https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65536
--- Comment #25 from Manuel López-Ibáñez <manu at gcc dot gnu.org> --- (In reply to Jan Hubicka from comment #24) > Manuel, you may be right person to implement the streaming of linemaps then I have in fact considered it already, since I think it should be fairly easy and it can be done incrementally. However, as always in GCC, things are never as trivial as they seem. I just tried following https://gcc.gnu.org/wiki/DebuggingGCC#Debugging_LTO to see what dump_line_table_statistics reports before and after my patch above, but it doesn't print the lto1 invokation. The debugx scripts (https://gcc.gnu.org/ml/gcc/2004-03/msg01195.html) do not seem to work with lto1 (why those scripts are not in contrib/?). I feel like a new contributor again! :) Thus, sorry I don't really have the necessary free time to dedicate to this. I'm too busy with my real job at the moment. If/When I have time to dedicate to develop GCC, I will finish the transition of Fortran to the common diagnostics machinery, and then I will focus on C/C++ diagnostics. I still think that a patch similar to the one in comment #21 (+libcpp parts in comment #17) may improve the situation for GCC 5 and fix PR54962.
