################交叉编译#####################
#cross-compilation config
set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_PROCESSOR arm)

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_FIND_ROOT_PATH_MODE_PACKAGE ONLY)


set(CPU_TYPE "$ENV{CPU_TYPE}" )
set(PLAM_TYPE "$ENV{PLAM_TYPE}" )
set(LIB_TYPE "$ENV{LIB_TYPE}"  )
set(SYSTEM "$ENV{SYSTEM}" )
set(CORE "$ENV{CORE}" )
set(LIB_RUN_TYPE "$ENV{LIB_RUN_TYPE}" ) 
set(BUILD_DIR "$ENV{BUILD_TMP_DIR}" ) #version id
set(OBJCOPY_PATH "$ENV{OBJCOPY_PATH}" ) #OBJCOPY_PATH
set(COMPILE_MODE "$ENV{COMPILE_MODE}" )
set(CC_TYPE "$ENV{CC_TYPE}" ) 
set(TOOLCHAIN_DIR "$ENV{HCC_PATH}") #该路径应该是外部传入,指向编译工具路径

##compiler specified in /etc/profile
set(CMAKE_C_COMPILER "${TOOLCHAIN_DIR}/arm-none-eabi-gcc" CACHE PATH "arm-gcc C compiler" FORCE)
set(CMAKE_ASM_COMPILER "${TOOLCHAIN_DIR}/arm-none-eabi-gcc" CACHE PATH "arm-gcc ASM compiler" FORCE)

if(${CPU_TYPE} STREQUAL "m4")
        set(CMAKE_ASM_FLAGS "--specs=nosys.specs")
        set(CMAKE_ASM_COMPILE_OBJECT "<CMAKE_ASM_COMPILER>  -O2  -pipe ${STRONG_COMPILE_WARING_FLAG} ${COMPILE_WARING_FLAG} -std=gnu11 -fno-common -fomit-frame-pointer -mthumb -mcpu=cortex-m4 -mfloat-abi=softfp -mfpu=fpv4-sp-d16 -Wa,-mimplicit-it=thumb  -fstack-protector-strong  -funsigned-char  <FLAGS> <INCLUDES> -c <SOURCE> -o <OBJECT>")
        set(CMAKE_C_FLAGS "--specs=nosys.specs") #原ID形式\"888888\"
        set(CMAKE_C_COMPILE_OBJECT "<CMAKE_C_COMPILER> -O2 -pipe  ${STRONG_COMPILE_WARING_FLAG} ${COMPILE_WARING_FLAG} -std=gnu11 -fno-common -fomit-frame-pointer -mcpu=cortex-m4 -mthumb -mfloat-abi=softfp -mfpu=fpv4-sp-d16   -fstack-protector-strong  -fdata-sections  -ffunction-sections -fshort-enums  -funsigned-char -DSECUREC_BUFFER_SIZE=32 <FLAGS> <INCLUDES> -c <SOURCE> -o <OBJECT>")
endif()


set(CMAKE_LINKER "${TOOLCHAIN_DIR}/arm-none-eabi-ld" CACHE STRING "" FORCE) 
set(CMAKE_AR "${TOOLCHAIN_DIR}/arm-none-eabi-ar" CACHE STRING "" FORCE) 
set(CMAKE_C_LINK_FLAGS "-r ")
set(CMAKE_C_ARCHIVE_CREATE "<CMAKE_AR> -r <TARGET> <OBJECTS>")