how to find out the linker flags used while building a library

[the-shank]

I can get the compilation database by running b2 with bear.

I was wondering how can I find out the linker options used when building a shared library (for example libboost_filesystem.so). Is there a way to emit the compilation/linking commands when using b2?

[grafikrobot]

You can use the -d2 option (see https://www.bfgroup.xyz/b2/manual/release/index.html#bbv2.overview.invocation.options) to display the commands that are executed. If you want the commands without actually executing them you can also use the -n option.