Re: Cross compile gpsd-3.20.1~dev for arm with buildroot

[Florian Kiera]

An update to the latest mail:

I found the reason why it doesn't work!

Somehow gpsd tries to install the python directory "gps" to STAGING_DIR/home/user/buildrootpath/output/host/lib/python2.7/site-packages/ instead of just the /home/user/buildrootpath/output/host/lib/python2.7/site-packages/ which causes gpsd to create the directories of user/buildrootpath/... etc and that created directory path is supposed to not be existing. Since it exists an unfortunate test of pkg-generic.mk is failing and causes the compiling to stop.

in pkg-generic.mk there is the following case:

define step_check_build_dir_one
        if [ -d $(2) ]; then \
                printf "%s: installs files in %s\n" $(1) $(2) >&2; \
                exit 1; \
        fi
endef

$(2) is this odd path that looks like it was falsely glued together "home/asterix/buildroot/buildroot-2020.05.2/output/host/arm-buildroot-linux-uclibcgnueabihf/sysroot//home/asterix/buildroot/buildroot-2020.05.2/output/host/lib/python2.7/site-packages/gps" and is supposed to fail. Since gpsd sadly created that path this test is successing and stops the whole buildroot compile. gpsd wasn't as innocent as I thought it would be... Still need to find out why gpsd uses that staging directory as root and not the usual root.

Regards Florian

Am 17.06.20 um 08:56 schrieb Florian Kiera:

