# Copyright (C) 2011-2019 (see AUTHORS file for a list of contributors)
#
# This file is part of GNSS-SDR.
#
# SPDX-License-Identifier: GPL-3.0-or-later

set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_PROCESSOR ARM)

if(MINGW OR CYGWIN OR WIN32)
    set(UTIL_SEARCH_CMD where)
elseif(UNIX OR APPLE)
    set(UTIL_SEARCH_CMD which)
endif()

set(TOOLCHAIN_PREFIX arm-linux-gnueabihf-)

execute_process(
    COMMAND ${UTIL_SEARCH_CMD} ${TOOLCHAIN_PREFIX}gcc
    OUTPUT_VARIABLE BINUTILS_PATH
    OUTPUT_STRIP_TRAILING_WHITESPACE
)

get_filename_component(ARM_TOOLCHAIN_DIR ${BINUTILS_PATH} DIRECTORY)

# The following is not needed on debian
# Without that flag CMake is not able to pass test compilation check
#set(CMAKE_EXE_LINKER_FLAGS_INIT "--specs=nosys.specs")

set(CMAKE_C_COMPILER ${TOOLCHAIN_PREFIX}gcc)
set(CMAKE_ASM_COMPILER ${CMAKE_C_COMPILER})
set(CMAKE_CXX_COMPILER ${TOOLCHAIN_PREFIX}g++)
## the following is needed for CheckCSourceCompiles used in lib/CMakeLists.txt
set(CMAKE_C_FLAGS "-mfpu=neon" CACHE STRING "" FORCE)
set(CMAKE_ASM_FLAGS "${CMAKE_C_FLAGS}" CACHE STRING "" FORCE)

set(CMAKE_OBJCOPY ${ARM_TOOLCHAIN_DIR}/${TOOLCHAIN_PREFIX}objcopy CACHE INTERNAL "objcopy tool")
set(CMAKE_SIZE_UTIL ${ARM_TOOLCHAIN_DIR}/${TOOLCHAIN_PREFIX}size CACHE INTERNAL "size tool")

set(CMAKE_FIND_ROOT_PATH ${BINUTILS_PATH})

set(CMAKE_CROSSCOMPILING_EMULATOR "qemu-arm -L /usr/arm-linux-gnueabihf/")