include(CheckTypeSize)

check_type_size("long int" SIZEOF_LONG_INT)
check_type_size("long long" SIZEOF_LONG_LONG)
check_type_size("void *" SIZEOF_VOID_P)

set(CMAKE_EXTRA_INCLUDE_FILES sys/types.h)

check_type_size(int32_t INT32_T)
if (INT32_T)
    set(INT32_T int32_t)
else()
    set(INT32_T int)
endif()

check_type_size(u_int32_t U_INT32_T)
if (U_INT32_T)
    set(U_INT32_T u_int32_t)
else ()
    set(INT32_T u_int)
endif ()

check_type_size(u_int16_t U_INT16_T)
if (U_INT16_T)
    set(U_INT16_T u_int16_t)
else ()
    set(INT16_T u_short)
endif ()

check_type_size(u_int8_t U_INT8_T)
if (U_INT8_T)
    set(U_INT8_T u_int8_t)
else ()
    set(INT8_T u_char)
endif ()

unset(CMAKE_EXTRA_INCLUDE_FILES)

set(CMAKE_EXTRA_INCLUDE_FILES sys/socket.h)
check_type_size(socklen_t SOCKLEN_T)
if (SOCKLEN_T)
    set(SOCKLEN_T socklen_t)
else ()
    set(SOCKLEN_T int)
endif ()
unset(CMAKE_EXTRA_INCLUDE_FILES)

set(CMAKE_EXTRA_INCLUDE_FILES sys/sem.h)
check_type_size("struct sembuf" STRUCT_SEMBUF)
check_type_size("union semun" UNION_SEMUN)
unset(CMAKE_EXTRA_INCLUDE_FILES)