MinGW gcc error: "undefined reference to `yylloc'"

Where can I find yylloc? I have included libfl.a (-lfl) in gcc command line, added GnuWin32/bin and GnuWin32/lib directories to system variable LIB, searched through all files in GnuWin32 - neither I nor开发者_运维知识库 gcc can find it.

It's Bison variable, it cannot be used without Bison-generated .c file.