[Bug bootstrap/98860] [11 Regression] bootstrap failure on MinGW-w64 windows 10

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98860

--- Comment #42 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
As a start, perhaps compiling
void
foo (void)
{
  int a = 1;
  asm ("nop");
  a = 2;
  asm ("nop");
  a = 3;
}
with -gdwarf-5 -O2 -dA to get the assembly.  But bet it can be reduced manually
somewhat, it would e.g. just drop the function altogether and in .debug_info
have just DW_TAG_compile_unit DIE with its attributes and drop
DW_TAG_subprogram etc., and only have DW_AT_ranges on it that points to minimal
.debug_rnglists.
Or keep the DW_TAG_subprogram in there but just say the ranges and nothing else
for it.
But if it needs to cover both 64-bit and 32-bit assembly for PE, either you
need two sets of assembly in the configure or tweak it by hand.
You can have a look e.g. at what the HAVE_AS_WORKING_DWARF_N_FLAG testing uses
as assembly as an example.