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- เผยแพร่เมื่อ 18 ก.ย. 2024
- In this video I'll explain how to do cross compiling for arm or aarch64 on Debian or Ubuntu. To make the resulting binaries portable, I'll also cover static linking.
It’s not always possible to build directly ARM-based devices, especially when they are limited in resources. The majority of build and developer machines are still on x86 and by using a cross compiler, it is possible to build binaries or executables usable on another architecture. For example, to use your standard PC, most likely x86, to build something that is usable on another machine or device that’s on another architecture, for example 32 bit or 64 bit ARM.
Contents:
- Theoretical explanation for cross compilation
- Cross compile of a basic C program for ARM aarch64
- Cross compilation with configure and make (strace)
- Static linking and advantages/disadvantages
- Cross compiling for ARM using musl (tcpdump).
All info discussed and shown in the video can be found well-documented on my blog, jensd.be, as well. For this video: jensd.be/1126/...
One of the most concise, to the point, knowledge-packed video on YT. Thanks heaps man!
Fully agree! Exactly what I needed to understand this :)
YOU NAILED IT. Spent literally days to move from theory to practice, and you have just smashed it, just like that, making me feel like a noob. Liked and subscribed bro.
Thanks a lot for the nice feedback, makes it worth spending time on this :)
This is exactly what I needed. Building directly on the PinePhone is a pain for larger projects. I knew there had to be a better way!
Good to hear this helped you!
I had been struggling to cross-compile my application for NXP/Freescale i.mx6ul processor. Your article and video provided all the clarifications needed to actually build and copy executable on target machine and simply run it. Many thanks once again.
For even my hello-world I had to pass in -static to get it to run. Great video!
Thanks!
Great video - direct, and to the point. I stopped it multiple times and replicated the steps on my systems to insure I understood. Everything functioned exactly as shown. Thanks again.
very nice simple and easy to understand with an avarage knowledge
Thanks for the excellent introduction. My case is needing aarch64 native extensions for Ruby but built on x86_64, since that's all we have for CI build hosts.
Ur explanation was awesome ..............
Well explained. I wish to see a few more videos on same topic. For example : cross compiling by connecting host machine's root directory by using sshfs and maybe even more practical example with cmake projects. Thanks for informative video .
This video really cleared all of my doubts. Nice work 👍
Job well done!! This is the best video about the topic! Thanks for sharing
You just solved a question i had for years .Thank YOU !
Great to hear!
Very straightforward! thanks
Thanks for the positive feedback :)
Thanks, this is a really good explanation of how cross-compiling works and what you should notice by doing so!~
Thanks, glad it was helpful!
It was a really good explanation! thanks a lot!
Thanks a lot for the nice feedback, good to hear you liked the video :)
Thank you so much. You saved me
Great explanation.
I want to do dynamic linking for my application and my libraries at host machine.
Can someone point me on how to do this? How to find all dependency of my application, group all of them together at build machine. Later at run time at host, provide proper runtime environment variable to correctly run the application.
Looking forward to responses.
Love this ❤
Generally, works fine except for big endian. When using option '-mbig-endian' it's only possible to compile object files. When building shared libraries or ELF files, error "libstdc++.so (wrong file format)" is issued. It seems the linker tries to use the little-endian version of the .so file.
Enjoyed your training video. Have you ever tried to run a source-code security scan, like Fortify SCA for example, on a Linux Cross-Compiler-based software project?
Very clear! Is it possiable to do the dynamic linking?
Sure, that's the default, so if you don't pass the -static compiler flag, it should use dynamic linking
@@jensdbe Thanks for your reply. Is it possiable to install the required arm64 libraries on a amd64 Ubuntu Computer.So I can cross-compile my own library to arm64.
Thank you for the nice video.But i am unable to compile c++ code, the arm c++ compiler throws the error "fatal error: cannot execute ‘cc1plus’: execvp: No such file or directory". Any idea how can i get through?Thanks again.
i used this method ,while cross compilation it displays fatal error linux/init.h not found ,plz tell how to fix it
Muito obrigado por ensinar como complilar para arm, eu estou tentando instalar o yay(aur) no termux e não sei se o yay funciona fora do archlinux, instalei o pacman no termux e configurei tudo certinho mas o yay precisa da linguagem go 1.19 e o termux instala o go 1.12 e não tem o binário pronto em arm, então estou tentando compilar o go 1.19 para instalar o yay no termux.
Conseguiu o que queria amigo?
thank you!
What if I now would like to crosscompile a random other package like tensorflow?
Similar approach for that. Pre-compile any prerequisites by doing ./configure and make. Then do the same for the actual package/binary that you want to compile. As I did for tcpdump in the video.
Usually a bit of reading is required for the specifics/flags for each tool.
Need help with sp805 watchdog timer , pls can you share steps to program its drivers?
I am not familiar with compiled languages. Could someone explain why in many cases (not shown in the video) programs don't work when compiled for a different architecture?
In other words, why can't Apple just re-compile all it's programs so that they work on the M1 chip?
This can get quite complex but, at least as far as I understand it, simply said this is because a lot of tools/programs contain code or instructions tailored to one architecture. This is mainly done to gain performance. By using architecture specific and optimized ways of addressing the hardware and resources you can gain speed. Most CPUs, even when in theory they are on the same architecture have this kind of optimizations. Before you can recompile such code for another architecture, you would need to replace that CPU/arch-specific code with an alternative that works on the new arch. And even if you can, there might be an impact in performance or you might hit other limitations.
@@jensdbe Thanks for the reply!
When you write a program you try to do your best to optimize it. So Apple old software are written in a such way that are optimized on that old arch. That's why it need to rewrite the program to optimize it with their new M1 chip instead of old PowerPC arch to intel x64 Adoption.
v helpful video. thank u
Thanks for the nice feedback :)
thanks man!
Thanks
can you please make videos for android cross compilation and load the lkm from your host machine to target
strace last version doesn't give executable or any file even the compilation doesn't give any error.
Fixed with --prefix=$HOME
Is this can by apply on RasPi 4B on Ubuntu 20.4? I can't install programs because Rasp is aarch64 and programs on Ubuntu are for amd64. Is my assumption is correct?
The easiest if off course to use tools and programs from the Ubuntu aarch64 repositories by using your regular package manager (apt). But if you need to compile something or want it static linked, then this is what you're looking for.
@@jensdbe Thanks for info! Channel subscribe.
Is there a way to cross-compile python script on, let's say Ubuntu, to run on raspberry Pi armv7l? I have been searching a way to do this but haven't been able to get a concrete solution.
Python scrips are generally compiled at runtime so they are platform independent. You just need to have the same libraries installed and they should work
I wish I could donate a better microphone to you
In the meanwhile, I got myself a better microphone, check out my latest videos and hopefully you should see an improvement. Nevertheless, donations are always welcome :)
Can you please make a tutorial how to cross compile a python script?
No, need to know how to compile a firmware image not an executable.