- Os X Cross Compile For Raspberry Pi Download
- Raspberry Pi Cross Compiler Linux
- Os X Cross Compile For Raspberry Pi 1
- Qt Cross Compile Raspberry Pi
- Raspberry Pi Cross Compiler Windows
- Os X Cross Compile For Raspberry Pi 3
Of course, we'll start the list with Raspberry Pi's own operating system, Raspbian. This OS is a gimme because it was entirely created with Raspberry Pi in mind. The day after announcing Raspberry Pi 4, the Raspberry Pi Foundation recently announced the Raspbian 'Buster' update. This update accommodates the RPi 4's new features, addresses some.
< Raspberry Pi
- Jun 02, 2017 A simple way to program Raspberry pi from Windows. Debian C/C Cross-Compilation for Embedded Linux using Eclipse (Luna), CDT, RSE & Remote Debug - Duration: 39:07. Derek Molloy 71,873 views.
- To summarize, yes it is, but building a cross-compiler is not a trivial task for most people; I recently used crosstool-NG to do it which A) made the procedure pretty painless, B) produced a c/c compiler that works to compile executables for the pi.
Building almost anything on the Raspberry Pi takes a very, very long time - especially when a lot of dependencies are involved.
Fortunately, it is possible to offload much of the heavy lifting to a more powerful system (such as your main Gentoo desktop/server) using distcc and crossdev (though this will only work for packages that are written in language that require compiling).
Note
The following guide works for Raspberry Pi 1, 2 and Raspberry Pi 3 B running in 32-bit mode (recommended). Raspberry Pi 3 B running in 64 bit mode is not covered by this documentation.
The following guide works for Raspberry Pi 1, 2 and Raspberry Pi 3 B running in 32-bit mode (recommended). Raspberry Pi 3 B running in 64 bit mode is not covered by this documentation.
- 1distcc
- 1.1Raspberry Pi and build server(s)
distcc
It is also suggested that the first package you build on the Raspberry Pi should be distcc, as it will dramatically speed up subsequent packages that require a lot of compilation.
Raspberry Pi and build server(s)
On the Raspberry Pi and on all build servers install sys-devel/distcc:
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OpenRC
Edit the distcc config file to ensure it is on the right subnet for the network configuration. For example:
FILE
/etc/conf.d/distccd
Systemd
When using systemd edit the config file for the systemd service:
FILE
/etc/systemd/system/distccd.service.d/00gentoo.conf
.
Then register and start the distcc daemon:
root #
rc-config start distccd
Or for systemd:
root #
systemctl start distccd
Raspberry Pi only
Tell Portage to use distcc:
(Optional) Also add
buildpkg
to the FEATURES variable to tell the Raspberry Pi to build package files for everything it builds (if you want to use the same setup on multiple Raspberry Pis without recompiling).Edit the distcc host file to tell your Raspberry Pi to submit compile jobs to the server:
FILE
/etc/distcc/hosts
Now you will need to tell distcc the specific compiler name to use instead of just 'gcc':[1]
root #
ls -l
We need to replace those symlinks with the following script:
FILE
/usr/lib/distcc/bin/armv6j-unknown-linux-gnueabihf-wrapper
Distcc crossdev wrapper fileroot #
chmod a+x /usr/lib/distcc/bin/armv6j-unknown-linux-gnueabihf-wrapper
root #
ln -s armv6j-unknown-linux-gnueabihf-wrapper cc
root #
ln -s armv6j-unknown-linux-gnueabihf-wrapper gcc
root #
ln -s armv6j-unknown-linux-gnueabihf-wrapper g++
root #
ln -s armv6j-unknown-linux-gnueabihf-wrapper c++
Double check that you did things right:
You can now check what is being dispatched to your build machines while doing an emerge operation:
root #
DISTCC_DIR='/var/tmp/portage/.distcc/' distccmon-text 1
crossdev
This will setup crossdev on your build servers so that they can compile binaries compatible with the Raspberry Pi. Note that you can have multiple compilation nodes - just add them to the list of hosts on the Raspberry Pi. Distcc will decide when to distribute the compilation though, so chances are you will never be able to fully load even a single modern build server with jobs from the Raspberry Pi.
Install sys-devel/crossdev:
You will need to maintain separate portage profiles for the Raspberry Pi and your server's default, so you must convert your existing profile files to folders.
