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Mono | Ubuntu Broken Packages

I do not normally use a Linux Desktop, more of a CLI kind-of guy, but in trying to support some C# projects that are using MonoDevelop, I needed to get the beta/alpha Mono builds installed… It turns out to be a P.I.T.A. to do it from packages and not source.

Broken packages always seem to be a problem when dealing with pre-built Linux software and I usually build from source so I do not see them, but installing the mono-devel package fails due to libjpeg62-turbo and libjpeg62 not being avialable in the normal Ubuntu repos. They have been replaced by bundle 8 of libraries but libgdiplus that Mono references is pinned to libjpeg6* packages…

So the errors:

sudo apt-get install mono-devel

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The following packages have unmet dependencies:
 mono-devel : Depends: libgdiplus (>= 2.6.7) but it is not going to be installed
              Depends: libmono-system-design4.0-cil (>= 1.0) but it is not going to be installed
              Depends: libmono-system-drawing4.0-cil (>= 3.0.6) but it is not going to be installed
              Depends: libmono-system-messaging4.0-cil (>= 2.10.1) but it is not going to be installed
              Depends: libmono-system-runtime4.0-cil (>= 2.10.1) but it is not going to be installed
              Depends: libmono-system-servicemodel-activation4.0-cil (>= 1.0) but it is not going to be installed
              Depends: libmono-system-servicemodel-web4.0-cil (>= 3.2.1) but it is not going to be installed
              Depends: libmono-system-servicemodel4.0a-cil (>= 3.2.3) but it is not going to be installed
              Depends: libmono-system-web-extensions4.0-cil (>= 2.10.3) but it is not going to be installed
              Depends: libmono-system-web-services4.0-cil (>= 1.0) but it is not going to be installed
              Depends: libmono-system-web4.0-cil (>= 2.10.3) but it is not going to be installed
              Depends: libmono-system-windows-forms4.0-cil (>= 1.0) but it is not going to be installed
              Depends: libmono-cil-dev (= 4.2.1.91-0xamarin1) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
sudo apt-get install libgdiplus

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Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
libgdiplus : Depends: libjpeg62-turbo (>= 1.3.1) but it is not installable
E: Unable to correct problems, you have held broken packages.
sudo apt-get install libjpeg62-turbo

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Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package libjpeg62-turbo is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or is only available from another source E: 
Package 'libjpeg62-turbo' has no installation candidate

The Fix:

Get the older libjpeg62-turbo package:

libjpeg62-turbo - libjpeg-turbo JPEG runtime library

 wget http://ftp.br.debian.org/debian/pool/main/libj/libjpeg-turbo/libjpeg62-turbo_1.4.1-2_amd64.deb

Get the older libjpeg62 package:

libjpeg62 - Independent JPEG Group’s JPEG runtime library (version 6.2)

 wget http://ftp.br.debian.org/debian/pool/main/libj/libjpeg6b/libjpeg62_6b2-2_amd64.deb

Install the deb packages:

sudo dpkg --install --recursive --auto-deconfigure libjpeg62-turbo_1.4.1-2_amd64.deb

Update and fix the ‘now broken’ dependencies:

apt-get update
sudo apt-get -f install

Finally, install mono (and monodevelop) from package:

sudo apt-get install mono-devel
sudo apt-get isntall monodevelop

Ahhh, mono 4.2.1 is now installed:

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mono --version
Mono JIT compiler version 4.2.1 (Stable 4.2.1.91/8862921 Fri Oct 30 17:04:13 UTC 2015)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
  TLS:           __thread
  SIGSEGV:       altstack
  Notifications: epoll
  Architecture:  amd64
  Disabled:      none
  Misc:          softdebug 
  LLVM:          supported, not enabled.
  GC:            sgen

Almost would be easier to install from source ;-)

Have fun.

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