No rule to make target /usr/lib/libX11.so

[Amablue]

I'm writing a program using the library SFML, which requires libX11. I just recently upgraded to ubuntu 11.04 from an older version, and ever since I did I can't compile my program. I get the following error:


make[3]: *** No rule to make target `/usr/lib/libX11.so', needed by `lib/libsfml-window.so.2.0.0'. Stop.

I thought maybe that when I upgraded Ubuntu that package was uninstalled for some reason, but according to Synaptic, I have libX11-dev (I'm just assuming that's what I should be looking for, but I'm probably wrong).

Running `apt-get install libx11-dev` gives this output:


sudo apt-get install libx11-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
libx11-dev is already the newest version.
g++-4.4 libstdc++6-4.4-dev
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 32 not upgraded.

and running with the --reinstall flag gives this:


Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
g++-4.4 libstdc++6-4.4-dev
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 32 not upgraded.
Need to get 0 B/3,104 kB of archives.
After this operation, 0 B of additional disk space will be used.
(Reading database ... 279595 files and directories currently installed.)
Preparing to replace libx11-dev 2:1.4.2-1ubuntu3 (using .../libx11-dev_2%3a1.4.2-1ubuntu3_i386.deb) ...
Unpacking replacement libx11-dev ...
Processing triggers for man-db ...
Setting up libx11-dev (2:1.4.2-1ubuntu3) ...

[dwhitney67]

Have you checked to see if the file (symbolic link) /usr/lib/libX11.so exists?

[Amablue]

It does not.

There is a folder called X11 in /usr/lib/, but there is no libX11.so anywhere as far as I can tell.

[dwhitney67]

It does not.

There is a folder called X11 in /usr/lib/, but there is no libX11.so anywhere as far as I can tell.

Try installing it:


sudo apt-get install libx11-6

[Amablue]

Doing that didn't make any difference. Neither did adding --reinstall. There is still no libx11.so in my /usr/lib/ folder.


~$ ls /usr/lib/ |grep -i x11
libgdkglext-x11-1.0.so.0
libgdkglext-x11-1.0.so.0.0.0
libgdk-x11-2.0.so.0
libgdk-x11-2.0.so.0.2400.4
libgtkglext-x11-1.0.so.0
libgtkglext-x11-1.0.so.0.0.0
libgtk-x11-2.0.so.0
libgtk-x11-2.0.so.0.2400.4
libva-x11.so.1
libva-x11.so.1.0.8
X11

[gmargo]

libX11.so comes from the libx11-dev package.
But as you can see from the below link, it does not live in /usr/lib/.

http://packages.ubuntu.com/search?searchon=contents&keywords=libX11.so&mode=exactfilename&suite=natty&arch=any

It lives in one of these places (32-bit, 64-bit):
/usr/lib/i386-linux-gnu/libX11.so
/usr/lib/x86_64-linux-gnu/libX11.so

You can get the compile/link arguments from pkg-config:


$ pkg-config --libs x11
-L/usr/lib/x86_64-linux-gnu -lX11

[Amablue]

Did it formally live in /usr/lib/ or something? (or if not, what would have changed to cause this error to appear now but not before?)

(for the record, I haven't tried it yet, I'll try that as soon as I get home tonight)

[gmargo]

Did it formally live in /usr/lib/ or something?
Good question.

In fact, on 10.10 Maverick and 10.04 Lucid, it does live in /usr/lib/. It seems to have moved to the architecture specific directory as of 11.04 Natty.

Since you recently upgraded to Natty, was your SFML library built on Maverick or earlier? I think you need to reconfigure and rebuild the SFML library so that it's Natty compatible.