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Re: [Xen-devel] [PATCH 03/16] xen: link against xentoolcore



On Thu, Apr 19, 2018 at 05:45:06PM +0100, Ian Jackson wrote:
> From: Anthony PERARD <anthony.perard@xxxxxxxxxx>
> 
> Xen libraries in 4.10 include a new xentoolcore library.  This
> contains the xentoolcore_restrict_all function which we are about to
> want to use.
> 
> Signed-off-by: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
> Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
> ---
> v5: More truthful commit message.
> ---
>  configure | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/configure b/configure
> index 0a19b03..f580255 100755
> --- a/configure
> +++ b/configure
> @@ -2188,7 +2188,7 @@ if test "$xen" != "no" ; then
>        $($pkg_config --modversion xencontrol | sed 's/\./ /g') )"
>      xen=yes
>      xen_pc="xencontrol xenstore xenguest xenforeignmemory xengnttab"
> -    xen_pc="$xen_pc xenevtchn xendevicemodel"
> +    xen_pc="$xen_pc xenevtchn xendevicemodel xentoolcore"

I think we want to check if "xentoolcore" pkg_config exist before trying
to use it. Otherwith, that is not going to work with Xen older than
4.10.

`pkg-config --libs` will throw an error without printing anything if
one of the library doesn't exist.

Instead, we could do this:
if $pkg_config --exists xentoolcore; then
  xen_pc+=" xentoolcore"
fi

>      QEMU_CFLAGS="$QEMU_CFLAGS $($pkg_config --cflags $xen_pc)"
>      libs_softmmu="$($pkg_config --libs $xen_pc) $libs_softmmu"
>      LDFLAGS="$($pkg_config --libs $xen_pc) $LDFLAGS"


-- 
Anthony PERARD

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