[U-Boot] [PATCH v8 14/30] efi: Don't build sandbox with __attribute__((ms_abi))

[Alexander Graf]

On 06/21/2018 04:02 AM, Simon Glass wrote:
> Hi Alex,
>
> On 20 June 2018 at 02:56, Alexander Graf <agraf at suse.de> wrote:
>> On 06/20/2018 12:02 AM, Simon Glass wrote:
>>> Hi Alex,
>>>
>>> On 18 June 2018 at 08:46, Alexander Graf <agraf at suse.de> wrote:
>>>> On 06/18/2018 04:08 PM, Simon Glass wrote:
>>>>> There appears to be a bug [1] in gcc when using varargs with this
>>>>> attribute. Disable it for sandbox so that functions which use that can
>>>>> work correctly, such as install_multiple_protocol_interfaces().
>>>>>
>>>>> [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70955
>>>>>
>>>>> Signed-off-by: Simon Glass <sjg at chromium.org>
>>>>
>>>> See my patch instead please.
>>> OK I see it now. Do you know what gcc fixes this problem?
>>
>> The bug you found was really just a gcc bug that hit early gcc6 versions. I
>> doubt you're running into it :).
> OK, so in fact gcc does not support varargs problems with the ms_abi?

Gcc needs to know whether varargs are sysv varargs or ms varargs. And it 
differentiates between the two with different variable types for va_list.


Alex