[llvm] r176143 - Debug Info: for static member variables, add AT_MIPS_linkage_name to the

[Eric Christopher]

>
>
> which seems to have the linkage name on the TAG_variable die and nowhere
> else (for this testcase) which partially seems what you're doing (adding it
> to the TAG_variable).
>
>
Just noticed, FWIW, that gcc 4.8 is using the newer DW_AT_linkage_name from
dwarf-4 2.22 for the linkage names which obviously won't work here, but it
gives a definition of:

  "Some language implementations, notably C++ and similar languages, make
use of implementation defined names within object files that are different
from the identifier names (see Section 2.15) of entities as they appear in
the source. Such names, sometimes known as mangled names, are used in
various ways, such as: to encode additional information about an entity, to
distinguish multiple entities that have the same name, and so on. When an
entity has an associated distinct linkage name it may sometimes be useful
for a producer to include this name in the DWARF description of the program
to facilitate consumer access to and use of object file information about
an entity and/or information that is encoded in the linkage name itself.

A debugging information entry may have a DW_AT_linkage_name attribute whose
value is a null-terminated string describing the object file linkage name
associated with the corresponding entity.

Debugging information entries to which DW_AT_linkage_name may apply
include: DW_TAG_common_block, DW_TAG_constant, DW_TAG_entry_point,
DW_TAG_subprogram
and DW_TAG_variable.*"*

 but if gdb needs the linkage name on the variable and on the member then
we should probably go ahead and put it on the member as a compatibility
option and on the variable always (and updating the comments/testcases
appropriately).

Read your new email and I can go with that modulo the above :)

-eric
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