CMake to Bazel question about boost::asio::detail::posix_signal_blocker

[ephsiung]

A CMake novice here so maybe the answer is obvious but I've been staring at the code and don't see it.

So I need to build vsomeip using Bazel, and I have a working solution except that I had to patch one thing.

implementation/runtime/src/application_impl.cpp references boost::asio::detail::posix_signal_blocker but this fails to build with error: no type named 'posix_signal_blocker' in namespace 'boost::asio::detail'.

I can add #include <boost/asio/detail/signal_blocker.hpp> to get around this, but I'd like to understand how this builds under CMake. Can anybody explain?