Copy the following file to ~/convert-profile-to-files.sh, and then run it as root:
FILE
~/convert-profile-to-files.sh
Convert profile files to foldersCreate a cross toolchain for ARM: (drop the
-S
option from the command when planning to run an unstable system):root #
crossdev -S -v -t armv6j-unknown-linux-gnueabihf
If the cross toolchain for ARM fail to build try this:
root #
CFLAGS='-O2 -pipe' CXXFLAGS='${CFLAGS}' crossdev -S -v -t armv6j-unknown-linux-gnueabihf
See also
External resources
- DistCC Cross-compiling Guide - Provides information about cross-compiling with DistCC
References
As promised in the previous blog post I will outline how we can leverage multiarch in order to speed up the compilation process for the Raspberry Pi.
Raspbian is mainly a recompiled Debian. The recompilation was necessary because the official Debian armhf port requires an ARMv7-A capable CPU while the Pi 1 and Pi Zero are only equipped with an ARMv6 capable CPU.
I rather prefer to automate things instead of writing lengthy instructions and therefore a few steps will be sufficientto start the cross compilation adventure on an Ubuntu (16.04 or newer, amd64 architecture required) host:
Update - 26-March-2018
Due to the great demand, I finally upgraded the setup to Raspbian stretch! You can now enjoy gcc 6.3 within thecross compilation container. The instructions below do now reflect this version change.
Update - 18-October-2019
An updated setup for Raspbian buster is available!
Container Setup
Os X Cross Compile For Raspberry Pi Download
The following repository contains the container setup instructions:
Under the assumption that edi is already installed, we can directlygenerate our mulitarch cross compilation container:
And enter it (password is ChangeMe!, you can change it using
passwd
):That’s it - we are ready to cross compile a program:
Hello World
We change into the shared workspace folder edi-workspace and within the subfolder hello we write some code:
And we compile it using the pre installed C++ cross compiler:
And obviously - we want to test our brand new executable:
But wait - why were we able to run this binary? Just in case we do not trust the cross compiler we can verify that it is indeed an armhf binary:
file hello-raspbian
. If you are still thinking that this executable is not trustworthythen you are welcome to download it to your Raspberry Pi and execute it there.If you really want to know why we were just able to run this armhf binary within the amd64 container then you can runthe following command:
Maybe we are now curious where we got this shiny cross compiler from. The following commands
will reveal that the cross compiler got downloaded from a custom repository.The reason for having this custom repository is that I had to recompile some Debian binaries in order to garanteecorrect cross compilation with the options
-march=armv6 -mfpu=vfp
instead of-march=armv7-a -mfpu=vfpv3-d16 -mthumb
.Obviously, a hello world program is boring and we will now do something that will break our Raspberry Pi ssh access if weshould have done something wrong with the cross toolchain:
Recompilation of the SSL Library
Like within the previous blog post we fetch the source code:
And we compile it:
As expected, this was seven times faster than on the Raspberry Pi 3 Model B.
Now it is time for the risky part of the game. We copy this library to the Raspberry Pi using ssh and we hope that thesubsequent installation will not brick our ssh access:
You have been warned - I really bricked my ssh access once when I tried to install binaries that were compiledwithout the adjusted compiler settings.
Let us see whether we have more luck this time:
Uff - everything went well!
The following example will show us the cross compilation of a package with slightly more dependencies:
Recompilation of man-db
Raspberry Pi Cross Compiler Linux
First we fetch the source code of man-db (the tools that deal with man pages). This was a truly random choice of a packagethat contains executables. Within the container raspbian-jessie-cross we execute the following commands:
man-db is with regards to dependencies slightly more complex than the openssl library and therefore we need some build dependencies:
Now we have green lights for the man-db build:
Out of curiosity we can install this package on the Raspberry Pi:
With the commmand
man man
we can verify that the cross compiled binary seems to work fine on the Raspberry Pi.Conclusion
Os X Cross Compile For Raspberry Pi 1
With the above description only a few steps are needed to prepare a cross development toolchain for Raspbian. The tricky part of the setup is hidden behind an Ansible playbook that is kicked off by the tooledi.If you are interested in the details you can take a look at the playbook that is part of the edi-raspbian git repository.
Qt Cross Compile Raspberry Pi
With the very same toolchain I have also successfully compiled a recent Raspberry Pi kernel.
Raspberry Pi Cross Compiler Windows
Everything above is still new and experimental and I do not expect it to work under all circumstances. I am sure that thereare more knowledgeable people around than me who can improve the above setup. Pull requests or constructive comments arehighly appreciated!
Further Reading
Please read this blog post if you are interested in runningpure Debian on a Raspberry Pi 2 or 3.
If you would like to add your favourite integrated development environment (IDE) to your cross compilationtoolchain you can read on here.
Os X Cross Compile For Raspberry Pi 3
You can also take a look at the presentation I did for anembedded GNU/Linux developer meetup.