libgd2

naama@virtual:~/cxgn/sgn$ sudo aptitude install libgd2-noxpm-dev
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Reading extended state information      
Initializing package states... Done
Reading task descriptions... Done  
The following packages are BROKEN:
  libfreetype6-dev libgd2-noxpm-dev libpng12-dev 
0 packages upgraded, 3 newly installed, 0 to remove and 0 not upgraded.
Need to get 1289kB of archives. After unpacking 4878kB will be used.
The following packages have unmet dependencies:
  libpng12-dev: Depends: zlib1g-dev which is a virtual package.
  libfreetype6-dev: Depends: zlib1g-dev which is a virtual package. or
                             libz-dev which is a virtual package.
  libgd2-noxpm-dev: Depends: libjpeg62-dev which is a virtual package.
                    Depends: zlib1g-dev which is a virtual package.
Unable to resolve dependencies!  Giving up...
The following packages are BROKEN:
  libfreetype6-dev libgd2-noxpm-dev libpng12-dev 
0 packages upgraded, 3 newly installed, 0 to remove and 0 not upgraded.
Need to get 1289kB of archives. After unpacking 4878kB will be used.
aptitude failed to find a solution to these dependencies.  You can solve them yourself by hand or type 'n' to quit.
The following packages have unmet dependencies:
  libpng12-dev: Depends: zlib1g-dev which is a virtual package.
  libfreetype6-dev: Depends: zlib1g-dev which is a virtual package. or
                             libz-dev which is a virtual package.
  libgd2-noxpm-dev: Depends: libjpeg62-dev which is a virtual package.
                    Depends: zlib1g-dev which is a virtual package.
Resolve these dependencies by hand? [N/+/-/_/:/?] 
Abort.