How do I specify which compiler toolchain Yocto uses to build images? - external

For example how could I get my image to be compiled using:
gcc-linaro-arm-linux-gnueabihf-4.7-2013.03-20130313_linux
?
What does core-image-sato has to do with the toolchains (they supply with Yocto)?
I don't understand...

in local.conf, specify the path of your toolchain in your system.
EXTERNAL_TOOLCHAIN = "/home/manjunath/linaro/gcc-linaro-arm-linux-gnueabihf-4.7-2014.11-20121123_linux"
In your original toolchain distro add toolchain-external-linaro.inc
More specifically
you get a directory named meta-linaro-toolchain. you may copy complete or
Add .inc to your distribution (sources/poky/meta-yocto/conf/distro/ in my case)
Try now ...

Related

How can I add a *.hx file support in opengrok?

I have a legacy C project which is using *.hx as a customized header file suffix. I'm trying to using opengrok to read the code. But it doesn't support this file extension.
I tried to modify the SUFFIX in
OpenGrok-0.12-stable\src\org\opensolaris\opengrok\analysis\c\CAnalyzerFactory.java
and compile to get the opengrok.jar
but it doesn't help.
Check the CLI options to opengrok.jar, especially the -A option.

Finding CUDA_SDK_ROOT_DIR

I am trying to set up Point Cloud Library trunk build with CUDA options enabled.
I believe I have installed CUDA correctly, following these instructions.
In the cmake options for the PCL build, some options are unrecognised:
Is there something I can manually set CUDA_SDK_ROOT_DIR to? Likewise for the other unfound options.
CUDA_SDK_ROOT_DIR should be set to the direction in which you installed the NVIDIA's GPU Computing SDK. The GPU Computing SDK is downloadable from the same page at NVIDIA where you downloaded CUDA. By default, this SDK will install to $HOME/NVIDIA_GPU_Computing_SDK. Set it appropriately and then rerun cmake.
Edit:
The CUDA_SDK_ROOT_DIR variable is actually looking for the sub-directory beneath $HOME/NVIDIA_GPU_Computing_SDK that contains the version of CUDA you're using. For me, this is $HOME/NVIDIA_GPU_Computing_SDK/CUDA/v4.1.
The source code for FindCUDA.cmake gives some hints on how this path is found:
########################
# Look for the SDK stuff. As of CUDA 3.0 NVSDKCUDA_ROOT has been replaced with
# NVSDKCOMPUTE_ROOT with the old CUDA C contents moved into the C subdirectory
find_path(CUDA_SDK_ROOT_DIR common/inc/cutil.h
"$ENV{NVSDKCOMPUTE_ROOT}/C"
"$ENV{NVSDKCUDA_ROOT}"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\NVIDIA Corporation\\Installed Products\\NVIDIA SDK 10\\Compute;InstallDir]"
"/Developer/GPU\ Computing/C"
)
I.e. check that NVSDKCOMPUTE_ROOT or NVSDKCUDA_ROOT environment variables are set correctly.
On a Linux machine,..
Add "$ENV{HOME}/NVIDIA_GPU_Computing_SDK/C" to the 'find_path' options in FindCUDA.cmake module: (usr/share/cmake-2.8/Modules/FindCUDA.cmake)
########################
# Look for the SDK stuff. As of CUDA 3.0 NVSDKCUDA_ROOT has been replaced with
# NVSDKCOMPUTE_ROOT with the old CUDA C contents moved into the C subdirectory
find_path(CUDA_SDK_ROOT_DIR common/inc/cutil.h
"$ENV{HOME}/NVIDIA_GPU_Computing_SDK/C"
"$ENV{NVSDKCOMPUTE_ROOT}/C"
"$ENV{NVSDKCUDA_ROOT}"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\NVIDIA Corporation\\Installed Products\\NVIDIA SDK 10\\Compute;InstallDir]"
"/Developer/GPU\ Computing/C"
)
cmake now finds my 4.0 SDK automatically.
But my build still fails to find cutil.h, even though it is there. $HOME/NVIDIA_GPU_Computing_SDK/C/common/inc/cutil.h. I had to add an include flag to the project to get it to finally work. CUDA_NVCC_FLAGS : -I/home/bill/NVIDIA_GPU_Computing_SDK/C/common/inc
Note: -I/$HOME/NVIDIA_GPU_Computing_SDK/C/common/inc does NOT work. (The env $HOME is set correctly.)

How do I build libmySQL?

I aim to integrate libmySQL into my executable instead of using libmySQL.dll.
I use VC++ 2008 # Windows Vista.
I've downloaded "mysql-connector-c-noinstall-6.0.2-win32-vs2005.zip" from
http://dev.mysql.com/downloads/connector/c/
It contains only ".h" files with declarations. Where is the implementation code (".c" files)?
As said, I wish to be able to manipulate the code, build it as a static library (".lib") and finally integrate it into my exe.
How do I do that? Am I looking at the wrong place? Is it available at all? And if/once I do get it, does it require any special compilation? What are the steps?
you should find a .lib inside, .h .lib and .dll are enough to link it to your app
ora select 'source code' as platform instead

How do I include configuration files with Maven Appassembler?

