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Re: [Xen-devel] EXTRA_CFLAGS when compiling Xen

To: Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxx>

From: Corneliu ZUZU <czuzu@xxxxxxxxxxxxxxx>

Date: Wed, 17 Feb 2016 12:34:54 +0200

Cc: Tamas K Lengyel <tamas@xxxxxxxxxxxxx>, Keir Fraser <keir@xxxxxxx>, Ian Campbell <ian.campbell@xxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>

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List-id: Xen developer discussion <xen-devel.lists.xen.org>

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).

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