Copy‑Paste Setup: Build an ARM32/ARM64 Cross‑Compile Environment on Ubuntu

This tutorial targets Ubuntu 18.04, 20.04 and 22.04 and demonstrates how to create a complete ARM32 and ARM64 cross‑compilation environment that can build ARM programs, kernels and drivers on an x86_64 host.

Update package sources and upgrade the system to avoid later dependency errors: sudo apt update && sudo apt upgrade -y Install the basic compilation dependencies that cover most ARM build scenarios:

sudo apt install -y build-essential libc6-dev \
    bison flex libssl-dev \
    libncurses5-dev git make cmake automake autoconf libtool pkg-config

The build-essential package provides gcc, g++, make and related tools; bison and flex are needed for kernel‑related parsing; libssl-dev supplies cryptographic headers.

Install the ARM cross‑compilation toolchains . The guide distinguishes between ARM32 (32‑bit) and ARM64 (AArch64) and shows the commands for each. After installation, source the profile to make the new tools available: source /etc/profile Verify the environment by generating a simple test source file and compiling it with both toolchains:

echo '#include <stdio.h>
int main(){
    printf("ARM Cross Compile Success!
");
    return 0;
}' > test.c

# ARM32 cross‑compile
arm-linux-gnueabihf-gcc test.c -o test_arm32
# ARM64 cross‑compile
aarch64-linux-gnu-gcc test.c -o test_arm64
# Check the binaries
file test_arm32 test_arm64

The file command should report test_arm32 as an ARM32 binary and test_arm64 as an AArch64 binary, confirming that the toolchains work correctly.

If dependency problems or compilation errors occur, the following repair steps are suggested:

# Fix missing dependencies
sudo apt -f install -y
# Reconfigure package database
sudo dpkg --configure -a
# Reinstall the toolchains
sudo apt reinstall gcc-arm-linux-gnueabihf gcc-aarch64-linux-gnu -y

To completely remove the toolchains, use:

# Remove ARM32 toolchain
sudo apt remove -y gcc-arm-linux-gnueabihf g++-arm-linux-gnueabihf
# Remove ARM64 toolchain
sudo apt remove -y gcc-aarch64-linux-gnu g++-aarch64-linux-gnu

With these commands, the tutorial provides a zero‑configuration, copy‑and‑paste solution for setting up, validating, troubleshooting, and optionally uninstalling an ARM cross‑compilation environment on mainstream Ubuntu releases.