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

[Michele B. <mic...@gm...>]

2014-04-10 11:43 GMT+02:00 liugongquan123 <liu...@16...>:
> /usr/local/lib/libfl.so:undefined reference to 'yylex'
> collect2:ld returned 1 exit status
> As I can see, yylex() is defined in /flex-2.5.39/yylex.c, and "/usr/local/lib/libfl.so " is
> installed by flex "make install", why there are such errors,and how to resolve it?

As far as I understand, yylex() is the function genereted by flex, so
it is not provided by flex libraries themselves.
If you write <yourfile>.flex, and run it through flex, it generates
<yourfile>.c, which contains the function yylex(). You have to compile
that program, and link it to the final package.

Is it right?
-- 
Michele