ubuntu@ubuntu:~$ sudo apt autoremove --purge libsdl1.2-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
  libappindicator1* libcaca-dev* libindicator7* libpng12-dev* libsdl1.2-dev*
  libsdl1.2debian* libslang2-dev*
0 upgraded, 0 newly installed, 7 to remove and 94 not upgraded.
1 not fully installed or removed.
Need to get 0 B/290 kB of archives.
After this operation, 9,260 kB disk space will be freed.
Do you want to continue? [Y/n] Y
(Reading database ... 197230 files and directories currently installed.)
Removing libappindicator1 (12.10.1+15.04.20141110-0ubuntu1) ...
Purging configuration files for libappindicator1 (12.10.1+15.04.20141110-0ubuntu1) ...
Removing libsdl1.2-dev (1.2.15+dfsg1-3) ...
Removing libcaca-dev (0.99.beta19-2build2~gcc5.2) ...
Removing libindicator7 (12.10.2+16.04.20151208-0ubuntu1) ...
Removing libslang2-dev:amd64 (2.3.0-2ubuntu1) ...
Removing libpng12-dev:amd64 (1.2.54-1ubuntu1) ...
Removing libsdl1.2debian:amd64 (1.2.15+dfsg1-3) ...
Processing triggers for libc-bin (2.23-0ubuntu3) ...
Processing triggers for man-db (2.7.5-1) ...
Processing triggers for doc-base (0.10.7) ...
Processing 1 removed doc-base file...
dpkg: error processing package network-manager-gnome (--configure):
 package network-manager-gnome is not ready for configuration
 cannot configure (current status 'half-installed')
Errors were encountered while processing:
 network-manager-gnome
E: Sub-process /usr/bin/dpkg returned an error code (1)
ubuntu@ubuntu:~$ sudo apt install libsdl1.2-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  libcaca-dev libpng12-dev libsdl1.2debian libslang2-dev
The following NEW packages will be installed:
  libcaca-dev libpng12-dev libsdl1.2-dev libsdl1.2debian libslang2-dev
0 upgraded, 5 newly installed, 0 to remove and 94 not upgraded.
1 not fully installed or removed.
Need to get 0 B/2,450 kB of archives.
After this operation, 9,076 kB of additional disk space will be used.
Do you want to continue? [Y/n] Y
Selecting previously unselected package libpng12-dev:amd64.
(Reading database ... 196290 files and directories currently installed.)
Preparing to unpack .../libpng12-dev_1.2.54-1ubuntu1_amd64.deb ...
Unpacking libpng12-dev:amd64 (1.2.54-1ubuntu1) ...
Selecting previously unselected package libslang2-dev:amd64.
Preparing to unpack .../libslang2-dev_2.3.0-2ubuntu1_amd64.deb ...
Unpacking libslang2-dev:amd64 (2.3.0-2ubuntu1) ...
Selecting previously unselected package libcaca-dev.
Preparing to unpack .../libcaca-dev_0.99.beta19-2build2~gcc5.2_amd64.deb ...
Unpacking libcaca-dev (0.99.beta19-2build2~gcc5.2) ...
Selecting previously unselected package libsdl1.2debian:amd64.
Preparing to unpack .../libsdl1.2debian_1.2.15+dfsg1-3_amd64.deb ...
Unpacking libsdl1.2debian:amd64 (1.2.15+dfsg1-3) ...
Selecting previously unselected package libsdl1.2-dev.
Preparing to unpack .../libsdl1.2-dev_1.2.15+dfsg1-3_amd64.deb ...
Unpacking libsdl1.2-dev (1.2.15+dfsg1-3) ...
Processing triggers for man-db (2.7.5-1) ...
Processing triggers for libc-bin (2.23-0ubuntu3) ...
Processing triggers for doc-base (0.10.7) ...
Processing 1 added doc-base file...
dpkg: error processing package network-manager-gnome (--configure):
 package network-manager-gnome is not ready for configuration
 cannot configure (current status 'half-installed')
Setting up libpng12-dev:amd64 (1.2.54-1ubuntu1) ...
Setting up libslang2-dev:amd64 (2.3.0-2ubuntu1) ...
Setting up libcaca-dev (0.99.beta19-2build2~gcc5.2) ...
Setting up libsdl1.2debian:amd64 (1.2.15+dfsg1-3) ...
Setting up libsdl1.2-dev (1.2.15+dfsg1-3) ...
Processing triggers for libc-bin (2.23-0ubuntu3) ...
Errors were encountered while processing:
 network-manager-gnome
E: Sub-process /usr/bin/dpkg returned an error code (1)