[C++] Unexpected Boost components built and bundled

[pitrou]

Describe the bug, including details regarding any error messages, version, and platform.

On the C++ Windows GHA build, I see unexpected boost components being built, for example:

[77/754] Building CXX object _deps\boost-build\libs\container\CMakeFiles\boost_container.dir\src\dlmalloc.cpp.obj
[78/754] Building C object _deps\boost-build\libs\container\CMakeFiles\boost_container.dir\src\alloc_lib.c.obj
[80/754] Building CXX object _deps\boost-build\libs\container\CMakeFiles\boost_container.dir\src\monotonic_buffer_resource.cpp.obj
[81/754] Building CXX object _deps\boost-build\libs\container\CMakeFiles\boost_container.dir\src\global_resource.cpp.obj
[82/754] Building CXX object _deps\boost-build\libs\container\CMakeFiles\boost_container.dir\src\pool_resource.cpp.obj
[84/754] Building CXX object _deps\boost-build\libs\container\CMakeFiles\boost_container.dir\src\synchronized_pool_resource.cpp.obj
[86/754] Building CXX object _deps\boost-build\libs\container\CMakeFiles\boost_container.dir\src\unsynchronized_pool_resource.cpp.obj

We're not using those anywhere, and I doubt that boost::process relies on it?

https://github.com/apache/arrow/actions/runs/18777437953/job/53575210350#step:11:1120

Component(s)

C++, Continuous Integration

[pitrou]

@kou