Toolchain.defs

############################################################################
# arch/misoc/src/lm32/Toolchain.defs
#
# SPDX-License-Identifier: Apache-2.0
#
# 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.
#
############################################################################

# Setup for the selected toolchain

#
# Select and allow the selected toolchain to be overridden by a command-line
#selection.
#

ifeq ($(filter y, \
      $(CONFIG_LM32_TOOLCHAIN_BUILDROOT) \
    ),y)
  CONFIG_LM32_TOOLCHAIN ?= BUILDROOT
endif

ifeq ($(filter y, \
      $(CONFIG_LM32_TOOLCHAIN_GNU) \
    ),y)
  CONFIG_LM32_TOOLCHAIN ?= GNU
endif

#
# 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_DEBUG_CUSTOMOPT),y)
  ARCHOPTIMIZATION += $(CONFIG_DEBUG_OPTLEVEL)
else ifeq ($(CONFIG_DEBUG_FULLOPT),y)
  ARCHOPTIMIZATION += -Os
endif

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

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

LDFLAGS += -nostdlib

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

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

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

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

# NuttX buildroot under Linux or Cygwin

ifeq ($(CONFIG_LM32_TOOLCHAIN),BUILDROOT)
  CROSSDEV ?= lm32-nuttx-elf-
endif

# Generic GNU toolchain

ifeq ($(CONFIG_LM32_TOOLCHAIN),GNUL)
  CROSSDEV ?= lm32-elf-
endif

# Default toolchain

CC = $(CROSSDEV)gcc
CXX = $(CROSSDEV)g++
CPP = $(CROSSDEV)gcc -E -P -x c
LD = $(CROSSDEV)ld
STRIP = $(CROSSDEV)strip --strip-unneeded
AR = $(CROSSDEV)ar rcs
NM = $(CROSSDEV)nm
OBJCOPY = $(CROSSDEV)objcopy
OBJDUMP = $(CROSSDEV)objdump

# 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

# Loadable module definitions

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

# ELF module definitions

CELFFLAGS = $(CFLAGS) -fvisibility=hidden
CXXELFFLAGS = $(CXXFLAGS) -fvisibility=hidden

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