Re: [GSoC]Bypass assembler when generating LTO object files

[Ankur Saini <arsenic.secondary@gmail.com>]

> On 08-Apr-2022, at 6:32 PM, Jan Hubicka <hubicka@kam.mff.cuni.cz> wrote:
> 
> Ankur,
>> I was browsing the list of submitted GSoC projects this year and the
>> project regarding bypassing assembler when generating LTO object files
>> caught my eye.
> I apologize for late reply.  I would be very happy to mentor this
> project.

Thanks for the reply, but unfortunately, due to some reasons, I would not
be able to take part in GSoC this year.  
But the project seems interesting and would be amazing opportunity to
learn a lot more things for me, so would it be okay if I try to give it a
go outside GSoC if no-one else picks it as their GSoC project this year ?

>> 
>> I already have a gcc built from source (sync-ed with trunk/master) and
>> launched the test-suite on it.
>> 
>> I am currently in process of understanding the primilary patch
>> (https://gcc.gnu.org/legacy-ml/gcc/2014-09/msg00340.html), and
>> experimenting with it.
>> 
>> are there any other things I should be aware of (useful Doc/blog or a
>> bug tracking the project) before proceeding further ?
> 
> I think it is pretty much all that exists.  Basically we will need to
> implement everything that is necessary to stream out valid object file
> directly from GCC rather than going through gas.  The experimental
> prototype sort of worked but it was lacking few things.

When I try to apply that patch on my local branch ( branched from trunk ),
it seem to be incompatible with the current working tree. Is there a
specific branch that I have to apply it to ? or is it due to the recent
file rename patch ( changing extensions from .c to .cc ) ? 

```
$ git apply --check bypass_asm_patch

error: patch failed: Makefile.in:1300
error: Makefile.in: patch does not apply
error: common.opt: No such file or directory
error: langhooks.c: No such file or directory
error: lto/Make-lang.in: No such file or directory
error: lto/lto-object.c: No such file or directory
error: lto/lto.c: No such file or directory
error: lto/lto.h: No such file or directory
error: lto-streamer.h: No such file or directory
error: toplev.c: No such file or directory
```

Thanks 
- Ankur