Ytdyklly

I installed ImageMagick 7.0.8-11 Q16 x86_64 from source, and I didn't know that decode delegates are not automatically included when installing from source. I should have installed a binary of ImageMagick, which includes the jpeg decode delegate. The problem is that I can't uninstall ImageMagick because many other programs depend on it. So is there a way for me to install the jpeg decode delegate for the existing ImageMagick installation?

Relevant information:

Linux Mint 19 Tara 64bit.

apt-cache policy imagemagick

imagemagick:

Installed: (none)

Candidate: 8:6.9.7.4+dfsg-16ubuntu6.4

Version table:

8:6.9.7.4+dfsg-16ubuntu6.4 500

500 http://mirror.atlantic.net/ubuntu bionic-updates/main amd64 Packages

500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages

8:6.9.7.4+dfsg-16ubuntu6.3 -1

100 /var/lib/dpkg/status

8:6.9.7.4+dfsg-16ubuntu6 500

500 http://mirror.atlantic.net/ubuntu bionic/main amd64 Packages



identify -version

Version: ImageMagick 7.0.8-11 Q16 x86_64 2018-09-18 https://www.imagemagick.org

Copyright: © 1999-2018 ImageMagick Studio LLC

License: https://www.imagemagick.org/script/license.php

Features: Cipher DPC HDRI OpenMP

Delegates (built-in): fontconfig freetype png x zlib

Is this AskUbuntu post related to your issue? If so you can follow this advice:

Install JPEG Encoding Library

Following the information provided by user Samir Sabri in this AskUbuntu post, you will need to add the JPEG library.

I fixed the problem by installing from source the jpeg encoding library available at http://www.ijg.org/files/jpegsrc.v8c.tar.gz. (Latest JPEG Library can be found here.)

cd /usr/local/src

tar xvfz jpegsrc-v9c.tar.gz

cd jpegsrc.v9c

./configure --enable-shared --prefix=$CONFIGURE_PREFIX

make

sudo make install

Then I re-installed ImageMagick from source:

cd /usr/local/src

tar xvfz ImageMagick-[yourImagemagickVersion].tar.gz

cd ImageMagick-[yourImagemagickVersion]

export CPPFLAGS=-I/usr/local/include

export LDFLAGS=-L/usr/local/lib

./configure --prefix=/usr/local 

  --disable-static --with-modules 

  --without-perl 

  --without-magick-plus-plus 

  --with-quantum-depth=8 

  --disable-openmp

 make

 sudo make install

Substitute your options if necessary. You should be able to now use imagemagick to identify, encode, and decode jpeg files.

Uninstall and Reinstall

If the above post is not related or does not work the best course of action would be to uninstall imagemagick and install it again.

You can uninstall a package that you installed from source following the advice in this post by user Javier Rivera.

cd into the directory of the source package and run:

make uninstall

You may need root(sudo) permissions if that is how you built the package initially.

As user Javier Rivera points out, this will only work if the developer(s) of the source package have made uninstall scripts/rules. If they did not you will need to run make -n install to figure out the install steps and attempt to gracefully undo them.

You may also attempt to uninstall the package via dpkg by following the advice outlined in this post.

dpkg -r --force-depends foo

Will uninstall package foo while maintaining the packages that depend on foo. However this will create an unstable system. It would be advised to run apt-get -f install to help sort this out and pay attention to the output.

Looking at your apt-cache policy output you should be able to install a version of imagemagick from your repositories.

I recommend that you try to only install packages via your package manager. This makes it easier to manage your system and should work to avoid situations like this.

Please comment if you have any questions or issues with this answer. I highly suggest you read through each link I have provided thoroughly before attempting the commands. I appreciate feedback to correct any misconceptions and to improve my posts. I can update my answer as needed.

Best of Luck!