https://sourceware.org/bugzilla/show_bug.cgi?id=27387
Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |2.37
--- Comment #12 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Nick Clifton from comment #9)
> Hmmm, although this
> would not explain all of the mysterious .debug_macro.dwo sections.
I realize now what this is.
This is the work of optimize_macinfo_range in gcc/dwarf2.out.c:
...
/* Attempt to make a sequence of define/undef macinfo ops shareable with
other compilation unit .debug_macinfo sections. IDX is the first
index of a define/undef, return the number of ops that should be
emitted in a comdat .debug_macinfo section and emit
a DW_MACRO_import entry referencing it.
If the define/undef entry should be emitted normally, return 0. */
static unsigned
optimize_macinfo_range (unsigned int idx, vec<macinfo_entry, va_gc> *files,
macinfo_hash_type **macinfo_htab)
...
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