIBFTDIUSB_CFLAGS)
HOST_CFLAGS+=-DCHROMIUM_EC=$(EMPTY)
ifneq (${SYSROOT},)
  LDFLAGS_EXTRA+=--sysroot=${SYSROOT}
endif
LDFLAGS=-nostdlib -g -Wl,-X -Wl,--gc-sections -Wl,--build-id=none \
	$(LDFLAGS_EXTRA) $(CFLAGS_CPU)
BUILD_LDFLAGS=$(LIBFTDIUSB_LDLIBS)
HOST_LDFLAGS=$(LIBFTDIUSB_LDLIBS)
HOST_TEST_LDFLAGS=-Wl,-T core/host/host_exe.lds -lrt -pthread -rdynamic -lm\
		  -fuse-ld=bfd \
		  $(if $(TEST_COVERAGE),-fprofile-arcs,) \
		  $(if $(TEST_ASAN), -fsanitize=address) \
		  $(if $(TEST_MSAN), -fsanitize=memory) \
		  $(if $(TEST_UBSAN), ${UBSAN_FLAGS}) \
		  $(if $(TEST_FUZZ), -fsanitize=fuzzer)

# utility function to provide overridable defaults
# $1: name of variable to set
# $2: first default to use
# $3: second default to use
set-option = $(eval $1=$$(strip $$(if $(2),$(2),$(3))))