Build native library for freebsd-aarch64

Author: matthiasblaesing

CHANGES.md

@@ -7,6 +7,7 @@ Next Release (5.15.0)
 
 Features
 --------
+* [#1578](https://github.com/java-native-access/jna/pull/1578): Add support for FreeBSD aarch64 - [@alexdupre](https://github.com/alexdupre).
 
 Bug Fixes
 ---------

lib/native/freebsd-aarch64.jar

@@ -0,0 +1,60 @@
+Building JNA for FreeBSD
+========================
+
+This recipe was used to build the FreeBSD aarch64 native library on amd64:
+
+```
+# Fetch FreeBSD 13.2 image and extract it
+wget https://download.freebsd.org/snapshots/VM-IMAGES/13.2-STABLE/aarch64/20231216/FreeBSD-13.2-STABLE-arm64-aarch64-20231216-9986fd59d855-256898.qcow2.xz
+xz -d FreeBSD-13.2-STABLE-arm64-aarch64-20231216-9986fd59d855-256898.qcow2.xz
+
+# Ensure there is enough space in the image
+qemu-img resize FreeBSD-13.2-STABLE-arm64-aarch64-20231216-9986fd59d855-256898.qcow2 +5G
+
+# Launch aarch64 emulator with downloaded image
+qemu-system-aarch64 -m 4096M -cpu cortex-a57 -M virt  \
+        -bios /usr/lib/u-boot/qemu_arm64/u-boot.bin \
+        -serial telnet::4444,server -nographic \
+        -drive if=none,file=PATH_TO_IMAGE/FreeBSD-13.2-STABLE-arm64-aarch64-20231216-9986fd59d855-256898.qcow2,id=hd0 \
+        -device virtio-blk-device,drive=hd0 \
+        -device virtio-net-device,netdev=net0 \
+        -netdev user,id=net0
+
+# Connect to terminal for emulated system and boot into single user mode with default shell
+telnet localhost 4444
+
+# Resize partitions
+gpart show /dev/vtbd0
+gpart recover /dev/vtbd0
+gpart show /dev/vtbd0
+gpart resize -i 3 /dev/vtbd0
+growfs /
+
+# Exit single user mode (BSD boots to multi-user)
+exit
+
+# Login as root
+
+# Install prerequisites - part 1 - java, build system, rsync
+pkg install openjdk17 wget automake rsync gmake gcc
+# Adjust fstab (optional, only needed if reboot is planned)
+# fdesc   /dev/fd         fdescfs         rw      0       0
+# proc    /proc           procfs          rw      0       0
+
+# Install prerequisites - part 2 - ant
+wget https://dlcdn.apache.org//ant/binaries/apache-ant-1.10.14-bin.zip 
+unzip apache-ant-1.10.14-bin.zip
+
+# Transfer JNA source code to build environment
+rsync -a --exclude=.git USER@BUILD_HOST:src/jnalib/ jnalib/
+
+# Set current date and time (YYYYMMDDHHMM)
+date 202312231627
+
+# Build JNA and run unittests
+cd jnalib
+/root/apache-ant-1.10.14/bin/ant
+
+# Copy jna native library back to host system
+
+```