[Buildroot] Build Issue when depending on systemd

[Buildroot] Build Issue when depending on systemd

[Roman Akopov]

Hello,

I have C++/Qt application which does a lot of things, and among them, 
forwards journald logs to web service. I failed to build it correctly 
under buildroot-2015-02.

Config.in looks like this

config BR2_PACKAGE_DASHBOARD_CLIENT
     bool "dashboard-client"
     depends on BR2_PACKAGE_HAS_LIBEGL
     depends on BR2_PACKAGE_QT5
     depends on BR2_PACKAGE_QT5_GL_AVAILABLE
     depends on BR2_PACKAGE_QT5_JSCORE_AVAILABLE
     depends on BR2_PACKAGE_QT5BASE_EGLFS
     depends on BR2_PACKAGE_QT5BASE_NETWORK
     depends on BR2_PACKAGE_QT5BASE_PNG
     depends on BR2_PACKAGE_QT5BASE_WIDGETS
     depends on BR2_PACKAGE_QT5GRAPHICALEFFECTS
     depends on BR2_PACKAGE_SYSTEMD
     help
       DASHBOARD client

and I get the following compilation error on clean build

fatal error: systemd/sd-journal.h: No such file or directory
  #include <systemd/sd-journal.h>
                                 ^
compilation terminated.

This is because systemd is build after my package, I see this from log. 
If I unselect my package, build system, reselect my package and build 
again everything build just fine. Also,

make dashboard-client-graph-depends

outputs

Getting dependencies for ['dashboard-client']
Getting dependencies for ['toolchain', 'qt5base', 'qt5multimedia', 
'qt5graphicaleffects', 'qt5imageformats', 'qt5declarative', 'qt5webkit']
Getting dependencies for ['host-flex', 'host-bison', 
'toolchain-buildroot', 'libpng', 'host-ruby', 'jpeg', 'host-pkgconf', 
'libegl', 'zlib', 'openssl', 'qt5xmlpatterns', 'sqlite', 'host-gperf', 
'fontconfig', 'pcre', 'icu', 'libgles']
Getting dependencies for ['host-gcc-final', 'jpeg-turbo', 'host-m4', 
'expat', 'readline', 'rpi-userland', 'ncurses', 'host-icu', 'freetype']
Getting dependencies for ['host-libtool', 'host-automake', 'host-gmp', 
'host-autoconf', 'host-mpfr', 'host-binutils', 'host-ncurses', 'glibc', 
'host-mpc', 'host-cmake']
Getting dependencies for ['host-gawk', 'linux-headers', 'host-gcc-initial']

And there is no mention of systemd in generated PDF too.

So either there I declare dependency on systemd incorrectly (then what 
is the correct way?), or there is some dependency resolution problem.

How can I debug this issue?

With best regards,
Roman
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[Buildroot] Build Issue when depending on systemd

[Peter Korsgaard]

>>>>> "Roman" == Roman Akopov <adontz@gmail.com> writes:

 > Hello,
 > I have C++/Qt application which does a lot of things, and among them,
 > forwards journald logs to web service. I failed to build it correctly
 > under buildroot-2015-02.

 > Config.in looks like this

 > config BR2_PACKAGE_DASHBOARD_CLIENT
 >     bool "dashboard-client"
 >     depends on BR2_PACKAGE_HAS_LIBEGL
 >     depends on BR2_PACKAGE_QT5
 >     depends on BR2_PACKAGE_QT5_GL_AVAILABLE
 >     depends on BR2_PACKAGE_QT5_JSCORE_AVAILABLE
 >     depends on BR2_PACKAGE_QT5BASE_EGLFS
 >     depends on BR2_PACKAGE_QT5BASE_NETWORK
 >     depends on BR2_PACKAGE_QT5BASE_PNG
 >     depends on BR2_PACKAGE_QT5BASE_WIDGETS
 >     depends on BR2_PACKAGE_QT5GRAPHICALEFFECTS
 >     depends on BR2_PACKAGE_SYSTEMD
 >     help
 >       DASHBOARD client

 > and I get the following compilation error on clean build

 > fatal error: systemd/sd-journal.h: No such file or directory
 >  #include <systemd/sd-journal.h>
 >                                 ^
 > compilation terminated.

 > This is because systemd is build after my package, I see this from
 > log. If I unselect my package, build system, reselect my package and
 > build again everything build just fine. Also,

Did you add systemd to DASHBOARD_CLIENT_DEPENDENCIES? The select/depends
on in Kconfig only ensures that the packages get built, but it doesn't
affect the build order. If you need systemd to be built before your
application you have to add it to the _DEPENDENCIES make variable.

See the manual for further information:

http://buildroot.net/downloads/manual/manual.html#generic-package-reference

-- 
Bye, Peter Korsgaard