[Bug other/85716] No easy way for end-user to tell what GCC is doing when compilation is slow

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85716

--- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Another idea: maybe reuse the hierarchical logging support from libgccjit? 
(possibly with an option to add timestamps or somesuch).

See:
  https://gcc.gnu.org/onlinedocs/jit/internals/index.html#example-of-log-file