[LLVMdev] [lld] Diagnostics

[Sean Silva]

On Mon, Oct 7, 2013 at 7:02 PM, Nick Kledzik <kledzik at apple.com> wrote:

> I think we need a straw man proposal to start iterating on.  Clang’s
> diagnostics has lots of good features.  But is has lots that a linker does
> not need.  For instance, the line/column number does not make sense for a
> linker.
>

Linker scripts will need this (although we still don't really have a good
idea of how to fully integrate the necessary subset of linker script
functionality into LLD, and it's not clear when that will become a
priority).

-- Sean Silva


> Clang errors/warnings are mostly about the source language which is pretty
> standard across different platforms.  Other than multiple-defined and
> undefined errors, most of the linker errors and warnings will be platform
> specific.
>
> Linker warnings and errors are also historically very cryptic.  Linker
> errors usually have a low level cause, and a high level action for the
> developer to take to resolve the issue.  For instance, the low level
> trigger would be a particular relocation kind is not expected.  The high
> level fix is to change the compiler options (e.g. -fno-pic) for a
> particular file.  It would be nice to capture the low and high level in
> lld’s diagnostics.
>
> -Nick
>
>
> On Oct 7, 2013, at 3:36 PM, Rui Ueyama <ruiu at google.com> wrote:
>
> I think having diagnostics interface similar to Clang's would be good. I
> think the total number of defined warnings would be much smaller than Clang.
>
> On Mon, Oct 7, 2013 at 3:19 PM, Shankar Easwaran <shankare at codeaurora.org>wrote:
>
>> Ping ?
>>
>>
>> On 10/4/2013 10:41 PM, Shankar Easwaran wrote:
>>
>>> Hi,
>>>
>>> lld doesnot have a Diagnostics interface, It uses llvm::errs() to
>>> display errors after linking has been done.
>>>
>>> I think the Diagnostics interface follow similiar interface patterns as
>>> followed by clang (using Diagnostic td files).
>>>
>>> What do you think ?
>>>
>>> Thanks
>>>
>>> Shankar Easwaran
>>>
>>>
>>
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