Martin, you've done everything well. Indeed, additional packages are needed for 
the successful compilation. They can be installed by the command 'sudo apt-get 
build-dep package_name' (there can be hefty pack, that's why I'm usually using 
virtual machine for the compilation and revert it to the last snapshot 
afterwards).
The size of the resulting library can be decreased by setting specific compiler 
options. If you examine Makefile which was created after './configure' has 
finished its work, you'll find CFLAGS string in it containing -g option (the 
level of debugging information) and -O2 option (optimization level). Disabling 
debugging information affects size of the resulting file but isn't advised 
(this may cause undesired results). Increasing optimization level will reduce 
the compiled file size (higher levels of optimisation also may cause undesired 
code behavior). Better leave it as it is. Those who perform packaging are 
better aware how this specific package should be compiled to ensure its minimal 
size for the distribution.

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You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xserver-xorg-video-nouveau in Ubuntu.
https://bugs.launchpad.net/bugs/1597437

Title:
  X with nouveau driver, 2 nvidia cards, 4 monitors, does not use all
  monitors

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