Anssi Hannula wrote:
> Steve Morris wrote:
>  
>> Colin Guthrie wrote:
>>  
>>> Steve Morris wrote:
>>>    
>>>> I have now run ldconfig (I have never had to run this in the past for
>>>> dependent processes to pick up the update-alternatives changes, so I
>>>> don't understand why I need to now),
>>>>      
>>> FYI it's not related to calling update-alternatives generally, but in
>>> this case the alternative affects a file in /etc/ld.so.conf.d/ which
>>> in turn affects the library search path. That's why ldconfig is needed
>>> in this case.
>>>    
>> I don't understand why this is the case. With the module path entries I
>> had in Xorg.conf Xorg was loading
>> /usr/lib/xorg/modules/extensions/nvidia-current/libglx.so which is a
>> link to libglx.so.173.08 in the same directory. Without these module
>> paths Xorg's default functioniality is to load
>> /usr/lib/xorg/modules/extensions/libglx.so with is a link to
>> /etc/alternatives/libglx with is a link to
>> /usr/lib/xorg/modules/extensions/nvidia-current/libglx.so which is a
>> link to libglx.so.173.08 in the same directory. So how does
>> /usr/lib/nvidia-current as specified by ldconfig get into the picture?
>>  
>
> libglx.so depends on libGLcore.so.1 and libnvidia-tls.so.1, that are in
> /usr/lib/nvidia-current:
>
> $ ldd /usr/lib64/xorg/modules/extensions/nvidia-current/libglx.so
>      linux-vdso.so.1 => (0x00007fffb03fe000)
>      libGLcore.so.1 => /usr/lib64/nvidia-current/libGLcore.so.1
> (0x00002b64faa41000)
>      libnvidia-tls.so.1 =>
> /usr/lib64/nvidia-current/tls/libnvidia-tls.so.1 (0x00002b64fb5f9000)
>      libc.so.6 => /lib64/libc.so.6 (0x00002b64fb6fa000)
>      /lib64/ld-linux-x86-64.so.2 (0x0000555555554000)
>
>
>  
I have one more question before I let this rest. When the ldd is issued
against libglx.so is it really listing the dependencies, in this case,
of libglx.so.173.08, as I don't understand how a symlink can have
dependencies as it is only a pointer isn't it?

regards,
Steve

>> It was all this circular link chaining that caused me to put the
>> modulepath statements in xorg.conf to go straight to the correct libglx
>> module.
>>
>>