Re: [Flex-help] undefined reference to 'yylex'

[liugongquan123 <liu...@16...>]

  Thank you very much for your help.  I fixed this issue by using flex-2.5.33 instead. So far as I know,the "undefined reference to 'yylex'" errors  of 
flex-2.5.39 does exist, maybe there is something to be corrected .


   Best regards.









At 2014-04-17 18:08:28,"Michele Bert" <mic...@gm...> wrote:
>2014-04-14 10:48 GMT+02:00 liugongquan123 <liu...@16...>:
>> I wonder if there is something incorrect in the generated Makefile , leading to the absence of yylex defination when generating libfl.so. ButI don't know how to fix it.Can you help me?  Thank you!>The question is why the linker isn't finding yylex() in his libfl.so, even though it's looking there. I'll look into that later this >evening. The point of libfl is that it provides(among other things) a yylex().
>
>Here we are going out of scope of my knowelge. If the yylex function
>is defined in libfl.so, the only thing I would check is whether and
>how it is exported. For example:
>- is it defined static or extern? Maybe your compiler, or options
>given to it implies a static declaration?
>- ir it C or C++. I mean: is it exported with mangled name?
>
>Michele
>
>
>-- 
>Michele