Creating an aarch64/arm64-compatible GCC 8.3 Toolchain

Equivalent to GNU Toolchain for the A-profile Architecture Version 8.3-2019.03 (for use with docker on M1 Macs).

Installation

With Docker installed and running, make shell builds the image and drops into a shell inside the container. To minimize conflicts I tried to pick a distro released shortly before the original precompiled toolchains were produced.

After building the first time, make shell will skip building and drop into the shell.

Compilation

Building was a manual process because ABE no longer included isl by default. It went something like this:

wget -P /usr/local/bin https://raw.githubusercontent.com/git/git/master/contrib/workdir/git-new-workdir
chmod +x /usr/local/bin/git-new-workdir

cd ~/
git clone https://git.linaro.org/toolchain/abe.git
cd abe
git checkout -f 1acedaed7871ea2c37dba9a899742d5c1b17a0f1

./configure

./abe.sh --manifest /root/gcc-arm-arm-linux-gnueabihf-abe-manifest.txt --retrieve isl
./abe.sh --manifest /root/gcc-arm-arm-linux-gnueabihf-abe-manifest.txt --retrieve all
./abe.sh --manifest /root/gcc-arm-arm-linux-gnueabihf-abe-manifest.txt --disable make_docs --build gmp
./abe.sh --manifest /root/gcc-arm-arm-linux-gnueabihf-abe-manifest.txt --disable make_docs --build isl
./abe.sh --manifest /root/gcc-arm-arm-linux-gnueabihf-abe-manifest.txt --disable make_docs --build all 

cd builds/destdir/
mv aarch64-unknown-linux-gnu gcc-arm-8.3-2019.03-aarch64-arm-linux-gnueabihf
tar --xz -cvf gcc-arm-8.3-2019.03-aarch64-arm-linux-gnueabihf.tar.xz gcc-arm-8.3-2019.03-aarch64-arm-linux-gnueabihf/
mv gcc-arm-8.3-2019.03-aarch64-arm-linux-gnueabihf aarch64-unknown-linux-gnu
mv gcc-arm-8.3-2019.03-aarch64-arm-linux-gnueabihf.tar.xz ~/workspace
cd -

I hope I never have to do anything like this again...except I did. The very next day.