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Date: Tue, 26 May 2015 19:17:10 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH] Makefile.target: set master BUILD_DIR
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To: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Cc: Peter Crosthwaite <crosthwaitepeter@gmail.com>, Peter Crosthwaite <crosthwaite.peter@gmail.com>, "qemu-devel@nongnu.org Developers" <qemu-devel@nongnu.org>, Gerd Hoffmann <kraxel@redhat.com>



On 26/05/2015 19:15, Peter Crosthwaite wrote:
> On Tue, May 26, 2015 at 6:29 AM, Paolo Bonzini <pbonzini@redhat.com> wrote:
>>
>>
>> On 26/05/2015 07:38, Peter Crosthwaite wrote:
>>> make can be invoked in the individual build dirs to build an individual
>>> target or just a single file of a target. e.g.
>>>
>>> touch translate-all.c
>>> make -C microblazeel-softmmu translate-all.o
>>
>> Out of curiosity, why not use "make subdir-microblazeel-softmmu" instead?
>>
> 
> Does that in any way allow you to specify a single file?
> 
> This come up in my multi-arch work, where I am constantly touching
> core headers while being a fully configured build. Every change
> triggers major recompilation. So to make my quick edits I have started
> a process where I use this fuller make specification to rebuild the
> one under-development file+target combo that failed until the build
> bugs go away. Then once is works I continue with unqualified build. I
> also want to avoid retrigger of the common-obj build.

Understood, thanks for the application.  I'll include the patch in my
next pull request (and will prepare a public git tree sooner rather than
later).

Paolo