Re: [XEN PATCH v5 04/16] xen/build: have the root Makefile generates the CFLAGS

[Jan Beulich <jbeulich@xxxxxxxx>]

On 24.04.2020 11:45, Anthony PERARD wrote:
> On Thu, Apr 23, 2020 at 06:40:33PM +0200, Jan Beulich wrote:
>> On 21.04.2020 18:11, Anthony PERARD wrote:
>>> --- a/xen/arch/x86/Rules.mk
>>> +++ b/xen/arch/x86/Rules.mk
> [..]
>>> +c_flags += $(object_label_flags) $(CFLAGS-stack-boundary)
>>> +a_flags += $(object_label_flags) $(CFLAGS-stack-boundary)
>>
>> Why are you also adding these to a_flags? It probably doesn't hurt,
>> but I'd prefer if it was removed (could be done while committing if
>> all acks arrive and other other need for av6 arises) if there's no
>> clear need.
> 
> Those flags are already in a_flags (or previously AFLAGS). I've tried to
> be careful to avoid changing the list of *flags in an already
> complicated enough patch. I would like to keep this patch that way.
> 
> If the -D__OBJECT_LABEL__ and the stack-bondary flags aren't needed in
> a_flags, it would be better to remove them in a separated patch, with
> some explanation on why they are removed.

Ah, fair point - previously we had

# Most CFLAGS are safe for assembly files:
#  -std=gnu{89,99} gets confused by #-prefixed end-of-line comments
#  -flto makes no sense and annoys clang
AFLAGS += $(filter-out -std=gnu% -flto,$(CFLAGS))

and hence implicitly inherited all kinds of inapplicable flags.
I'm fine with this (and probably other things) getting taken care
of later then.

> What is av6?

I was missing a blank: "a v6". Also s/other other/no other".

Jan