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Re: [Xen-devel] [PATCH 5/5] raisin: Add XEN_CONFIG_EXTRA to config file



On Mon, 19 Oct 2015, George Dunlap wrote:
> On 16/10/15 14:53, Stefano Stabellini wrote:
> > On Wed, 14 Oct 2015, George Dunlap wrote:
> >> Allowing the user to enable or disable specific functionality, such as
> >> stubdoms.
> >>
> >> Signed-off-by: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
> > 
> > I don't like this very much: if we want to disable stubdoms by default
> > with all configs, then I would prefer to simply add --disable-stubdom to
> > components/xen without introducing XEN_CONFIG_EXTRA.
> > 
> > Otherwise if we want to give users the chance to add an extra config
> > option, I would introduce a generic way to do that, so that people can
> > use it with any components they want, QEMU, libvirt, etc.
> 
> You did notice that this config option is disabled by default, right?  I
> added the line commented-out as an example of the sort of thing you
> might want to do.
> 
> I don't think we want to disable stubdoms by default across the board.
> 
> I wouldn't object to adding empty config variables to the other
> components; I just don't have a good way to test them at the moment.
 
What if we just add an environmental variable named as
COMPONENT_BUILD_CONFIGURE at the end of the configure line when
appropriate?  Of course it would need to be documented in the README.

Something like:


diff --git a/components/qemu b/components/qemu
index dce4ce0..0e57bdb 100644
--- a/components/qemu
+++ b/components/qemu
@@ -27,7 +27,7 @@ function qemu_build() {
         --disable-docs \
         --bindir=$PREFIX/lib/xen/bin \
         --datadir=$PREFIX/share/qemu-xen \
-        --disable-guest-agent
+        --disable-guest-agent $QEMU_BUILD_CONFIGURE
     $RAISIN_MAKE all
     $RAISIN_MAKE install DESTDIR="$INST_DIR"
     cd "$BASEDIR"
diff --git a/components/xen b/components/xen
index 6b700e5..01527ec 100644
--- a/components/xen
+++ b/components/xen
@@ -39,7 +39,7 @@ function xen_build() {
         ovmf_opt="--enable-ovmf 
--with-system-ovmf="$BASEDIR"/ovmf-dir/ovmf.bin"
     fi
     ./configure --prefix=$PREFIX 
--with-system-qemu=$PREFIX/lib/xen/bin/qemu-system-i386 \
-        --disable-qemu-traditional --enable-rombios $seabios_opt $ovmf_opt
+        --disable-qemu-traditional --enable-rombios $seabios_opt $ovmf_opt 
$XEN_BUILD_CONFIGURE
     $RAISIN_MAKE
     $RAISIN_MAKE install DESTDIR="$INST_DIR"
     cd "$BASEDIR"

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