[Dev-C++] libraries

[Gregor P. <pe...@in...>]

Can tell me some one how to create a library file?

what's the difference between
	*.lib
	*.a
	*.o
-Files (exept of thier extension ;-) ?

Some time ago someone told me this all would be the same
To get a  *.a  from a  *.o-File  I just had to rename it?

My Problem is:
I have two precompiled Object-File  libyywrap.o   and  lex.yy.o
generatet by flex (a lexer generator) and sucsessfully copiled with
DevC++ 4.01  lex.yy.c / .o  contains a function named
	int yylex()
which I wanna use in a different project.

I think I have tried all possible (and impossible) Compiler and
Project-Options but DevC++ complains the would be a undefined reference
from gertswnd.c (the file I call yylex() from) to yylex :-(

this is the original error message:
gertswnd.o(.text+0x2659):gertswnd.c: undefined reference to `yylex(void)

would be thankful of any advice!