Re: [Buildroot] [PATCH next 1/1] package/linux-backports: bump version to 5.15.58

[Julien Olivain <ju.o@free.fr>]

Hi Yann, Thomas, All,

On 14/08/2022 22:23, Yann E. MORIN wrote:
> Thomas, Julien, All,
> 
> On 2022-08-13 22:01 +0200, Julien Olivain spake thusly:
[...]
>> - Trying to compile kernel v3.10.108 in qemu_aarch64_virt_defconfig
>>   did not worked out-of-the-box for me (on Buildroot tag
>>   2022.08-rc1, in utils/docker-run). Build fails with:
>> 
>>     dtc-lexer.lex.c: In function 'yylex':
>>     dtc-lexer.l:46:18: error: 'yylloc' undeclared (first use in this
>> function); did you mean 'yyalloc'?
> 
> Gah. This is 9b41b54be077 (linux: fix build with host-gcc 10+)...
> 
> That's because in 3.10, the dtc sub-dir still had the pre-generated
> lexer and parser. And with 9b41b54be077, we remove all lines that
> instanciate yylloc as a YYLTYPE:
> 
>     grep -Z -l -r -E '^YYLTYPE yylloc;$$' $(@D) \
>     |xargs -0 -r $(SED) '/^YYLTYPE yylloc;$$/d'
> 
> So, this will remove it in bot the actual source and the pre-generated 
> C
> files.
> 
> So, yeah, we might even be able to build a 3.10 kernel with 
> contemporary
> Buildroot versions anyway...
> 
> We could fix that by passing REGENERATE_PARSERS=1 in 
> LINUX_MAKE_FLAGS...
> Julien, could you test that, please?

I quickly tried adding REGENERATE_PARSERS=1 in LINUX_MAKE_FLAGS.
It's still failing with:

     dtc-lexer.lex.c: In function 'yylex':
     dtc-lexer.l:46:18: error: 'yylloc' undeclared (first use in this 
function); did you mean 'yyalloc'?
     [...]
     dtc-parser.y: In function 'print_error':
     dtc-parser.y:478:17: error: 'yylloc' undeclared (first use in this 
function); did you mean 'yyalloc'?
     dtc-parser.y:478:17: note: each undeclared identifier is reported 
only once for each function it appears in

I'll investigate later.

In order to test that thoroughly, what is the oldest kernel we would 
like to compile
out-of-the-box in Buildroot?  v3.0?

Best regards,

Julien.
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