[Bug 1794911] Re: Enable --with-rsvg flag for graphviz package

[Raphaël Droz]

Still not fixed as of 20.04.3 (graphviz version 2.43.0)

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https://bugs.launchpad.net/bugs/1794911

Title:
  Enable --with-rsvg flag for graphviz package

Status in graphviz package in Ubuntu:
  New
Status in graphviz package in Debian:
  Fix Released

Bug description:
  I am trying to use animl library (https://github.com/parrt/animl) to
  visualize decision trees in Ubuntu artful and bionic. I am getting
  these errors while using this library:

  ```Warning: No loadimage plugin for "svg:cairo"```

  After some googling, `svg:cairo` plugin depends on `--with-rsvg` being
  enabled during compilation. But in both versions of graphviz, this
  flag is `--without-rsvg`. Can I request this flag to be enabled,
  please?

  On my bionic setup:
  ```
  graphviz:
    Installed: 2.40.1-2
    Candidate: 2.40.1-2
    Version table:
   *** 2.40.1-2 500
          500 http://gb.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
          100 /var/lib/dpkg/status
  ```
  On artful setup, I guess the version of the graphviz is `2.36`.

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