Remove link-time optimisation (LTO).

- On GCC 4.9+ although GCC supports LTO, it requires use of the
  non-default gcc-ar & gcc-ranlib.  Whilst we can ensure Ceres is
  compiled with these, doing so with GCC 4.9 causes multiple definition
  linker errors of static ints inside Eigen when compiling the tests
  and examples when they are not also built with LTO.
- On OS X (Xcode 6 & 7) after the latest update to gtest, if LTO
  is used when compiling the tests (& examples), two tests fail
  due to typeinfo::operator== (things are fine if only Ceres itself is
  compiled with LTO).
- This patch disables LTO for all compilers. It should be revisited when
  the performance is more stable across our supported compilers.

Change-Id: I17b52957faefbdeff0aa40846dc9b342db1b02e3
2 files changed
tree: b2a6e88cb99912575a5a2f0820c460a2d54b2a99
  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