hook-s3c / docker-tor-static-armel

Builds an ARM static binary (armel)

docker-tor-static-armel

Builds a tor static binary for ARM (armel)

This was painful to set up, you will find a lot of broken instructions, stackoverflows and forum posts from years back with questions and no solutions.

This is self-contained (in a container), so to build the binary simply run;

# get the source
git clone https://github.com/hook-s3c/docker-tor-static-armel

# build the image
docker build --tag tor-static:armel .

# copy the binary out of the image 
docker run --rm --entrypoint "/bin/bash" -v $(pwd)/output:/output tor-static:armel -c "cp /tor-0.3.3.10/install/bin/tor /output/tor"

• The binary should appear in the output folder.
• The only dependency is having Docker installed on your system.
• If you have multiple cores, try docker build --cpuset-cpus=0,1,2 --tag tor-static:armel . instead.

You're welcome.

Shout out to the original author who did a half-assed job and never published or tested the source to their Docker Hub container, you made my evening hell.

Resources

prebuilt static binaries already out there, some with sources (YMMV / use at your own risk);

• Mips binaries; https://github.com/darkerego/mips-binaries

• Armel binaries; https://github.com/therealsaumil/static-arm-bins

• https://github.com/andrew-d/static-binaries/tree/master/binaries/linux/arm

• https://github.com/ernw/static-toolbox/releases

• http://jensd.be/800/linux/cross-compiling-for-arm-with-ubuntu-16-04-lts

A couple of awesome tutorials for the uninitiated (like me);

• https://medium.com/@jhuang1012bn/static-library-and-shared-library-de6def6b1d3b

• https://medium.com/@jhuang1012bn/static-libraries-in-c-4c9efcd6e168

• https://insinuator.net/2018/02/creating-static-binaries-for-nmap-socat-and-other-tools/

• https://ownyourbits.com/2018/06/13/transparently-running-binaries-from-any-architecture-in-linux-with-qemu-and-binfmt_misc/

• https://stackoverflow.com/questions/12236159/linux-command-file-shows-for-gnu-linux-2-6-24

• https://stackoverflow.com/questions/11841919/cross-compile-openssh-for-arm

• https://tinsuke.wordpress.com/2011/02/17/how-to-cross-compiling-libraries-for-ios-armv6armv7i386/

• https://medium.com/@wolfv/cross-compiling-arm-on-travis-using-clang-and-qemu-2b9702d7c6f3

• https://www.openssl.org/source/

• http://soft-dev-pro.blogspot.com/2014/07/cross-compile-ncurses-for-arm.html

• https://www.cnx-software.com/2013/04/22/how-to-detect-if-an-arm-elf-binary-is-hard-float-armhf-or-soft-float-armel/

• https://stackoverflow.com/questions/12512101/cross-compiling-for-an-embedded-arm-based-linux-system

• https://github.com/cretz/tor-static (x86 only)