Makes `common::Mutex` an alias for `absl::Mutex` and replaces the logic inside `common::MutexLocker` with `absl::MutexLock`.
A future PR can then remove these classes entirely and replace references to it across the Cartographer code base with the Abseil classes directly.
@pifon2a I've noticed the `BUILD_COMMAND` is broken. You're setting `ABSL_BUILD_COMMAND`, but using `ABSEIL_BUILD_COMMAND` (effectively empty). Somehow this doesn't confuse newer CMakes, but the one you install on Trusty gets confused and interprets this as a no-op build step. This causes the indigo pipeline in cartographer_ros to fail.
Use the cross-platform build command instead:
https://cmake.org/cmake/help/latest/module/ExternalProject.html#obtaining-project-properties (just above the linked paragraph)
Handle case with multiple invocations (avoid pasting ${CMAKE_THREAD_LIBS_INIT} multiple times).
Also check if target 'gmock' already exists before building GMock to avoid failures if GMock was already
find_packaged() from another subproject.
FIXES=https://github.com/googlecartographer/cartographer_ros/issues/776
- Pin versions of Ceres and protobuf (Fixes#341).
- Require Lua >= 5.2 (Fixes#629).
- No longer run ceres tests in CI. We implicitly test Ceres through Cartographer's tests and this saves ~4 minutes on CI.
Alexander Belyaev
Arno Fleck
Juraj Oršulić
gaschler
Holger Rapp
Jochen Sprickerhof
Wolfgang Hess
Atsushi Watanabe
Damon Kohler