Use glfags target

Update the usage of Google Flags (gflags) library the same way Glog
updated it [1]. This pushes the minimum required gflags version to
v2.2.0.

Remove the ceres specific define of CERES_GFLAGS_NAMESPACE and directly
use GFLAGS_NAMESPACE defined in gflags/gflags_declare.h [2].

In CeresConfig.cmake the hard coded paths for gflags are ommited.
Instead we rely on the gflagsConfig file to get closer to a relocatable
CeresConfig.cmake.
Furthermore use the find_dependency() [4] cmake function specifically
created for cmake-config files.

This change builds upon the explicit PUBLIC/PRIVATE link change [3].

[1] https://github.com/google/glog/pull/199
[2] https://github.com/gflags/gflags/blob/d9b184bd0026b16bb4c2fded75d56fb2cce50d66/src/gflags_declare.h.in#L43
[3] https://ceres-solver-review.googlesource.com/c/ceres-solver/+/16220
[4] https://cmake.org/cmake/help/latest/module/CMakeFindDependencyMacro.html

Change-Id: I9861a2699f2702bf1a5e99d07863a7e6639b7c39
16 files changed
tree: 2b9dffc45ccd7e6004b8c9678fc306fab3a471f2
  1. bazel/
  2. cmake/
  3. config/
  4. data/
  5. docs/
  6. examples/
  7. include/
  8. internal/
  9. scripts/
  10. travis/
  11. .clang-format
  12. .gitignore
  13. .travis.yml
  14. BUILD
  15. CMakeLists.txt
  16. CONTRIBUTING.md
  17. LICENSE
  18. package.xml
  19. README.md
  20. WORKSPACE
README.md

Build Status

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 ceres-solver.org for more information.