toolchain_arm_none_eabi_gcc.cmake

include(CMakeForceCompiler)
set(CMAKE_SYSTEM_NAME Generic)
set(CMAKE_SYSTEM_VERSION 1)
set(CMAKE_SYSTEM_PROCESSOR cortex-m4)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")
set(CMAKE_SHARED_LINKER_FLAGS "-mthumb -mthumb-interwork -mcpu=cortex-m4")
set(SHARED_C_CXX_FLAGS "-fmessage-length=0 -flto -ffunction-sections -fdata-sections -fno-strict-aliasing -Wall -Wextra")

find_program(ARM_CC arm-none-eabi-gcc)
find_program(ARM_CXX arm-none-eabi-g++)
find_program(ARM_OBJCOPY arm-none-eabi-objcopy)
find_program(ARM_SIZE_TOOL arm-none-eabi-size)
find_program(ARM_AS arm-none-eabi-as)
find_program(ARM_AR arm-none-eabi-ar)
find_program(ARM_RANLIB arm-none-eabi-ranlib)

CMAKE_FORCE_C_COMPILER(${ARM_CC} GNU)
CMAKE_FORCE_CXX_COMPILER(${ARM_CXX} GNU)
set(CMAKE_ASM          ${ARM_AS})
set(CMAKE_AR           ${ARM_AR})
set(CMAKE_RANLIB       ${ARM_RANLIB})

set(CMAKE_C_FLAGS "${SHARED_C_CXX_FLAGS} -std=gnu99")
set(CMAKE_CXX_FLAGS "${SHARED_C_CXX_FLAGS} -std=gnu++11 -pedantic -fno-exceptions -fno-rtti")
set(CMAKE_EXE_LINKER_FLAGS ${CMAKE_SHARED_LINKER_FLAGS})

if (CMAKE_SYSTEM_PROCESSOR STREQUAL "cortex-m4")
    set(CMAKE_C_FLAGS
            "${CMAKE_C_FLAGS}"
            "${CMAKE_SHARED_LINKER_FLAGS}"
            )
else ()
    message(WARNING
            "Processor not recognised in toolchain file, "
            "compiler flags not configured."
            )
endif ()

# fix long strings (CMake appends semicolons)
string(REGEX REPLACE ";" " " CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")

set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS}" CACHE STRING "")

set(BUILD_SHARED_LIBS OFF)