apt-get install libglib1.2-dev
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  libmpeg3-1
Use 'apt-get autoremove' to remove them.
The following NEW packages will be installed:
  libglib1.2-dev
0 upgraded, 1 newly installed, 0 to remove and 26 not upgraded.
Need to get 176kB of archives.
After unpacking 573kB of additional disk space will be used.
Get:1 http://ftp.fr.debian.org lenny/main libglib1.2-dev 1.2.10-19 [176kB]
Fetched 176kB in 1s (96.3kB/s)         
Gtk-WARNING **: Unable to locate theme engine in module_path: "experience", at /usr/share/perl5/Debconf/FrontEnd/Gnome.pm line 68, <> line 1.
Selecting previously deselected package libglib1.2-dev.
(Reading database ... 93473 files and directories currently installed.)
Unpacking libglib1.2-dev (from .../libglib1.2-dev_1.2.10-19_i386.deb) ...
Setting up libglib1.2-dev (1.2.10-19) ...