shared libraries

[rpeterson at yellowbank.com (Ron Peterson)]

Tom Guilderson wrote:
> 
> I have been trying to do some X windows programming. When i try
> to link against libX11 etc. I get errors such as the following:
> 
>         [TWGuilderson at linux1 mofif]gcc -o label label.c -lX11 -lXm
>         /usr/bin/ld: cannot open -lX11: No such file or directory
>         collect2: ld returned 1 exit status
> 
> This is my /etc/ld.so.conf file which I have run ldconfig against
> to insure the ld.so.cache is up to date
> 
>         /usr/X11R6/lib/
>         /usr/lib/
>         /usr/-486-linux-libc5/lib/
>         /usr/lib/qt-2.0.1/lib/
>         /usr/lib/qt-1.44/lib/
>         /usr/lesstif/lib/
> 
> If I run ldconfig -p I see libX11.so under /usr/X11R6/lib as well
> as libXm for motif under /usr/lesstif/lib.
> 
> If I am only linking against one of the libraries such as libX11
> I can pass the
> -L option such as
>         -L/usr/X11R6/lib/ -lX11
> and ld will find libX11. the problem is if I need libX11 and
> another library in another directory.  does anyone have any
> ideas. Has anyone else run into anything like this.
> 
> System is Redhat 6.1 on Intel, kernel 2.2.12-20
> 
> If anyone can offer any help it will be greatly appreciated.

Try 'ldconfig -v'.  This will reread /etc/ld.so.conf, which should be
read on boot, but you never do dunno, and sometimes you don't.

Ron Peterson
rpeterson at yellowbank.com
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