[ros-noetic-mavros] error: ‘shared_mutex’ in namespace ‘std’ does not name a type

This is just to let know people if they come back here how to workaround the problem.

You should get an error like this:

make[2]: *** [CMakeFiles/tf.dir/build.make:118: CMakeFiles/tf.dir/src/transform_listener.cpp.o] Error 1
In file included from /usr/include/log4cxx/log4cxx.h:45,
from /usr/include/log4cxx/logstring.h:28,
from /usr/include/log4cxx/level.h:22,
from /opt/ros/noetic/include/ros/console.h:46,
from /opt/ros/noetic/include/ros/ros.h:40,
from /tmp/makepkg/ros-noetic-tf/src/geometry-1.13.2/tf/src/transform_broadcaster.cpp:34:
/usr/include/log4cxx/boost-std-configuration.h:10:18: error: ‘shared_mutex’ in namespace ‘std’ does not name a type
10 | typedef std::shared_mutex shared_mutex;
| ^~~~~~~~~~~~
/usr/include/log4cxx/boost-std-configuration.h:10:13: note: ‘std::shared_mutex’ is only available from C++17 onwards
10 | typedef std::shared_mutex shared_mutex;
| ^~~
/usr/include/log4cxx/boost-std-configuration.h:12:30: error: ‘shared_lock’ in namespace ‘std’ does not name a template type
12 | using shared_lock = std::shared_lock<T>;
| ^~~~~~~~~~~
/usr/include/log4cxx/boost-std-configuration.h:12:25: note: ‘std::shared_lock’ is only available from C++14 onwards
12 | using shared_lock = std::shared_lock<T>;
| ^~~
In file included from /opt/ros/noetic/include/ros/console.h:46,
from /opt/ros/noetic/include/ros/ros.h:40,
from /tmp/makepkg/ros-noetic-tf/src/geometry-1.13.2/tf/src/transform_broadcaster.cpp:34:
/usr/include/log4cxx/level.h:283:29: error: ‘mutex’ in namespace ‘std’ does not name a type
283 | static std::mutex initMutex;
| ^~~~~
/usr/include/log4cxx/level.h:25:1: note: ‘std::mutex’ is defined in header ‘<mutex>’; did you forget to ‘#include <mutex>’?
24 | #include <log4cxx/helpers/object.h>
+++ |+#include <mutex>
25 |

My google-fu managed to find this same error in the archlinux repository: https://bugs.archlinux.org/task/71847 Their proposed solution is to modify /usr/include/log4cxx/boost-std-configuration.h, from this:

#define STD_SHARED_MUTEX_FOUND 1
#define Boost_SHARED_MUTEX_FOUND 0

to this:

#define STD_SHARED_MUTEX_FOUND 0
#define Boost_SHARED_MUTEX_FOUND 1

Which it works Also according to the tracker, this should be resolved upstream, but I guess the build hasn't made it to the arch repository yet, so this should be a temporary fix and should be fixed whenever the log4cxx is updated.

acxz / pkgbuilds

[ros-noetic-mavros] error: ‘shared_mutex’ in namespace ‘std’ does not name a type #148