> Hey
>       Gary!
>       
>       
>       Am 16.06.20 um 21:34 schrieb Gary E. Miller:
>       
> > Yo Florian!
> >         
> >         
> >         On Tue, 16 Jun 2020 17:08:35 +0200
> >         
> >         Florian Kiera <florian.kiera@logicway.de> wrote:
> >         
> >         
> > > Doesn't use LD anymore, so that works
> > >           now! Thank you for fixing it!
> > >           
> > >         
> >         Thank you for your patience.  It was a weird one.
> >         
> >         
> > > The other issue regarding libtools; I
> > >           guess it is coming from
> > >           
> > >           python3/python2 conflicts...
> > >           
> > >         
> >         Nope.  Your log shows scons built and installed everything fine.
> >         
> >         
> >          From your log.  Here is the last file installed:
> >         
> >         
> > > Install file:
> > >           "packaging/X11/gpsd-logo.png" as
> > > "/home/asterix/buildroot/buildroot-2019.02.8.1/output/host/arm-buildroot-linux-uclibcgnueabihf/sysroot/usr/share/gpsd/icons/gpsd-logo.png"
> > >         
> >         Here is sconss saying it is done building/installing:
> >         
> >         
> > > scons: done building targets.
> > >           
> > >         
> >       
>       Yes, thats why I guess gpsd is innocent here (as well as it
>       appears on other modules too).
>       
> > Thsn, dunno where this comes from:
> >         
> >         
> > > >>> gpsd 3.20.1~dev Fixing
> > >           libtool files
> > >           
> > >           for la in $(find
> > > /home/asterix/buildroot/buildroot-2019.02.8.1/output/host/arm-buildroot-linux-uclibcgnueabihf/sysroot/usr/lib*
> > >           -name "*.la"); do \
> > >           
> > >               cp -a "${la}" "${la}.fixed" && \
> > >           
> > >         
> >       
>       
>       From a pkg-generic.mk file that is basically used to iterate over
>       the packages. Still its odd that it worked along with python2 but
>       not python3. May its just the way "I update" the python... Cannot
>       help myself differently yet.
>       
>       
> > It is NOT part of gpsd:
> >         
> >         
> >         gpsd # fgrep linktool * -r
> >         
> >         gpsd #
> >         
> >         
> >         No libtool anywhere.
> >         
> >         
> >         It is also NOT part of scons:
> >         
> >         
> >         gpsd # fgrep libtool /usr/lib64/python3.6/site-packages/SCons/
> >         -R
> >         
> >         gpsd #
> >         
> >         
> >         No libtool anywhere.
> >         
> >         
> >         I'm still looking at it, may take a while for enlightenment.
> >         
> >         
> > > I will try to remove python2 entirely
> > >           
> > >           from our buildroot and than just stick to python3.
> > >           
> > >         
> >         Does not matter.  scons uses the python that it started with. 
> >         Python
> >         
> >         slotting works pretty well on all distros.  And your scons
> >         worked
> >         
> >         seemingly perfectly for you.  You turned off all use of Python
> >         except
> >         
> >         for scons.
> >         
> >       
>       Well using the common python2 didnt made me any trouble at all, so
>       it must be python3 (adding python3 broke it all). I mean its maybe
>       not clever to update python itself and leave the modules of python
>       in the old dust; reason I am updating buildroot as whole at the
>       moment to get a newer version (that should work fine with
>       python3). And yes the libtool part isnt from gpsd but from
>       buildroot. I dont know for sure what libtools purpose is, haven't
>       saw it while compiling before. Might just have overlooked it since
>       it all runs so fast through.
>       
> >         
> > > Either way it happens to multiple
> > >           packages, since I am messing around
> > >           
> > >           with python3, so gpsd might be innocent here...
> > >           
> > >         
> >         You see this on packages that are not gpsd?  Looks to me like a
> >         bulidroot
> >         
> >         problem.  A quick google shows several libtool issues with
> >         builtroot, but
> >         
> >         I do not understand them.
> >         
> >         
> >         Also from the build log:
> >         
> >         
> >              Applying 0001-SConstruct-do-not-force-O2-by-default.patch
> >         using patch:
> >         
> >         
> >         You turn off -O2 several places, then turn it back on...
> >         
> >       
>       Yes. Neither do I yet!
>       
> > > Also the gpsd.mk if you wanna know what
> > >           exactly is beeing done. (Its
> > >           
> > >           the default one from the buildroot-2020.05 just with an edited
> > >           
> > >           version)
> > >           
> > >         
> >         Ugh.  I guess someone loves it somewhere...
> >         
> >         
> >         gpsd does not support anything earlier than C99, so if this
> >         actually worked
> >         
> >         if would break things:
> >         
> >         
> >              GPSD_CFLAGS += -std=gnu++98
> >         
> >              GPSD_CXXFLAGS += -std=gnu++98
> >         
> >       
>       Good to know! Weird it was used on gpsd-3.19. Will remove it for
>       future compilations than.
>       
> >         
> >         Fixed port speed is gone:
> >         
> >         
> >         ifeq ($(BR2_PACKAGE_GPSD_FIXED_PORT_SPEED),y)
> >         
> >         GPSD_SCONS_OPTS +=
> >         fixed_port_speed=$(BR2_PACKAGE_GPSD_FIXED_PORT_SPEED_VALUE)
> >         
> >         endif
> >         
> >         
> >         Other options are also gone.  You should recheck you mk file
> >         against
> >         
> >         current bulid options.
> >         
> >       
>       
>       Is fixed port speed necessary? What I basically wanna do is: run a
>       M8P chip on 2 different boards, while one can be the base, the
>       other one the rover and use PPS.
>       
>       
>       BR2 vars are set through make menuconfig and safed somewhere in
>       Config.in files in buildroot, can paste that one here as well
>       (there you will see several options are checked). Should've pasted
>       that along with the .mk file here...
>       
>       
>       After all I know less than you why it isn't working yet, but I
>       hope updating buildroot fixes it since it also uses python3 from
>       the start.
>       
>       
>       I am wondering now if it is just the way I "updated" python2 to
>       python3... May shouldve done that before compiling everything...
>       Still think it wont fix the path issue.
>       
>       
>       pkg-generic.mk: If you want to have a look into the file
>       
>       
>       gpsd-settings.png the make menuconfig settings of what should be
>       build with gpsd.
>       
>       
>       Regards Florian
>       
>       
>