Hi,

attached testcase targets the difference of `struct x;' vs. `struct {} x;' by checking
the DWARF flag `DW_AT_declaration':
# DWARF3: An incomplete structure, union or class type is represented by
# a structure, union or class entry that does not have a byte size attribute
# and that has a DW_AT_declaration attribute.

The attachment then fixes GDB to make the testcase pass.

Patch goes the regression-safe way by introducing OBJF_HAVE_TYPE_STUB currently
being set only by DWARF/DWARF2.  It should be probably also set at least by
STABS but I tested the code only on DWARF2.  Unaware how feasible would be
unconditional TYPE_STUB() dependency nowadays.


Regards,
Jan