Re: [ptxdist] [PATCH] host-systemd: Add option to install dev files

[Michael Olbrich <m.olbrich@pengutronix.de>]

On Fri, Jul 09, 2021 at 09:28:32AM -0400, Jon Ringle wrote:
> On Thu, Jul 8, 2021 at 12:59 AM Michael Olbrich <m.olbrich@pengutronix.de>
> wrote:
> 
> > On Wed, Jul 07, 2021 at 05:06:56PM -0400, Jon Ringle wrote:
> > > On Fri, Jun 25, 2021 at 5:41 AM Michael Olbrich <
> > m.olbrich@pengutronix.de>
> > > wrote:
> > >
> > > > On Tue, Jun 22, 2021 at 04:35:04PM +0000, jon@ringle.org wrote:
> > > > > From: Jon Ringle <jringle@gridpoint.com>
> > > > >
> > > > > Doing a full install that include dev files is
> > > > > helpful if a project needs this support.
> > > > >
> > > > > I created a host-sdbus-cpp project that depends
> > > > > on libsystemd. The -Drootprefix=/ was required
> > > > > to have cmake pkg-config work properly.
> > > > >
> > > > > Signed-off-by: Jon Ringle <jringle@gridpoint.com>
> > > > > ---
> > > > >  rules/host-systemd.in   | 7 +++++++
> > > > >  rules/host-systemd.make | 7 +++++++
> > > > >  2 files changed, 14 insertions(+)
> > > > >
> > > > > diff --git a/rules/host-systemd.in b/rules/host-systemd.in
> > > > > index f80d9de10..828694f80 100644
> > > > > --- a/rules/host-systemd.in
> > > > > +++ b/rules/host-systemd.in
> > > > > @@ -7,3 +7,10 @@ config HOST_SYSTEMD
> > > > >       select HOST_GPERF
> > > > >       select HOST_UTIL_LINUX_NG
> > > > >       select HOST_LIBCAP
> > > > > +
> > > > > +config HOST_SYSTEMD_INSTALL_DEV
> > > > > +     bool
> > > > > +     default n
> > > > > +     help
> > > > > +      Install host systemd development headers/libs
> > > > > +
> > > > > diff --git a/rules/host-systemd.make b/rules/host-systemd.make
> > > > > index 42409d7b5..58b44a683 100644
> > > > > --- a/rules/host-systemd.make
> > > > > +++ b/rules/host-systemd.make
> > > > > @@ -20,6 +20,7 @@ HOST_SYSTEMD_CONF_TOOL      := meson
> > > > >  HOST_SYSTEMD_CONF_OPT        := \
> > > > >       $(HOST_MESON_OPT) \
> > > > >       -Dprefix=/usr \
> > > > > +     -Drootprefix=/ \
> > > >
> > > > This breaks hwdb: The path for the output file is hardcoded as
> > > > "${destdir}${rootprefix}/lib/udev/hwdb.bin"
> > > >
> > > > This breaks hwdb for the host package?
> > >
> > >
> > > > Hmmm, maybe we could add '/usr' to the destdir. Please try that. This
> > is
> > > > the '--root' argument the systemd-hwdb package.
> > > > If it works then the systemd-hwdb package should generate a hwdb that
> > is
> > > > about 10MB in size.
> > > >
> > > > If it works, remove the prefix instead of adding the rootprefix.
> > > >
> > > >
> > > I'm trying to work out how the systemd-hwdb package relates to the
> > > host-systemd package...
> >
> > host-systemd provides the systemd-hwdb host tool that the systemd-hwdb
> > package uses to generate the hwdb database at build-time.
> >
> > The (relative) path, where the database is created is hardcoded and defined
> > by the rootprefix.
> >
> >
> I have never built systemd-hwdb before, but when I do it fails like this:
> 
> ----------------------------
> target: systemd-hwdb.install
> ----------------------------
> 
> install: creating directory
> '/src/build/platform-ec2k/packages/systemd-hwdb-1/usr/lib/udev'
> /src/build/platform-ec2k/sysroot-host/bin/systemd-hwdb: error while loading
> shared libraries: libsystemd-shared-248.so: cannot open shared object file:
> No such file or directory
> make: *** [/src/build/rules/systemd-hwdb.make:26:
> /src/build/platform-ec2k/state/systemd-hwdb.install] Error 127
> 
> I find this file here:
> jringle@-arm-v7a-linux-gnueabihf:~/build$ find
> /src/build/platform-ec2k/sysroot-host/ -name libsystemd-shared-248.so
> /src/build/platform-ec2k/sysroot-host/lib/systemd/libsystemd-shared-248.so

Take a look at host-systemd.make. We move libsystemd-shared-248.so to
sysroot-host/lib/ in the install stage. It's ugly but it works :-). With
your change, that no longer happens and libsystemd-shared-248.so is not
found. Maybe create a symlink for this after world/install?

Michael

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