Re: [PATCH v2 01/25] bitbake.conf: support for merged usr with DISTRO_FEATURE usrmerge

["Valluri, Amarnath" <amarnath.valluri@intel.com>]

On Thu, 2017-06-08 at 07:37 +0100, Richard Purdie wrote:
> On Wed, 2017-06-07 at 17:04 +0000, Peter Kjellerstedt wrote:
> > 
> > > 
> > > 
> > > -----Original Message-----
> > > From: openembedded-core-bounces@lists.openembedded.org
> > > [mailto:openembedded-core-bounces@lists.openembedded.org] On
> > > Behalf
> > > Of
> > > Patrick Ohly
> > > Sent: den 7 juni 2017 16:32
> > > To: Richard Purdie <richard.purdie@linuxfoundation.org>
> > > Cc: Joshua Lock <joshua.g.lock@intel.com>; openembedded-
> > > core@lists.openembedded.org
> > > Subject: Re: [OE-core] [PATCH v2 01/25] bitbake.conf: support for
> > > merged usr with DISTRO_FEATURE usrmerge
> > > 
> > > On Wed, 2017-06-07 at 12:52 +0100, Richard Purdie wrote:
> > > > 
> > > > 
> > > > On Wed, 2017-02-22 at 10:26 +0200, Amarnath Valluri wrote:
> > > > > 
> > > > > 
> > > > > From: Joshua Lock <joshua.g.lock@intel.com>
> > > > > 
> > > > > Modify bindir, libdir and sbindir to be exec_prefix/$d,
> > > > > rather
> > > > > than
> > > > > base_prefix/$d, when the usrmerge DISTRO_FEATURE is enabled.
> > > > > 
> > > > > Signed-off-by: Joshua Lock <joshua.g.lock@intel.com>
> > > > > ---
> > > > >  meta/conf/bitbake.conf | 12 ++++++++----
> > > > >  1 file changed, 8 insertions(+), 4 deletions(-)
> > > > I was asked to clarify the status of this series. We've taken
> > > > many of
> > > > the changes but the core changes to bitbake.conf haven't been
> > > > merged.
> > > > 
> > > > Ross/I discussed it and we both feel that the bitbake.conf make
> > > > the
> > > > file pretty unreadable. We'd therefore like to see this
> > > > implemented
> > > > as a .inc file which gets included when the relevant
> > > > DISTRO_FEATURE 
> > > > is set (or could just be included by the appropriate distro
> > > > configs). 
> > > > This .inc file would then simply override the paths. I believe
> > > > this 
> > > > would be a lot more readable than the current approach which is
> > > > a 
> > > > key concern in the core config.
> > I actually suggested an alternative change to bitbake.conf in the
> > GitHub 
> > review that changes bitbake.conf to take usrmerge into account:
> > 
> > https://github.com/avalluri/openembedded-core/commit/1655a93238902a
> > 88
> > 3052a55d88ae14dd02243530
> > 
> > I will include my suggested solution here since I will refer to it 
> > below:
> > 
> > diff --git a/meta/conf/bitbake.conf b/meta/conf/bitbake.conf
> > index 0f27e92e96..305eaff583 100644
> > --- a/meta/conf/bitbake.conf
> > +++ b/meta/conf/bitbake.conf
> > @@ -17,11 +17,13 @@ export base_prefix = ""
> >  export prefix = "/usr"
> >  export exec_prefix = "${prefix}"
> >  
> > +root_prefix = "${@bb.utils.contains('DISTRO_FEATURES', 'usrmerge',
> > '${exec_prefix}', '${base_prefix}', d)}"
> > +
> >  # Base paths
> > -export base_bindir = "${base_prefix}/bin"
> > -export base_sbindir = "${base_prefix}/sbin"
> > -export base_libdir = "${base_prefix}/${baselib}"
> > -export nonarch_base_libdir = "${base_prefix}/lib"
> > +export base_bindir = "${root_prefix}/bin"
> > +export base_sbindir = "${root_prefix}/sbin"
> > +export base_libdir = "${root_prefix}/${baselib}"
> > +export nonarch_base_libdir = "${root_prefix}/lib"
> >  
> >  # Architecture independent paths
> >  export sysconfdir = "${base_prefix}/etc"
> > 
> > I think that better maintains the readability of the bitbake.conf
> > file, 
> > while making the $root_prefix variable available as it can be
> > useful
> > in 
> > its own (e.g., in the systemd recipe).
> Agreed, I'm happier with this and can probably accept a single
> DISTO_FEATURES line without the .inc stuff...
Richard, We need the DISTO_FEATURE check even for setting
nativesdk_base_ paths, As nativesdks cannot use this ${root_prefix}.

+root_prefix_nativesdk = "${@bb.utils.contains('DISTRO_FEATURES',
'usrmerge', '${prefix_nativesdk}', '', d)}"
-base_bindir_nativesdk = "/bin"
-base_sbindir_nativesdk = "/sbin"
+base_bindir_nativesdk = "${root_prefix_nativesdk}/bin"
+base_sbindir_nativesdk = "${root_prefix_nativesdk}/sbin"
-base_libdir_nativesdk = "/lib"
+base_libdir_nativesdk = "${root_prefix_nativesdk}/lib"

If ok with this, I can send the revised patch.

- Amarnath