[llvm-dev] [lld] section attributes lld can use to safely drop a section from obj files

[Sameer Abu Asal via llvm-dev]

--Sameer Abu Asal ,

Yeah, there is an attribute you can use to tell the linker to ignore a
> section, SHF_EXCLUDE. it was used for some DWARF stuff here:
> https://reviews.llvm.org/D52303

YES, that is what I am looking for!!.

Too bad there is no simple mechanism to  attach section attributes for a
Global in LLVM IR.

On Tue, Aug 6, 2019 at 12:25 PM David Blaikie <dblaikie at gmail.com> wrote:

> Yeah, there is an attribute you can use to tell the linker to ignore a
> section, SHF_EXCLUDE. it was used for some DWARF stuff here:
> https://reviews.llvm.org/D52303
>
> On Tue, Aug 6, 2019 at 11:52 AM Reid Kleckner via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
>
>> I guess I will ask the obvious question: Can Swift be migrated to the
>> .deplibs feature that was added to ELF LLD instead?
>>
>> Hmm, I think a switch to the .dplibs or .linker options is possible.
Maybe Saleem can chime in on this.

I don't know the answer to your original question, unfortunately.
>>
>> On Tue, Aug 6, 2019 at 11:48 AM Sameer Abu Asal via llvm-dev <
>> llvm-dev at lists.llvm.org> wrote:
>>
>>> Hello llvm\lld,
>>>
>>>
>>> The autlolink feature in swift appends a section to the obj files
>>> (.swift1_autolink_entries) that is later need to determine what t link
>>> against in the final linked binary.
>>>
>>> I am trying to get rid of these section in the final linked binary at
>>> link time. I understand this could be done with (llvm-objcopy
>>>  --remove-section=.swift1_autolink_entries) but would like have the linker
>>> do it.
>>>
>>> Is there an attribute I can set in that section that the linker can
>>> safely drop such a section?
>>>
>>> Thank you,
>>>
>>>
>>>
>>>
>>>
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>>> llvm-dev at lists.llvm.org
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