Gazebo depends on Ilibignition-math3-dev and libignition-transport3-dev.
However, libignition-transport3-dev depends on libignition-msgs-dev, which depends on libignition-math2-dev, which depends on libignition-math2. Installing libignition-math2 seems to uninstall Ilibignition-math3, which Ilibignition-math3-dev depends on.
In short Ilibignition-math3-dev depends on Ilibignition-math3, while libignition-transport3-dev depends on Ilibignition-math2. Unfortunately Ilibignition-math3 and Ilibignition-math2 are mutually exclusive.
One last thing: I'm on Ubuntu 14.04. Thanks.
# UPDATE
I downloaded the source using the following command:
hg clone https://bitbucket.org/osrf/gazebo /tmp/gazebo
I'm a little unfamiliar with bitbucket, and but I didn't find any information about the version on the site or in the source code directory.
I have reviewed the question that you linked to. I did try running:
sudo apt remove '.*gazebo.*' '.*sdformat.*' '.*ignition-.*'
but the problem persisted.
My evidence that libignition-msgs-dev depends on libignition-math2-dev is as follows:
~/gazebo
❯ sudo apt-get install libignition-msgs-dev
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:
libignition-msgs-dev : Depends: libignition-math2-dev but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
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