Only use LTO when compiling Ceres itself, not tests or examples.

- If Ceres is built as a shared library, and LTO is enabled for Ceres
  and the tests, then type_info::operator==() incorrectly returns false
  in gtests' CheckedDowncastToActualType() in the following tests:
-- levenberg_marquardt_strategy_test.
-- gradient_checking_cost_function_test.
  on at least Xcode 6 & 7 as reported here:
- This does not appear to be a gtest issue, but is perhaps an LLVM bug
  or an RTTI shared library issue.  Either way, disabling the use of
  LTO when compiling the test application resolves the issue.
- Allow LTO to be enabled for GCC, if it is supported.
- Add CMake function to allow easy appending to target properties s/t
  Ceres library-specific compile flags can be iteratively constructed.

Change-Id: I923e6aae4f7cefa098cf32b2f8fc19389e7918c9
4 files changed
tree: bdfe9a96a9e8e4b3971e0fb094d25a7a0a188634
  1. cmake/
  2. config/
  3. data/
  4. docs/
  5. examples/
  6. include/
  7. internal/
  8. jni/
  9. scripts/
  10. .gitignore
  11. CMakeLists.txt
  13. README.md

Ceres Solver - A non-linear least squares minimizer

Please see ceres-solver.org for more information.

WARNING - Do not make GitHub pull requests!

Ceres development happens on Gerrit, including both repository hosting and code reviews. The GitHub Repository is a continuously updated mirror which is primarily meant for issue tracking. Please see our Contributing to Ceres Guide for more details.

The upstream Gerrit repository is