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

[Will E. <wes...@gm...>]

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().

On Friday, 11 April 2014,  8:38 am +0200, Michele Bert <mic...@gm...> wrote:

> 2014-04-11 3:29 GMT+02:00 liugongquan123 <liu...@16...>:
> > gcc  -g -O2 -Wall    -o xsup_set_pwd  xsup_set_pwd.o  -lfl -liw -lm -L../../../lib/libxsupgui -lxsupgui -lssl -lcrypto
> > /usr/local/lib/libfl.so: undefined reference to `yylex'
> > collect2: ld returned 1 exit status
> 
> It confirm what I told you. You are trying to build the executable
> "xsup_set_pwd" from the object "xsup_set_pwd.o" (which I assume is
> comeing from "xsup_set_pwd.c" and some libraries, and it does not find
> the function "yylex()" defined anywhere. There should be a file
> <lexfile>.ll, from which a <lexfile>.c is generated, and compiled in
> <lexfile>.o. If you recognise that file, try the command
> 
> gcc  -g -O2 -Wall    -o xsup_set_pwd  xsup_set_pwd.o <lexfile>.o -lfl
> -liw -lm -L../../../lib/libxsupgui -lxsupgui -lssl -lcrypto
> 
> and the link command should succeed.
> We can give more accurate indications if you run "make clean" and than
> "make", and post here the whole output.
> -- 
> Michele
> 
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-- 
Will Estes (wl...@us...)
Flex Project Maintainer
http://flex.sourceforge.net/