https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78265
--- Comment #2 from David Blaikie <dblaikie at gmail dot com> ---
A side note/commentary:
Producing debug info for global variable declarations at all is an interesting
choice. If the whole program is built with debug info*, the global variable's
definition will have debug info and that should suffice, I think.
(* other optimizations in debug info that are the default for GCC make this
assumption (the vtable based class debug info optimization: struct foo {
virtual void f(); }; foo f; /* 'foo' emitted as a declaration here, a
definition wherever 'foo::f' is defined), so it would seem consistent to never
emit debug info for global variable declarations - with a flag to turn off this
assumption/optimization)
I mention this as it may make it easier to address this bug that way (though,
understandably, supporting the old behavior under a flag would be good and thus
this bug would still be an issue whenever that flag was used)
