RE: X Programming prob...

[Shashank Banerjee <shashankb@xxxxxxxxxxx>]

Karthik,

Well the problem here is on unreferenced functions which means that the
libraries have not been referenced.

When you use the -l (small letter 'L') option, you specify the library
to use. While with -L (capital letter L) you give the path, where this
library is to be found.

Even though you have specified the path correctly in the second case
with the use of -L (which is partially correct), you have not specified
the library to be used while linking.

So this is how you go about it...

$ gcc -L /usr/X11R6/lib -l X11 -l Xmu -l Xt -g -I /usr/include -o Xhello
Xhello.c

(Note: The the symbols before X11, Xmu and Xt are small caps 'L' not
large caps 'i'  and before /usr/include is large caps - 'i' )

Regards,
__________________________________________________________________
Shashank Banerjee
Software Consultant, Communications Division
DCM Data Systems
Vikrant Towers, 4, Rajendra Place, NEW DELHI - 110 008, INDIA
Ph: +91-11-5719967-76/E-mail: shashankb@xxxxxxxxxxx
Web Site: http://www.dcmds.com


>-----Original Message-----
>From:	Karthik K H [SMTP:karthik_kh@xxxxxxxxxxxx]
>Sent:	Tuesday, June 22, 1999 1:57 AM
>To:	linux-india@xxxxxxxxx
>Subject:	X Programming prob...
>
>HI ,
>    I am facing a problem ( which I think maybe specific to Linux ).
> I have written a simple X Windows program to test my new installation
>of RHL5.2 
>When I try to compile it with
>"gcc -g -I/usr/include -I/usr/X11R6/include 
>-l/usr/X11R6/lib/Xt -l/usr/X11R6/lib/Xmu 
>-l/usr/X11R6/lib/X11 XHello.c "
>
>I get an error saying "ld cannot open file /usr.../Xt
>though the lib files are present there.
>
>How ever when i replace all the "-l" options with a single one like
>"-L/usr/X11R6/lib" 
>I get the following message
>"/tmp/cca005521.o : In function main
>/tmp/cca005521.o(.text+0x9): 
>            Undefined reference to XOpenDisplay 
>            Undefined reference to XCreateWindow
>             Undefined reference to XCreateGC .....
>    and so on.
>
>But the whole thing works perfectly well with the same commands on
>AIX/Solaris with out change.
>
>Though I have written a lotta X pgms earlier I have not faced this
>problem.
>Can anyone check out on this ?
>My directory locations are pretty much default.
>/usr/include
>/usr/lib
>/usr/X11R6/include
>/usr/X11R6/lib
>
>cheers,
>Karthik K H
>
>
>
>
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