Cross Compilation

Configuring a cross-compilation build environment

This builds the library based on the G++ compiler and its supplemental packages.
This will allow you to build native binaries for

• Windows: x86, x86_64 using mingw-w64
• Windows: arm64 (aarch64) using clang llvm-mingw wrapper
• Linux: arm, arm64 (aarch64) and ppc64

Prerequisites

Starting point: A clean Ubuntu install with latest patches applied, one of:

• Ubunutu 14.04 Trusty Tahr
• Ubunutu 16.04 Xenial Xerus
• Ubunutu 20.04 Focal Fossa

(other platforms will work, but the package names and commands may vary)

Windows 32-bit

1. Install dependencies

sudo apt-get install mingw-w64 binutils-mingw-w64-i686

2. Cross-compile using mingw32 toolchain

mvn -P mingw32

Windows 64-bit

1. Install dependencies

sudo apt-get install mingw-w64

2. Cross-compile using mingw32 toolchain

mvn -P mingw64

Windows ARM 64-bit

Note: Glibc 2.7+ required (Ubuntu 20.04+)

1. Install dependencies sudo apt-get install clang

2. Cross-compile using `mingwaarch64` toolchain (cmake will download automatically)
```bash
mvn -P mingwaarch64

Linux ARM 32-bit

1. Install dependencies

sudo apt-get install g++-arm-linux-gnueabihf

2. Cross-compile using armhf toolchain

mvn -P armhf

Linux ARM 64-bit

1. Install dependencies

sudo apt-get install g++-aarch64-linux-gnu

2. Cross-compile using aarch64 toolchain

mvn -P linux-aarch64

Linux PPC 64-bit

1. Install dependencies

sudo apt-get install g++-powerpc64le-linux-gnu

2. Cross-compile using ppc64 toolchain

mvn -P ppc64