[X2Go-Dev] improve Xinerama

[Mike Gabriel]

Hi Ulrich,

On  Fr 01 Mai 2015 13:39:42 CEST, Mike Gabriel wrote:

>> >> - xinerama is integrated into xrandr (in
>> >> programs/Xserver/randr/rrxinerama.c; the file I mentioned yesterday is
>> >> compiled and included, but not used apparently). Does hooking in there
>> >> produce any side effects? Currently clients asking nxagent for
>> >> xinerama info get the values from the real server but there are
>> >> internal structures that are not updated.
>> >
>> > Not sure about this without looking into the code any deeper. Basically,
>> > NoMachine also patched libXrandr heavily in an NX. Partially for  
>> backporting
>> > xrandr 1.2 proto version (IIRC), but possible also for some NX specific
>>
>> BTW: I think we really need at least xrandr 1.3. to be able to add
>> resolutions on the fly.
>
> Ok. I can take a look at that.

http://code.x2go.org/gitweb?p=nx-libs.git;a=commitdiff;h=15cee47a496ef891923949ade073cf4ffabb9c73

NoMachine actually did many changes on the Xserver's RandR extenion  
part (not on the library part as I erroneously remembered).

>>> [...]
>> [...]
> [...]

> At build time, dpkg-shlibdeps (or what's-its-name) indeed reports about
> unnecessarily linked libraries for nxagent. IIRC, libNX_Xinerama and
> libNX_Xrandr were among them.
>
> Let me check that later. It would mean that we can drop libNX_Xrandr
> immediately and that we only have to update the Xserver code itself.

"""
dpkg-shlibdeps: warning: package could avoid a useless dependency if  
debian/libnx-xcomposite1/usr/lib/x86_64-linux-gnu/libNX_Xcomposite.so.1.0 was  
not linked against libNX_Xext.so.6 (it uses none of the library's  
symbols)
dpkg-shlibdeps: warning: package could avoid a useless dependency if  
debian/libnx-xcomposite1/usr/lib/x86_64-linux-gnu/libNX_Xcomposite.so.1.0 was  
not linked against libNX_Xfixes.so.3 (it uses none of the library's  
symbols)
dpkg-shlibdeps: warning: package could avoid a useless dependency if  
debian/libnx-xcomposite1/usr/lib/x86_64-linux-gnu/libNX_Xcomposite.so.1.0 was  
not linked against libNX_Xdamage.so.1 (it uses none of the library's  
symbols)
dpkg-shlibdeps: warning: package could avoid a useless dependency if  
debian/libnx-xdamage1/usr/lib/x86_64-linux-gnu/libNX_Xdamage.so.1.0  
was not linked against libNX_Xext.so.6 (it uses none of the library's  
symbols)
dpkg-shlibdeps: warning: package could avoid a useless dependency if  
debian/libnx-xfixes3/usr/lib/x86_64-linux-gnu/libNX_Xfixes.so.3.0 was  
not linked against libNX_Xext.so.6 (it uses none of the library's  
symbols)
dpkg-shlibdeps: warning: package could avoid a useless dependency if  
debian/libnx-xrender1/usr/lib/x86_64-linux-gnu/libNX_Xrender.so.1.2.2  
was not linked against libNX_Xext.so.6 (it uses none of the library's  
symbols)
dpkg-shlibdeps: warning: package could avoid a useless dependency if  
debian/nxagent/usr/lib/nx/bin/nxagent was not linked against  
libNX_Xtst.so.6 (it uses none of the library's symbols)
dpkg-shlibdeps: warning: package could avoid a useless dependency if  
debian/nxagent/usr/lib/nx/bin/nxagent was not linked against  
libNX_Xinerama.so.1 (it uses none of the library's symbols)
dpkg-shlibdeps: warning: package could avoid a useless dependency if  
debian/nxagent/usr/lib/nx/bin/nxagent was not linked against  
libNX_Xdamage.so.1 (it uses none of the library's symbols)
dpkg-shlibdeps: warning: package could avoid a useless dependency if  
debian/nxagent/usr/lib/nx/bin/nxagent was not linked against  
libNX_Xrandr.so.2 (it uses none of the library's symbols)
dpkg-shlibdeps: warning: package could avoid a useless dependency if  
debian/nxproxy/usr/lib/nx/bin/nxproxy was not linked against  
libstdc++.so.6 (it uses none of the library's symbols)
dpkg-shlibdeps: warning: package could avoid a useless dependency if  
debian/nxproxy/usr/lib/nx/bin/nxproxy was not linked against  
libgcc_s.so.1 (it uses none of the library's symbols)
dpkg-shlibdeps: warning: package could avoid a useless dependency if  
debian/libxcomp3/usr/lib/x86_64-linux-gnu/libXcomp.so.3.5.99.0 was not  
linked against libgcc_s.so.1 (it uses none of the library's symbols)
dpkg-shlibdeps: warning: package could avoid a useless dependency if  
debian/libxcompext3/usr/lib/x86_64-linux-gnu/libXcompext.so.3.5.99.0  
was not linked against libgcc_s.so.1 (it uses none of the library's  
symbols)
dpkg-shlibdeps: warning: package could avoid a useless dependency if  
debian/libxcompext3/usr/lib/x86_64-linux-gnu/libXcompext.so.3.5.99.0  
was not linked against libstdc++.so.6 (it uses none of the library's  
symbols)
"""

So, yes, there is quite some internal over-linking in nx-libs.

I will fix that soon.

Mike


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