set(LIB_NAME CMSIS)
if(NOT DEFINED ENV{MCU_SERIES})
    message(FATAL_ERROR "MCU_SERIES NOT DEFINED. Please define it like stm32fxx")
else()
    string(TOUPPER $ENV{MCU_SERIES} MCU_SERIES_UPPERCASE)
endif()

project(${LIB_NAME}
        LANGUAGES C ASM
        )
if (NOT DEFINED ENV{MCU})
    message(FATAL_ERROR "PLEASE DEFINE ENV{MCU} i.e STM32F427xx")
endif ()

if (NOT GTEST)
    if (NOT $ENV{CORTEX-M} STREQUAL "3" AND NOT $ENV{CORTEX-M} STREQUAL "1" AND NOT $ENV{CORTEX-M} STREQUAL "0" AND NOT $ENV{CORTEX-M} STREQUAL "4" AND NOT $ENV{CORTEX-M} STREQUAL "3" AND NOT $ENV{CORTEX-M} STREQUAL "55")
        message(FATAL_ERROR "Error: please set CORTEX-M")
    endif ()

    if (NOT DEFINED ENV{COMPILE_OPTIONS})
        set(COMPILE_OPTIONS -ffunction-sections -fdata-sections -fno-common -fmessage-length=0 $<$<COMPILE_LANGUAGE:CXX>:-fno-rtti> -mcpu=cortex-m$ENV{CORTEX-M} -mthumb -mthumb-interwork)
        message(WARNING "${LIB_NAME} compile with default options")
    else ()
        set(COMPILE_OPTIONS $ENV{COMPILE_OPTIONS})
    endif()
endif()

add_library(${LIB_NAME} INTERFACE)
target_include_directories(${LIB_NAME} INTERFACE Include Device/ST/${MCU_SERIES_UPPERCASE}/Include)
target_compile_definitions(${LIB_NAME} INTERFACE "$ENV{MCU}")
if (NOT $ENV{CORTEX-M} STREQUAL "3" AND NOT $ENV{CORTEX-M} STREQUAL "1" AND NOT $ENV{CORTEX-M} STREQUAL "0" AND NOT $ENV{CORTEX-M} STREQUAL "4" AND NOT $ENV{CORTEX-M} STREQUAL "3" AND NOT $ENV{CORTEX-M} STREQUAL "55")
    message(FATAL_ERROR "Error: please set CORTEX-M")
else ()
    target_compile_options(${LIB_NAME} BEFORE INTERFACE ${COMPILE_OPTIONS})
endif ()