Link against threading library only if necessary

1. The platform specific threads library is only needed if we actually
   use threads. In this case, the library is not optional opposed to
   previous logic.
2. Do not hide the find module output to allow the user to understand
   what happens in case of a CMake failure to locate Threads.
3. Finally, Threads is private dependency that does need to be
   propagated to consumers unless Ceres was compiled as a static

Change-Id: I8d9d9cd42930e1ed234f69a2dba70d0ee2755b4e
2 files changed
tree: 3203956361172f3363765922034f96ae319b9fc0
  1. .github/
  2. bazel/
  3. cmake/
  4. config/
  5. data/
  6. docs/
  7. examples/
  8. include/
  9. internal/
  10. scripts/
  11. .clang-format
  12. .gitignore
  13. BUILD
  14. CITATION.cff
  15. CMakeLists.txt
  18. package.xml

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Ceres Solver

Ceres Solver is an open source C++ library for modeling and solving large, complicated optimization problems. It is a feature rich, mature and performant library which has been used in production at Google since 2010. Ceres Solver can solve two kinds of problems.

  1. Non-linear Least Squares problems with bounds constraints.
  2. General unconstrained optimization problems.

Please see for more information.