I'm using the Maven Appassembler plugin to package my application. I'd like to package some configuration files with the application. I've found the configurationDirectory and includeConfigurationDirectoryInClasspath parameters, but I haven't found how I should create (and populate) that configuration directory. I've tried putting the files in src/main/resources, but that just puts them in the jar file for my project.
What is the "proper" way to do this, using maven?
Unfortunately this is a limitation of the appassembler plugin in the current release version. Typically, the plugin is used in conjunction with the assembly plugin to produce the final artifact, in which you can include the reference to your configuration directory. However, if you'd like to have a functional structure from just the appassembler plugin you need to manually copy the files into place. An example using the antrun plugin with a src/main/conf directory can be found here: http://svn.apache.org/viewvc/archiva/trunk/archiva-jetty/
By default, the plugin uses the directory src/main/config.
Is possible to change the source for the config files using the parameter <configurationSourceDirectory>src/main/config</configurationSourceDirectory>
When I include the copyConfigurationDirectory property, it copies the config files and bundles them properly.
<configurationDirectory>etc</configurationDirectory>
<configurationSourceDirectory>src/main/config</configurationSourceDirectory>
<copyConfigurationDirectory>true</copyConfigurationDirectory>
I have a different problem though. I would like to filter my config files before copying, which is giving me some trouble.
Apart from that is does not generate the bin scripts for different platforms. The maven-assembly-plugin can create (package(s) {tar.gz, zip}) for distribution. These are configured through a assemble.xml. You specify which files go in (with what options (chmod)), etc. It can also filter files (search/replace values within them). etc.
Years later and in version 1.10 of the plugin there is now a preAssembleDirectory configuration option. Unfortunately I don't find it flexible enough for my needs because it copies directly into assembleDirectory and does not allow to specify a target directory path within assembleDirectory.

Is it possible to browse the source of OpenJDK online?

Is it possible to browse the source code of OpenJDK online, just like I can do with SourceForge's projects? I never used Mercury before, so I felt confused.
(Note: I don't want to download the source. I just want to browse it online, to see how some methods are implemented.)
OpenJDK is now on GitHub: https://github.com/openjdk/jdk
It is a large project, but you will find the implementations of the core classes under jdk/src/java.base/share/classes.
For instance you can find the implementation of java.util.List here.
If you need to browse older versions, you still need to use the old Mercurial interface.
The Mercurial interface there is quite confusing if you are not used to it, and since this is a large project, it can be hard to find what you are looking for.
Here is an example:
To find the JDK6 implementation java.util.List, select jdk6, jdk, select browse. Then browse to src/share/classes/java/util/List.java.
You should end up at http://hg.openjdk.java.net/jdk6/jdk6/jdk/file/tip/src/share/classes/java/util/List.java
The latest JDK 8 OpenJDK Java Class Library source code can be found here: http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/file/tip/src/share/classes/
Here is the basic step to get latest or any released version of Openjdk 8 (or any existing java version) source code, and use them in Eclipse.
Steps:
[browse source]
Open url for jdk, e.g http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/
click tags
choose proper tag, e.g jdk8u73-b02
then click browse,
then browse into folder src/share/classes,
[download source]
then click one of bz2 / zip / gz, to download source in relevant compressed format, (e.g for jdk8u73-b02 in zip format, the url will be: http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/archive/2ab13901d6f1.zip/src/share/classes/)
[use in eclipse]
uncompress it,
zip the folder "classes/", make "classes/" as the root dir of .zip file, (e.g first cd jdk-2ab13901d6f1/src/share/, then zip -r openjdk_8u73_b2_src.zip classes/)
move the created zip file to proper location, it will stay there for a while, (e.g mv openjdk_8u73_b2_src.zip /media/Eric/software/java/jdk/openjdk/openjdk8u73-b02/source/)
in eclipse, specify source file for jars of installed jre, could specify the source attachment for each jar of installed jre respectively, the most common jar is probably rt.jar,
optionally, might need refresh project to make it totally take effect, not sure is that necessary,
test it: in eclipse, ctrl + shift + t, then input Cancellable, select the sun.nio.fs.Cancellable of corresponding installed jre,
if the source code is available, then it's good, because this source is not available in jdk_home/src.zip, it must be from the additional openjdk source,
switch source back: could switch back to use "jdk_home/src.zip", if don't want to use the external openjdk source,
ok
Here's a way to browse the repositories and look at just the bits you want.
http://hg.openjdk.java.net/
Is that what you are asking?
Append a "/file" to the root URLs to view the browser like this:
http://hg.openjdk.java.net/jdk7/jdk7/jdk/file/
http://hg.openjdk.java.net/jdk7/jdk7/hotspot/file
Grepcode.com is great for similar things - not only OpenJDK sources, with searching in classes/methods and links between classes directly in highlighted code:
http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/8-b132/java/net/Socket.java
As mentioned in the other answers, the source code repository is at https://hg.openjdk.java.net
However, the OpenJDK team mirrors some of the projects on GitHub: https://github.com/openjdk
Including the latest Java version project (https://hg.openjdk.java.net/jdk/jdk): https://github.com/openjdk/jdk
Surely http://hg.openjdk.java.net is one good option. The other equally good source is zGrepCode https://zgrepcode.com/java/openjdk/ . It has both Open JDK and Oracle java versions.