############################################################################
# arch/xtensa/src/lx7/Toolchain.defs
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.  The
# ASF licenses this file to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance with the
# License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
# License for the specific language governing permissions and limitations
# under the License.
#
############################################################################

# Supported toolchains
#
# Each toolchain definition should set:
#
#  CROSSDEV         The GNU toolchain triple (command prefix)
#  ARCHCPUFLAGS     CPU-specific flags selecting the instruction set
#                   FPU options, etc.
#  ARCHOPTIMIZATION The optimization level that results in
#                   reliable code generation.
#

ifeq ($(CONFIG_XTENSA_TOOLCHAIN_XCC), y)
  CROSSDEV = xt-
endif

ifeq ($(CONFIG_XTENSA_TOOLCHAIN_XCLANG), y)
  CROSSDEV = xt-
endif

ifeq ($(CONFIG_XTENSA_TOOLCHAIN_ESP), y)
  CROSSDEV = xtensa-$(CONFIG_ARCH_CHIP)-elf-
endif

ARCHCPUFLAGS = -mlongcalls

ifeq ($(CONFIG_MM_KASAN_INSTRUMENT_ALL),y)
  ARCHOPTIMIZATION += -fsanitize=kernel-address
  KASAN_PARAM += asan-stack=0
  KASAN_PARAM += asan-instrumentation-with-call-threshold=0

  ifeq ($(CONFIG_MM_KASAN_GLOBAL),y)
    KASAN_PARAM += asan-globals=1
  else
    KASAN_PARAM += asan-globals=0
  endif

  ifeq ($(CONFIG_MM_KASAN_DISABLE_READS_CHECK),y)
    KASAN_PARAM += asan-instrument-reads=0
  endif

  ifeq ($(CONFIG_MM_KASAN_DISABLE_WRITES_CHECK),y)
    KASAN_PARAM += asan-instrument-writes=0
  endif

  ifeq ($(CONFIG_ARCH_TOOLCHAIN_CLANG),y)
    ARCHOPTIMIZATION += $(addprefix -mllvm ,$(addprefix -,$(KASAN_PARAM)))
  else
    ARCHOPTIMIZATION += $(addprefix --param ,$(KASAN_PARAM))
  endif
endif

ifeq ($(CONFIG_MM_UBSAN_ALL),y)
  ARCHOPTIMIZATION += $(CONFIG_MM_UBSAN_OPTION)
endif

ifeq ($(CONFIG_MM_UBSAN_TRAP_ON_ERROR),y)
  ARCHOPTIMIZATION += -fsanitize-undefined-trap-on-error
endif

ifeq ($(CONFIG_DEBUG_CUSTOMOPT),y)
  ARCHOPTIMIZATION += $(CONFIG_DEBUG_OPTLEVEL)
else ifeq ($(CONFIG_DEBUG_FULLOPT),y)
  ifeq ($(CONFIG_ARCH_TOOLCHAIN_CLANG),y)
    ARCHOPTIMIZATION += -Oz
  else
    ARCHOPTIMIZATION += -Os
  endif
endif

ifneq ($(CONFIG_DEBUG_NOOPT),y)
  ARCHOPTIMIZATION += -fno-strict-aliasing
endif

ifeq ($(CONFIG_FRAME_POINTER),y)
  ARCHOPTIMIZATION += -fno-omit-frame-pointer
else
  ARCHOPTIMIZATION += -fomit-frame-pointer
endif

ifeq ($(CONFIG_STACK_CANARIES),y)
  ARCHOPTIMIZATION += -fstack-protector-all
endif

ifeq ($(CONFIG_STACK_USAGE),y)
  ARCHOPTIMIZATION += -fstack-usage
endif

ifneq ($(CONFIG_STACK_USAGE_WARNING),0)
  ARCHOPTIMIZATION += -Wstack-usage=$(CONFIG_STACK_USAGE_WARNING)
endif

ifeq ($(CONFIG_COVERAGE_ALL),y)
  ifeq ($(CONFIG_ARCH_TOOLCHAIN_GCC),y)
    ARCHOPTIMIZATION += -fprofile-arcs -ftest-coverage -fno-inline
  else ifeq ($(CONFIG_ARCH_TOOLCHAIN_CLANG),y)
    ARCHOPTIMIZATION += -fprofile-instr-generate -fcoverage-mapping
  endif
endif

# Instrumentation options

ifeq ($(CONFIG_ARCH_INSTRUMENT_ALL),y)
  ARCHOPTIMIZATION += -finstrument-functions
endif

ARCHCFLAGS += -fno-common
ARCHCXXFLAGS += -fno-common

ARCHCFLAGS += -Wall -Wstrict-prototypes -Wshadow -Wundef -Wno-attributes -Wno-unknown-pragmas -Wno-atomic-alignment

ARCHCXXFLAGS += -Wall -Wshadow -Wundef -Wno-attributes -Wno-unknown-pragmas -Wno-atomic-alignment

