[PATCH,RFC] collect2 LTO for AIX

[Jim Wilson]

On 10/31/2017 12:11 PM, David Edelsohn wrote:
> With your recent removal of SDB and -gcoff support, I would appreciate
> your advice about my patch to incrementally add some preliminary LTO
> support for AIX to collect2.c:
> 
> https://gcc.gnu.org/ml/gcc-patches/2017-10/msg00893.html
> 
> There don't seem to be any other COFF targets around that still use
> the collect2 code to manually scan object and archive files. And I
> don't think that they would be hurt by the additional search for the
> LTO symbol.  I want to check if anyone is aware of a potential problem
> before I commit the code.

The patch is OK.

cygwin uses collect2, but it is using the generic support, not the COFF 
specific support.

The generic support has a check for to verify that we have an object 
file and not an archive file.  See maybe_lto_object_file.  You might 
want to add equivalent code to the COFF support.

Jim