[Flex-help] undefined reference to 'yylex'

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

Hi all:
To make my xsupplicant(1.2.8) works, I had flex-2.5.39,openssl,wireless_tools and bison-3.0 installed.
But there are errors when I try (xsupplicant) make ,it says:
/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?


Thanks alot!