[Libreoffice] How to use gprof on LibO?

[Soeren Moeller]

Hi

In our effort of replacing deprecated data types from tools/ by std::
types we would like to use gprof for profiling (to choose the right
data types). But unfortunately, we don't know to set the -pg flag, and
where the gmon.out file would go. Has anyone of you experiences with
profiling LibO, and would like to tell us, how to do?

Best regards
Sören