I am trying to add some python libraries to my custom image.
So far, I successfully added some libraries.
Some others, like sqlalchemy, was requiring some python internal module named “dummy_threading” and thus producing some error output stating "No module named ‘dummy_threading’ ".
I found out you can solve this issue by adding ‘python-threading’ to the image.
Unfortunately, I came across a similar issue with the ‘python-requests’ library, which cannot be imported throwing 'No module named ‘cgi’ ".
cgi.py seems to be a python internal module, much like ‘dummy_threading’, but I can’t find a way to include it to my image.
I already tried to add 'python-cgi' with no success.
Does anyone have a solution to this ?
Lucas
Additionnal info:
Yocto 1.7 (I cannot upgrade it to the newest)
Python 2.7.3
Despite poky already contains maybe all what you need regarding python, as you mention, there are some internal parts of python which are provided in a different way.
A good idea to find out how to get what you miss is to inspect the manifest files. Such files can be found in your layers (basically poky and openembedded-core). For example, in poky is located in:
poky/meta/recipes-devtools/python/python-x.y-manifest.inc
If I check inside mine I can see:
FILES_${PN}-netserver="${libdir}/python2.7/cgi.* ${libdir}/python2.7/*HTTPServer.* ${libdir}/python2.7/SocketServer.* "
Notice the cgi. and the FILES_${PN}-netserver.
Finally that would mean that the package you need is actually "python-netserver".
Related
I've started to work with the Yocto project on a raspberry pi 3 and therefore followed the instructions in this guide.
It adds the dropbear ssh server for remote access
EXTRA_IMAGE_FEATURES_append = " ssh-server-dropbear"
After the creation of the image I checked the image manifest and it seems like dropbear has been added.
dropbear aarch64 2019.78
But it seems like when I run the image the application is not really there. I'd expect something inside /etc/init.d/ but there are no dropbear artifacts.
Also, altough the python meta-layer should be added, the py/python command is unknown on the target.
Can someone tell me what exactly I'm missing?
You're not specifying why you believe dropbear is not part of the image, if it is present on EXTRA_IMAGE_FEATURES (and you even see it in the manifest) I don't see any reason why it wouldn't be there, perhaps you are looking for it in the wrong location?
If you can post an update with the actual error you are getting that would help.
python3 does not come from the meta-python layer, it is part of the core layer (meta), meta-python contains other python related recipes which extend python's functionality.
To install python3 on your image do:
IMAGE_INSTALL += "python3"
I am playing around with Microsoft's Q# library, and I've gone through the install, however the build is failing and I am having a tough time figuring out the problem. My first suspicion is Microsoft.Quantum.Canon
EXEC : error QS1001: Assembly E:\Projects\Quantum\Microsoft.Quantum.Canon\bin\Debug\Microsoft.Quantum.Canon.dll not found
I also have noticed Microsoft.Quantum.Canon.nuspec is missing. I've tried to do a Nuget.exe restore on the solutions but that did not work.
Has anyone worked through this?
It's been reported on GitHub already, although it appears to be intentional. See the comments in the .gitignore file:
# These files are generated by bootstrap from a .v.template (version template).
# Any changes must be done to the corresponding the .v.template file directly
Microsoft.Quantum.Canon/Microsoft.Quantum.Canon.nuspec
I can't find any info on this .v.template file, probably it's part of internal Microsoft build tooling. You can copy the template file and fill in the missing parameters if you wish, but the file not existing doesn't make the build fail , does it?
In ubuntu, I export library path while running my scala application to load the .so files. But the files are not loaded. So an exception occurs when I hit my methods. The exception I get is as follows enter image description here
I don't know how to fix this issue. Lib folder contains all those library files needed but still error appears. Particularly it shows libboost_filesystem cannot be loaded. please help me to fix this issue. Thanks for your help.
You need to make sure your libboost libraries are installed and available for the JVM. There are multiple ways to help JVM find those libraries like LD_LIBRARY_PATH or -Djava.library.path=. Check this article for examples: https://www.chilkatsoft.com/java-loadLibrary-Linux.asp.
I'm looking at using Tesseract to do some work with PDF files, and so I want to use the library rather than an external executable.
I started by downloading the full Tesseract source and looking at building that. Sadly the standard sources don't have any means to build on a non-Linux platform, in my case Windows. There are methods for doing so, and I looked at those.
Firstly the VS2008 build doesn't. I'm aware that it need Leptonica, but I figured I'd tackle that afterwards and just tried to build the existing code. Fails with "fatal error C1083: Cannot open include file: 'allheaders.h': No such file or directory". Nothing to do with Leptonica at this stage, it simply doesn't work.
Even if I were able to get past that, I'd have to build Leptonica, and that requires using GNU tools and therefore an installation of Cygwin, so I gave up. I Have a MingW instatllation, (I've never managed to get Cygwin to work in a usable fashion) but I'm not keen enough to mess with such a complicated and fragile build.
So I decided I'd just use the pre-built binaries which some kind soul creates. Downloaded that from code.google.com. Now I need to look into using the code, so the next obvious step is the Tesseract API example, which states it requires "tesseract-ocr-3.02.02-win32-lib-include-dirs.zip", no problem, because I already have that now.
No real clue as to where the API example wants the files to be placed, but a little messing about gets them in appropriate locations. Press build and "fatal error C1083: Cannot open include file: 'allheaders.h': No such file or directory", just like trying to build Tesseract from source.....
And indeed there is no such file.
So, where is this file ?
I also struggled some time ago to make it works under windows and then I found this git repository : https://github.com/charlesw/tesseract-vs2012
It includes all needed extern library (because Tesseract need Leptonica, but Leptonica also need extern library to handle the different image format) and is also working great with vs 2013.
OK so now I see that allheaders.h is part of Leptonica. Still leaves me wondering why the Tesseract pre-built library requires that I have Leptonica available, I would have expected that to be built-in, I guess it isn't.
I'm working in QtQuick and right now struggling with a weird problem: I can't get my custom plugin to work in Qml. There's a simple demo in the SDK (Examples/4.7/declarative/tutorials/extending/chapter6-plugins) and this doesn't work on my computer either. I don't get any error messages except that it doesn't recognize my custom items. Has anybody seen this problem? Any suggestions?
My setup:
Win 7 Home Premium, Qt Creator 2.1.0, Qt 4.7.3 (MinGW 4.4)
Thanks
Beside the qmldir issue already mentioned by blakharaz, also make sure to set QML_IMPORT_PATH in your pro file or setting the path via QDeclarativeEngine::addImportPath() so the module can be found on your development environment (if you don't install them systemwide before using).
And when using subfolders, make sure they are part of the import (see http://doc.qt.nokia.com/4.7-snapshot/qdeclarativemodules.html)
It would be nice to have some code. One possible issue could be the directory structure or the qmldir file. If you want to have a plugin called Foo you basically need a directory Foo which contains the Foo.dll (or libFoo.so) and a qmldir file (content is at least "plugin Foo")
If you have that "import Foo 1.0" should load the library.
I just had the exact same problem.
Build your .dlls as release instead of debug, that fixed it for me.