# When all C++ code is built using GCC 7.1 or a higher version,
# we can safely disregard warnings of the type "parameter passing for X changed in GCC 7.1."
# Refer to : https://stackoverflow.com/questions/48149323/what-does-the-gcc-warning-project-parameter-passing-for-x-changed-in-gcc-7-1-m

ifneq ($(CONFIG_LIBCXXTOOLCHAIN),y)
  ARCHCXXFLAGS += -nostdinc++
endif

ifneq ($(CONFIG_ARCH_TOOLCHAIN_CLANG),y)
  ARCHCFLAGS += -Wno-psabi
  ARCHCXXFLAGS += -Wno-psabi
endif

ifneq ($(CONFIG_CXX_STANDARD),)
  ARCHCXXFLAGS += -std=$(CONFIG_CXX_STANDARD)
endif

ifneq ($(CONFIG_CXX_EXCEPTION),y)
  ARCHCXXFLAGS += -fno-exceptions -fcheck-new
endif

ifneq ($(CONFIG_CXX_RTTI),y)
  ARCHCXXFLAGS += -fno-rtti
endif

ifneq ($(filter y,$(CONFIG_XTENSA_TOOLCHAIN_XCC)$(CONFIG_XTENSA_TOOLCHAIN_XCLANG)),)
  ARCHCXXFLAGS += -femulated-tls
endif

LDFLAGS += -nostdlib

SHMODULEFLAGS = -Bsymbolic -G -Bdynamic --entry=__start

# Optimization of unused sections

ifeq ($(CONFIG_DEBUG_OPT_UNUSED_SECTIONS),y)
  LDFLAGS          += --gc-sections
  ARCHOPTIMIZATION += -ffunction-sections -fdata-sections
endif

# Debug --whole-archive

ifeq ($(CONFIG_DEBUG_LINK_WHOLE_ARCHIVE),y)
  LDFLAGS += --whole-archive
endif

# Debug link map

ifeq ($(CONFIG_DEBUG_LINK_MAP),y)
  LDFLAGS += --cref -Map=$(call CONVERT_PATH,$(TOPDIR)$(DELIM)nuttx.map)
endif

ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
  ARCHOPTIMIZATION += $(CONFIG_DEBUG_SYMBOLS_LEVEL)
endif

# Default toolchain
ifeq ($(CONFIG_XTENSA_TOOLCHAIN_XCC), y)
  ARCHCFLAGS += -Wno-atomic-alignment
  ARCHCXXFLAGS += -Wno-atomic-alignment
  CC = $(CROSSDEV)xcc
  CXX = $(CROSSDEV)xc++
  CPP = $(CROSSDEV)xcc -E -P -x c
else ifeq ($(CONFIG_XTENSA_TOOLCHAIN_XCLANG), y)
  ARCHCFLAGS += -Wno-atomic-alignment
  ARCHCXXFLAGS += -Wno-atomic-alignment
  CC = $(CROSSDEV)clang
  CXX = $(CROSSDEV)clang++
  CPP = $(CROSSDEV)clang -E -P -x c
else
  CC = $(CROSSDEV)gcc
  CXX = $(CROSSDEV)g++
  CPP = $(CROSSDEV)gcc -E -P -x c
endif

LD = $(CROSSDEV)ld
STRIP = $(CROSSDEV)strip --strip-unneeded
AR = $(CROSSDEV)ar rcs
NM = $(CROSSDEV)nm
OBJCOPY = $(CROSSDEV)objcopy
OBJDUMP = $(CROSSDEV)objdump

ifeq ($(CONFIG_ARCH_TOOLCHAIN_GNU),y)
  ifeq ($(CONFIG_ARCH_TOOLCHAIN_CLANG),)
    ifeq ($(GCCVER),)
      export GCCVER := $(shell $(CC) --version | grep gcc | sed -E "s/.* ([0-9]+\.[0-9]+).*/\1/" | cut -d'.' -f1)
    endif
  endif
endif

# Add the builtin library

EXTRA_LIBS += $(wildcard $(shell $(CC) $(ARCHCPUFLAGS) --print-libgcc-file-name))

ifeq ($(CONFIG_LIBM_TOOLCHAIN),y)
  EXTRA_LIBS += $(wildcard $(shell $(CC) $(ARCHCPUFLAGS) --print-file-name=libm.a))
endif

ifeq ($(CONFIG_LIBSUPCXX_TOOLCHAIN),y)
  EXTRA_LIBS += $(wildcard $(shell $(CC) $(ARCHCPUFLAGS) --print-file-name=libsupc++.a))
endif

ifeq ($(CONFIG_COVERAGE_TOOLCHAIN),y)
  EXTRA_LIBS += $(wildcard $(shell $(CC) $(ARCHCPUFLAGS) --print-file-name=libgcov.a))
endif

# Loadable module definitions

CMODULEFLAGS = $(CFLAGS) -fvisibility=hidden -mtext-section-literals
LDMODULEFLAGS = -r -T $(call CONVERT_PATH,$(TOPDIR)/libs/libc/elf/gnu-elf.ld)

# ELF module definitions

CELFFLAGS = $(CFLAGS) -fvisibility=hidden -mtext-section-literals
CXXELFFLAGS = $(CXXFLAGS) -fvisibility=hidden -mtext-section-literals

LDELFFLAGS = -r -e __start
LDELFFLAGS += -T $(call CONVERT_PATH,$(TOPDIR)$(DELIM)libs$(DELIM)libc$(DELIM)elf$(DELIM)gnu-elf.ld)