[yocto] Where to find help for yocto application and and system development

Fri Jan 27 06:51:16 PST 2017

Hello Leon,

Thank you for the answer!

I read the documentation, it doesn't really give me more than general 
hints what to try (or maybe I read at the wrong place). I also read in  
"Embedded Linux Project Using Yocto Project Cookbook". I know that 
bitbake should use autotools somehow. I set up my directories exactly 
like the other projects which work without any issues. The other 
project, however, are simple executables.

What is unclear to me:
To what shall SCR_URI point? The git repo? Downloaded .tar.gz file? The 
source dir copied into the project directory besided the recipe)? I 
tried all these ways already, each bringing up a different error, basically.

Do I need to change do_install() or does the makefile handles it? If I 
interpret the documentation and the book correctly, I don't need to do 
anything more in the recipe...

When I want to fetch from git, it complains about the SRCREF not being 
set. So I tried to set it to the most recent commit of the repo in the 
recipe file, but it gave another error. I also tried to "append" it 
somehow to the git URI which didn't work either.

Note that I need to include the development version of openssl, not 
openssl itself (on Ubuntu host you do something like apt install 
openssl-dev).

The recipe is appended, if it helps:

# Recipe created by recipetool
# This is the basis of a recipe and may need further editing in order to 
be fully functional.
# (Feel free to remove these comments when editing.)
#
# WARNING: the following LICENSE and LIC_FILES_CHKSUM values are best 
guesses - it is
# your responsibility to verify that the values are complete and correct.
LICENSE = "Unknown"
LIC_FILES_CHKSUM = "file://COPYING;md5=c8ee358fdf91d887aa014c8712e8c22d"
SRC_URI[md5sum] = "da7315f9bc22ff4c24a1cef404b4f3a8"
# No information for SRC_URI yet (only an external source tree was 
specified)
SRC_URI = 
"/usr/local/dey-2.0/sources/meta-training/recipes-examples/tr-50/tr-50-0.1/"
#SRC_URI = 
"git://https://github.com/inhedron/libtr50.git;rev=aedc45c4e9a9a9a3aa301616ad03f07b903d9a81"
#SRC_URI = "file:///home/jakob/Downloads/libtr50-0.1.0.tar.gz"
#SRCREF = "aedc45c4e9a9a9a3aa301616ad03f07b903d9a81"

DEPENDS = "openssl "
# NOTE: if this software is not capable of being built in a separate 
build directory
# from the source, you should replace autotools with autotools-brokensep 
in the
# inherit line
inherit autotools

# Specify any options you want to pass to the configure script using 
EXTRA_OECONF:
EXTRA_OECONF = " --with-examples"

#do_install(){
#    eo_runmake install DESTDIR=${D} PREFIX=${D}
#}

Thanks in advance for any answers!

All the best,
Jakob

On 27.01.2017 14:39, Leon Woestenberg wrote:
> Hi Jakob,
>
> welcome on-board.
>
> The Yocto community expects you to re-use the available documentation 
> and online resources (or even offline resources like books) on Yocto 
> or OpenEmbedded. Then if things remains unclear you can ask questions 
> here on the mailing list and on IRC channels yocto.
>
> Your question (and probably a lot of subsequent things you learn on 
> the way) can be answered by the documentation and existing resources.
>
> I would recommend to read the documentation, then find an existing 
> recipe that uses "autotools" and another that DEPENDS on openssl.
>
> There are a lot of resources online:
>
> http://www.yoctoproject.org/docs/1.6.1/dev-manual/dev-manual.html#new-recipe-writing-a-new-recipe
>
> https://www.yoctoproject.org/tools-resources/community/irc
>
> Regards,
>
> Leon.
>
> On Fri, Jan 27, 2017 at 12:43 PM, Jakob Hasse 
> <jakob.hasse at smart-home-technology.ch 
> <mailto:jakob.hasse at smart-home-technology.ch>> wrote:
>
>     Hello,
>
>     I'm beginning with Yocto.
>     I would like to know where to find general help (like a forum, or
>     mailing lists) for my Yocto-related technical problems.
>     Right now I have problems just integrating a library into my
>     build. Later I will also do system development.
>
>     If this helps, a further description of my most urgent problem:
>
>     I want to integrate the tr-50 library, available on github:
>
>     https://github.com/inhedron/libtr50
>     <https://github.com/inhedron/libtr50>
>
>     It is managed via autotools.
>     I built a new project subdirectory in my custom layer for the lib.
>     I built a basic recipe (with some tool) which, in principle should
>     somehow recognize the autotools and build the project then. I
>     changed the SCR_URI to the local .tar.gz file. But when I build,
>     it comes down to this:
>     make: *** No rule to make target 'install'.  Stop.
>     I don't know if and which parameters I should change in the recipe.
>     Another problem is that the lib needs openssl-dev. I can't find
>     how to include openssl-dev into the Yocto build.
>
>     Looking forward for your answers, best regards,
>     Jakob
>
>     -- 
>     Jakob Hasse
>     Software Developement
>
>     E: jakob.hasse at smart-home-technology.ch
>     <mailto:jakob.hasse at smart-home-technology.ch>
>     T: +41 44 552 02 66 <tel:%2B41%2044%20552%2002%2066>
>
>     Smart Home Technology GmbH
>     www.smart-home-technology.ch <http://www.smart-home-technology.ch>
>
>     -- 
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>
>

-- 
Jakob Hasse
Software Developement

E: jakob.hasse at smart-home-technology.ch
T: +41 44 552 02 66

Smart Home Technology GmbH
www.smart-home-technology.ch

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