Conflicts with google ceres solver due to clang libc++/ and libunwind-dev from google-glog

[EwingKang]

I find it impossible to install both Ceres solver and Open3D at the same time. I'm build both from source.
The source seems to be related to the conflicts between libc++-dev required by Open3D, and [libunwind-dev] required by libgoogle-glog-dev, required by Ceres. Seems like libc++-dev installs libunwind-14-dev, which conflicts with the install.
I've seen similar questions with LLVM install and in Ubuntu Bug report.

Does anyone has any suggestion on how to work around the issue? I think it's a very common scenario to use a non-linear solver along with Open3D

[EwingKang]

To those having the same problem, I ended up building the google log from source, and rebuilt Ceres with that installed.
So the general steps for me is:

• Install the dependencies for Open3D
• Clone and build Open3D
• Install the dependencies for google Ceres except libgoogle-glog-dev
• Clone, build, and install glog from source
• Clone, build, and install Ceres from source
• Build my project with both libraries. Using find_package in CMakeLists.txt

[EwingKang]

I mark this as an answer but it's more like a workaround. To admins: please help change it if it's not appropriate for you.