From mboxrd@z Thu Jan  1 00:00:00 1970
From: Corneliu ZUZU <czuzu@bitdefender.com>
Subject: Re: EXTRA_CFLAGS when compiling Xen
Date: Wed, 17 Feb 2016 12:34:54 +0200
Message-ID: <56C44CCE.3030309@bitdefender.com>
References: <56C4493D.10703@bitdefender.com> <56C44A25.5010506@bitdefender.com>
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To: Razvan Cojocaru <rcojocaru@bitdefender.com>, Xen-devel <xen-devel@lists.xen.org>
Cc: Tamas K Lengyel <tamas@tklengyel.com>, Keir Fraser <keir@xen.org>, Ian Campbell <ian.campbell@citrix.com>, Andrew Cooper <andrew.cooper3@citrix.com>, Stefano Stabellini <stefano.stabellini@citrix.com>, Jan Beulich <jbeulich@suse.com>
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On 2/17/2016 12:23 PM, Razvan Cojocaru wrote:
>> Could anyone tell me if and how I could pass some GCC extra compilation
>> flags when building Xen (i.e. make dist-xen)?
>> I tried:
>> * when running make: passing EXTRA_CFLAGS
>> * when running make: passing CFLAGS (this "works" but overrides the rest
>> of the CFLAGS)
>> * when running ./configure: passing --extra-cflags.
>> None works.
>>
>> Is there an established modality for this or must I manually modify the
>> makefiles?
>> The reason I need this is to pass '-save-temps' to GCC, I want to
>> inspect some code
>> and it would be easier to do that on the preprocessed files.
> Does editing Config.mk not work?

I was wondering also if there is a "proper" way to do that, but that 
easily does the job, thanks.

For whoever else needs this, I simply added CFLAGS += -save-temps=obj in 
Config.mk (see similar "CFLAGS +=" lines).

Corneliu.