Re: [Xen-devel] [xen-unstable-smoke bisection] complete build-arm64-xsm

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 14/03/2018 07:59, Jan Beulich wrote:
>>>> On 14.03.18 at 03:29, <osstest-admin@xxxxxxxxxxxxxx> wrote:
>> branch xen-unstable-smoke
>> xenbranch xen-unstable-smoke
>> job build-arm64-xsm
>> testid xen-build
>>
>> Tree: qemuu git://xenbits.xen.org/qemu-xen.git
>> Tree: xen git://xenbits.xen.org/xen.git
>>
>> *** Found and reproduced problem changeset ***
>>
>>   Bug is in tree:  xen git://xenbits.xen.org/xen.git
>>   Bug introduced:  b43501451733193b265de30fd79a764363a2a473
>>   Bug not present: eef83fd2af0d4c78afec34c199c977fc97d8a0b3
>>   Last fail repro: http://logs.test-lab.xenproject.org/osstest/logs/120707/ 
>>
>>
>>   commit b43501451733193b265de30fd79a764363a2a473
>>   Author: Doug Goldstein <cardoe@xxxxxxxxxx>
>>   Date:   Mon Mar 12 23:06:51 2018 -0500
>>   
>>       tools: detect appropriate debug optimization level
>>       
>>       When building debug use -Og as the optimization level if its available,
>>       otherwise retain the use of -O0. -Og has been added by GCC to enable 
>> all
>>       optimizations that to not affect debugging while retaining full
>>       debugability.
>>       
>>       Signed-off-by: Doug Goldstein <cardoe@xxxxxxxxxx>
>>       Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>
> Sadly altering optimization levels always has the potential of
> triggering issues like this:
>
> xc_dom_arm.c: In function 'meminit':
> xc_dom_arm.c:446:5: error: 'p2m_size' may be used uninitialized in this 
> function [-Werror=maybe-uninitialized]
>      for ( pfn = 0; pfn < p2m_size; pfn++ )
>      ^
> cc1: all warnings being treated as errors
> /home/osstest/build.120709.build-arm64-xsm/xen/tools/libxc/../../tools/Rules.mk:230:
>  recipe for target 'xc_dom_arm.o' failed
> make[5]: *** [xc_dom_arm.o] Error 1

We really should be build testing things at all optimisation levels.  We
should be ashamed that -O3 gives build failures in most of our major
components.  (This is yet another item on my TODO list which I've not
had time to complete.)

~Andrew

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel