I have ubuntu 16.04.4 LTS xenial and i want to install ceres, but not as static library. I want install it as shared library. I followed the instructions via this link: http://ceres-solver.org/installation.html, but when i add following commands sudo add-apt-repository ppa:bzindovic/suitesparse-bugfix-1319687 sudo apt-get update after update it shows me: ... Err:15 http://ppa.launchpad.net/bzindovic/suitesparse-bugfix-1319687/ubuntu xenial/main amd64 Packages 404 Not Found ... W: The repository 'http://ppa.launchpad.net/bzindovic/suitesparse-bugfix-1319687/ubuntu xenial Release' does not have a Release file. N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use. ... E: Some index files failed to download. They have been ignored, or old ones used instead.
I have amd, 64 bit, what i could do to install suitesparse (ceres) as a shared library. I dont want to reinstall ubuntu to older, newest version,...