Re: [PATCH] More rustspec.cc cleanups

[Philip Herron <philip.herron@embecosm.com>]

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On 07/08/2021 00:08, Mark Wielaard wrote:
> Hi Philip,
>
> On Fri, Aug 06, 2021 at 03:58:24PM +0100, Philip Herron wrote:
>> Great patch, this file has been neglected. This is now being merged
>> https://github.com/Rust-GCC/gccrs/pull/610
>>
>> Its not 100% clear but is the compiler driver here automatically adding
>> in -lc or is it simply checking if it saw_libc?
> It does pass -lc (if not saw_libc).  You can see what is invoked with
> which arguments using -v (e.g. gcc/gccrs -B gcc -v foobar.rs).
>
> One of the things we are using is the crt1.o startup code, which
> provides the _start symbol and which relies on libc (in particular
> __libc_start_main and abort).
>
> The patch wasn't really meant to change how we currently do
> assembling, linking and startup. But just to remove those parts that
> were unnecessary because they were go specific.
>
> Cheers,
>
> Mark
>
Awesome thanks for checking. Agreed that this patch was not meant to
change that behavior but it was a great start at cleaning up the driver.

I am now wondering if rustc reuses the same type of startup code. I'll
go ask more questions about it :)

Thanks

--Phil 



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