g++ : ld cannot find -lX11
 

Hey I have what I think would be an easy question:

This compiles :

g++ someprog.cpp -L/usr/X11/lib -lX11

but this :

g++ someprog.cpp -lX11

gives an error (ld cannot find -lX11)

I thought if I put /usr/X11/lib/ into /etc/ld.so.conf then I wouldn't need to add the -L/usr/X11/lib/ all the time. What do I need to do to put that directory into the library search path?

Thanks!

p.s. I'm using Slackware 10.0 and the glibs have all been updated (using slackpkg)

What happens when you don't add the -lX11? I've had makefiles fail with that, but if I remove the piece then it compiles fine.

Did you run 'ldconfig' after making changes in /etc/ld.so.conf ?

Hey, htanks for the help.

I didn't run ldconfig, but did after reading your post.

It still give me the same error (cannot find -lX11) when I compile with :

g++ somefile.cpp -lX11


And when I compile without any options like so :

g++ somefile.cpp

I get

/tmp/ccAAgcot.o(.text+0x19): In function `main':
: undefined reference to `XOpenDisplay'
/tmp/ccAAgcot.o(.text+0x66): In function `main':
: undefined reference to `XCloseDisplay'



This is my ld.conf :

usr/X11/
/usr/X11/lib/
/usr/local/lib
/usr/X11R6/lib/
/usr/i486-slackware-linux/lib
/opt/kde/lib
/usr/lib/qt/lib
/usr/lib/mozilla-1.6
/usr/lib/mozilla-1.4

Try remove :
usr/X11/
/usr/X11/lib/

from /etc/ld.so.conf and run ldconfig to see...
(the official lib dir for X11 in slackware is : /usr/X11R6/lib)

OK, removed the dirs from ld.so.conf, reran ldconfig as root and still getting the same things.

This is really strange. Maybe this will help:

This is the exact error. Is it set up right?

/usr/lib/gcc-lib/i486-slackware-linux/3.3.4/../../../../i486-slackware-linux/bin/ld: cannot find -lX11
collect2: ld returned 1 exit status