AC_DEFUN([AI_CHECK_NANOSLEEP],
    [
        AC_LANG_PUSH(C)
    
        findNanosleep()
        {
            AI_CHECK_NANOSLEEP_save_LIBS="${LIBS}"
            LIBS=""
            AC_SEARCH_LIBS([nanosleep], [rt posix4],
                [
                    AI_NANOSLEEP="yes"
                ],
                [
                    AI_NANOSLEEP="no"
                ])
            AI_NANOSLEEP_LIBS="${LIBS}"
            LIBS="${AI_CHECK_NANOSLEEP_save_LIBS}"
        }

        findNanosleep
        if test "x${AI_NANOSLEEP}" = "xno" || test "x${AI_NANOSLEEP_LIBS}" = "x-lc"
        then
            AI_NANOSLEEP_LIBS=""
        fi
        AC_SUBST([AI_NANOSLEEP_LIBS])
        
        AC_LANG_POP(C)
    ])