cm4.cmake

include(CMakeForceCompiler)

if(NOT TOOLCHAIN_PATH)
  set(TOOLCHAIN_PATH "/usr")
  message(STATUS "Using default TOOLCHAIN_PATH: " ${TOOLCHAIN_PATH})
endif()

if(NOT TOOLCHAIN_PREFIX)
  set(TOOLCHAIN_PREFIX "arm-none-eabi")
  message(STATUS "Using default TOOLCHAIN_PREFIX: " ${TOOLCHAIN_PREFIX})
endif()

set(TOOLCHAIN_BIN_DIR ${TOOLCHAIN_PATH}/bin)
set(TOOLCHAIN_INC_DIR ${TOOLCHAIN_PATH}/${TOOLCHAIN_PREFIX}/include)
set(TOOLCHAIN_LIB_DIR ${TOOLCHAIN_PATH}/${TOOLCHAIN_PREFIX}/lib)

set(CMAKE_SYSTEM_NAME Generic)
set(CMAKE_SYSTEM_PROCESSOR arm-cm4)

CMAKE_FORCE_C_COMPILER(${TOOLCHAIN_BIN_DIR}/${TOOLCHAIN_PREFIX}-gcc GNU)
CMAKE_FORCE_CXX_COMPILER(${TOOLCHAIN_BIN_DIR}/${TOOLCHAIN_PREFIX}-g++ GNU)

set(CMAKE_OBJCOPY ${TOOLCHAIN_BIN_DIR}/${TOOLCHAIN_PREFIX}-objcopy CACHE INTERNAL "objcopy tool")
set(CMAKE_OBJDUMP ${TOOLCHAIN_BIN_DIR}/${TOOLCHAIN_PREFIX}-objdump CACHE INTERNAL "objdump tool")

set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fno-common -Wno-strict-prototypes -ffunction-sections -fdata-sections")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mcpu=cortex-m4 -march=armv7e-m -mthumb")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfloat-abi=hard -mfpu=fpv4-sp-d16")

set(CMAKE_C_FLAGS_DEBUG "-Og -g" CACHE INTERNAL "c compiler flags debug")
set(CMAKE_CXX_FLAGS_DEBUG "-Og -g" CACHE INTERNAL "cxx compiler flags debug")
set(CMAKE_EXE_LINKER_FLAGS_DEBUG "" CACHE INTERNAL "linker flags debug")

set(CMAKE_C_FLAGS_DEBUG "-Os -flto" CACHE INTERNAL "c compiler flags release")
set(CMAKE_CXX_FLAGS_DEBUG "-Os -flto" CACHE INTERNAL "cxx compiler flags release")
set(CMAKE_EXE_LINKER_FLAGS_DEBUG "-flto" CACHE INTERNAL "linker flags release")

set(CMAKE_FIND_ROOT_PATH ${TOOLCHAIN_PATH}/${TOOLCHAIN_PREFIX})
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

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

set(BUILD_SHARED_LIBS OFF)