[oe] [OE-core] [RFT] GCC 8.1

[Andre McCurdy]

On Thu, May 10, 2018 at 12:11 PM, Martin Jansa <martin.jansa at gmail.com> wrote:
> On Thu, May 10, 2018 at 11:50:02AM -0700, Khem Raj wrote:
>> Hi Martin
>>
>> Thanks for testing and reporting back
>>
>> On 5/9/18 2:38 AM, Martin Jansa wrote:
>> > My initial tests show couple issues, but usually caused by other changes
>> > in that branch, not the gcc-8 itself.
>> >
>> > 1) strace-4.22 from
>> > http://git.openembedded.org/openembedded-core-contrib/commit/?h=kraj/gcc-8&id=af33a8b721cc9caebd3f5226b4c5903f666ab654
>> > fails to build with ptest enabled (it builds with 4.20 version if I
>> > revert this change)
>> > ../../strace-4.22/tests/inject-nf.c: In function 'main':
>> > ../../strace-4.22/tests/inject-nf.c:86:1: error: r7 cannot be used in
>> > asm here
>> >   }
>> >   ^
>>
>> are you targeting thumb1 ? how can I reproduce it ?
>
> I'm trying to find out what's different in the builds where it was
> failing, will provide more info later.

This is probably due to making an inline syscall from Thumb (doesn't a
matter Thumb1 or Thumb2) with frame pointers enabled.

Does adding -fomit-frame-pointer to CFLAGS fix it?