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From: George Dunlap <george.dunlap@citrix.com>
To: Stefano Stabellini <sstabellini@kernel.org>
Cc: xen-devel@lists.xenproject.org
Subject: Re: [PATCH raisin 4/4] Update to 4.7, update qemu and qemu_traditional recipes
Date: Tue, 14 Jun 2016 11:17:18 +0100	[thread overview]
Message-ID: <575FD9AE.1080504@citrix.com> (raw)
In-Reply-To: <alpine.DEB.2.10.1606141107200.2878@sstabellini-ThinkPad-X260>

On 14/06/16 11:08, Stefano Stabellini wrote:
> On Tue, 14 Jun 2016, George Dunlap wrote:
>> On 14/06/16 10:46, Stefano Stabellini wrote:
>>> On Mon, 13 Jun 2016, George Dunlap wrote:
>>>> Add a 4.7 config file, make it the default.
>>>>
>>>> Also update the qemu and qemu_traditional recipies after Ian Cambell's
>>>> work to split off separate libraries.
>>>>
>>>> Signed-off-by: George Dunlap <george.dunlap@citrix.com>
>>>> ---
>>>> CC: Stefano Stabellini <sstabellini@kernel.org>
>>>> ---
>>>>  components/qemu             | 21 +++++++++++++--------
>>>>  components/qemu_traditional |  2 +-
>>>>  configs/config-4.7          |  8 ++++++++
>>>>  defconfig                   |  2 +-
>>>>  4 files changed, 23 insertions(+), 10 deletions(-)
>>>>
>>>> diff --git a/components/qemu b/components/qemu
>>>> index e0d92a5..8624b50 100644
>>>> --- a/components/qemu
>>>> +++ b/components/qemu
>>>> @@ -23,15 +23,20 @@ function qemu_build() {
>>>>      cd "$BASEDIR"
>>>>      git-checkout $QEMU_URL $QEMU_REVISION qemu-dir
>>>>      cd qemu-dir
>>>> -    ./configure --enable-xen --target-list=i386-softmmu --prefix=$PREFIX \
>>>> -        --extra-cflags="-I$INST_DIR/$PREFIX/include" \
>>>> -        --extra-ldflags="-L$INST_DIR/$PREFIX/lib -Wl,-rpath-link=$INST_DIR/$PREFIX/lib \
>>>> +
>>>> +    ./configure --enable-xen --target-list=i386-softmmu \
>>>> +		--prefix=$PREFIX \
>>>> +		--extra-cflags="-DXC_WANT_COMPAT_EVTCHN_API=1 \
>>>> +		-DXC_WANT_COMPAT_GNTTAB_API=1 \
>>>> +		-DXC_WANT_COMPAT_MAP_FOREIGN_API=1 \
>>>> +                -I$INST_DIR/$PREFIX/include" \
>>>> +		--extra-ldflags="-L$INST_DIR/$PREFIX/lib -Wl,-rpath-link=$INST_DIR/$PREFIX/lib \
>>>>                           -L$INST_DIR/$PREFIX/lib64 -Wl,-rpath-link=$INST_DIR/$PREFIX/lib64" \
>>>> -        --disable-kvm \
>>>> -        --disable-docs \
>>>> -        --bindir=$PREFIX/lib/xen/bin \
>>>> -        --datadir=$PREFIX/share/qemu-xen \
>>>> -        --disable-guest-agent
>>>> +		--bindir=$PREFIX/lib/xen/bin \
>>>> +		--datadir=$PREFIX/share/qemu-xen \
>>>> +		--disable-kvm \
>>>> +		--disable-docs \
>>>> +		--disable-guest-agent
>>>
>>> This is adding XC_WANT_COMPAT_EVTCHN_API=1, etc, unconditionally. If we
>>> make this change, will raisin still be able to buil an older qemu
>>> against an older xen?
>>
>> I've tested this with XEN_RELEASE set to 4.5 and 4.6, and it builds just
>> fine.  The #define is just ignored, since neither Xen nor qemu in the
>> 4.5 and 4.6 branches know anything about it.
>>
>> If part of our goal is to be a repository of the canonical way to build
>> things, though, perhaps it would be better to have the extra flags be
>> conditional on the value of XEN_RELEASE.
> 
> If we are sure that it's ignored than it might be benign. Maybe we
> should just add an in-code comment to explain why we added it though.

Well really, I think that the detection should be put into the qemu
configure scripts -- i.e., it should detect that there's the new API and
add the appropriate #defines itself.  But that's the sort of change I
don't think there will be a lot of enthusiasm for. :-)

I'll add a comment.

 -George



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  reply	other threads:[~2016-06-14 10:18 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-13 14:44 [PATCH raisin 0/4] Fixes for 4.6, update to 4.7 George Dunlap
2016-06-13 14:44 ` [PATCH raisin 1/4] components/xen: Actually disable rombios George Dunlap
2016-06-14  9:32   ` Stefano Stabellini
2016-06-13 14:44 ` [PATCH raisin 2/4] config: Separate config urls into a separate file George Dunlap
2016-06-14  9:34   ` Stefano Stabellini
2016-06-13 14:44 ` [PATCH raisin 3/4] Update config-4.6 and config-4.5 to point to stable branches George Dunlap
2016-06-14  9:40   ` Stefano Stabellini
2016-06-14  9:57     ` George Dunlap
2016-06-14 10:01       ` Stefano Stabellini
2016-06-14 10:10         ` George Dunlap
2016-06-15 10:24           ` Stefano Stabellini
2016-06-15 10:38             ` George Dunlap
2016-06-15 10:53               ` Stefano Stabellini
2016-06-15 11:13                 ` George Dunlap
2016-06-15 14:02                   ` Stefano Stabellini
2016-06-15 16:11                     ` George Dunlap
2016-06-13 14:44 ` [PATCH raisin 4/4] Update to 4.7, update qemu and qemu_traditional recipes George Dunlap
2016-06-14  9:46   ` Stefano Stabellini
2016-06-14 10:03     ` George Dunlap
2016-06-14 10:08       ` Stefano Stabellini
2016-06-14 10:17         ` George Dunlap [this message]
2016-06-14 10:31           ` Stefano Stabellini
2016-06-14 10:34             ` George Dunlap
2016-06-14 13:53               ` Anthony PERARD
2016-06-14 14:00                 ` George Dunlap
2016-06-14 14:23                   ` Anthony PERARD
2016-06-14 14:38                     ` George Dunlap
2016-06-15 10:39                 ` Stefano Stabellini
2016-06-15 10:42                   ` George Dunlap

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