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Re: [Xen-devel] [PATCH 2/5] raisin: Detect systemd



On Mon, 19 Oct 2015, George Dunlap wrote:
> On 16/10/15 14:41, Stefano Stabellini wrote:
> > On Wed, 14 Oct 2015, George Dunlap wrote:
> >> On 14/10/15 17:21, George Dunlap wrote:
> >>> Add systemd development libraries if we detect systemd present on the 
> >>> system
> >>>
> >>> Signed-off-by: George Dunlap <george.dunlap@xxxxxxxxxx>
> >>
> >> Sorry, meant to add a comment here...
> >>
> >>> ---
> >>>  components/xen | 10 ++++++++++
> >>>  1 file changed, 10 insertions(+)
> >>>
> >>> diff --git a/components/xen b/components/xen
> >>> index 090cceb..93ed288 100644
> >>> --- a/components/xen
> >>> +++ b/components/xen
> >>> @@ -8,6 +8,11 @@ function xen_check_package() {
> >>>      local DEP_Debian_common="build-essential python-dev gettext uuid-dev 
> >>>   \
> >>>               libncurses5-dev libyajl-dev libaio-dev pkg-config 
> >>> libglib2.0-dev  \
> >>>               libssl-dev libpixman-1-dev bridge-utils wget"
> >>> +
> >>> +    if [[ -e "/usr/lib/systemd" ]]
> >>> +    then
> >>> + DEP_Debian_common="$DEP_Debian_common libsystemd-daemon-dev"
> >>> +    fi
> >>>      local DEP_Debian_x86_32="$DEP_Debian_common bcc iasl bin86 texinfo"
> >>>      local DEP_Debian_x86_64="$DEP_Debian_x86_32 libc6-dev-i386"
> >>>      local DEP_Debian_arm32="$DEP_Debian_common libfdt-dev"
> >>> @@ -16,6 +21,10 @@ function xen_check_package() {
> >>>      local DEP_Fedora_common="make gcc python-devel gettext libuuid-devel 
> >>>   \
> >>>               ncurses-devel glib2-devel libaio-devel openssl-devel 
> >>> yajl-devel   \
> >>>               patch pixman-devel glibc-devel bridge-utils grub2 wget tar 
> >>> bzip2"
> >>> +    if [[ -e "/usr/lib/systemd" ]]
> >>> +    then
> >>> + DEP_Fedora_common="$DEP_Fedora_common 
> >>> systemd-devel|systemd-container-devel"
> >>> +    fi
> >>
> >> This is a bit dodgy, as basically CentOS (and I think Fedora) have
> >> separate packages for systemd when inside a container vs on real
> >> hardware.  But unfortunately I'm not sure there's a way to make yum
> >> smart enough to know, "Gee, I'm in a container, I should run systemd
> >> instead".
> >>
> >> Having the "alias" like this allows the user to work around it by
> >> manually installing systemd-container-devel.  It's not great though,
> >> because there's still nothing to prompt the user to install the correct
> >> package.
> > 
> > Can we check which package is installed on the system using
> > check-package (systemd vs systemd-container)? Maybe that would be more
> > reliable.
> 
> Oh, you mean check-package and then modify the list of required packages
> as a result?  That could work.

Yes, that is what I had in mind. Better than relying on a filesystem
path.

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