[Bug debug/87362] GCC produces with LTO debug info with which gdb is not happy about

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87362

--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 44729
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44729&action=edit
patch

This avoids most of the forwarders (slightly hackish) and adds linkage names.

gdb startup is faster, more testing is in progress.