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Subject: RE: simple linking question
Date: Wed, 21 Apr 2004 15:50:00 -0000
Message-ID: <3F6F4712B759A34ABD453A8B39C10D62022B1C1A@bagman.edm.com>
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From: "Lev Assinovsky" <LAssinovsky@algorithm.aelita.com>
To: "Ramin NIkaeen" <Rnikaeen@goldline.net>,
	<gcc-help@gcc.gnu.org>
X-SW-Source: 2004-04/txt/msg00274.txt.bz2

I would advise to put -ljingjing after main.cpp:
g++ -o test.exe  -L/usr/lib -L/home/test   test.cpp -ljingjing
=20=20=20=20=20

----
Lev Assinovsky
Aelita Software Corporation=20
(now is a part of Quest Software)
O&S InTrust Framework Division, Team Leader
ICQ# 165072909


> -----Original Message-----
> From: Ramin NIkaeen [mailto:Rnikaeen@goldline.net]
> Sent: Wednesday, April 21, 2004 7:00 PM
> To: gcc-help@gcc.gnu.org
> Subject: simple linking question
>=20
>=20
>=20
> Friends,
>=20
> I am having linking problems with user-generated libraries on=20
> my Redhat 7.2
> using gcc-3.3.
>=20
> To demonstrate the problem, I created the following simple example:
>=20
> /*=20
> --------------------------------------------------------------
> --------------------------------------------------------------
> FILE: /home/test/jingjing.hpp
> --------------------------------------------------------------
> -------------------------------------------------------------- */
>=20
> #ifndef JINGJING_H
> #define JINGJING_H
>=20
> void jingjing();
>=20
> #endif
>=20
> /*=20
> --------------------------------------------------------------
> --------------------------------------------------------------
> FILE: /home/test/jingjing.cpp
> --------------------------------------------------------------
> -------------------------------------------------------------- */
> #include "jingjing.hpp"
> #include <stdio.h>
>=20
> void jingjing()
> {
>         fprintf(stderr, "jingjing invoked!\n");
> }
>=20
> /*=20
> --------------------------------------------------------------
> --------------------------------------------------------------
> FILE: test.cpp
> --------------------------------------------------------------
> -------------------------------------------------------------- */
> #include "jingjing.hpp"
>=20
> int main()
> {
>=20
>         jingjing();
>=20
>         return 0;
> }
>=20
> --------------------------------------------------------------
> -----------------------------------------------------------------
> compilation and linking
> --------------------------------------------------------------
> -----------------------------------------------------------------
> /home/test>g++ -g -O2 -c jingjing.cpp -o jingjing.o
> /home/test>ar cru libjingjing.a jingjing.o
> /home/test>ranlib libjingjing.a
> /home/test>chmod 755 *.o *.a
> /home/test>g++ -o test.exe  -L/usr/lib -L/home/test=20=20=20
> -ljingjing     test.cpp
>=20
> At the linking stage, when I execute the last command shown=20
> on the last line (g++ -o test.exe ....),
> I get the following error:
> --------------------------------------------------------------
> -----------------------------------------------------------------
> /tmp/ccuw3cNo.o: In function `main':
> /tmp/ccuw3cNo.o(.text+0x11): undefined reference to `jingjing()'
> collect2: ld returned 1 exit status
> --------------------------------------------------------------
> -----------------------------------------------------------------
>=20
> when I try=20
> 	/home/test>g++ jingjing.o test.cpp
> it generates the executable properly.
>=20
> but when I try=20=20
> 	/home/test>g++ libjingjing.a test.cpp
> I get the same error.
>=20
> Can someone tell me what is wrong?!
>=20
>=20
> thanks so much
>=20
> ramin
>=20
>=20
>=20
>=20