add script for cross-compilation of bffh

cross-build.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+# this scripts compiles bffh for all target architectures which are defined in Cross.toml (using cross_rs). 
+# We use cross_rs because it supports easy and successful cross compilation for different architectures with less efforts
+# For this we install podman by default
+
+# requirements
+# - this script only runs on debianoid OS (Debian, Ubuntu, Kubuntu, ... having dpkg)
+
+echo -e "\n+++++++++++++++++++++++++++++++++++++++++++"
+echo -e "installing requirements ..."
+echo -e "+++++++++++++++++++++++++++++++++++++++++++\n"
+sudo apt install podman
+cargo install cross
+
+echo -e "\n+++++++++++++++++++++++++++++++++++++++++++"
+echo -e "gathering some general info ..."
+echo -e "+++++++++++++++++++++++++++++++++++++++++++\n"
+dpkg-architecture | grep DEB_HOST_ARCH_CPU
+dpkg-architecture | grep DEB_HOST_MULTIARCH
+
+# this generates bffhd and fabfire_provision binary files in target/<architecture>/ dir
+# we compile for amd64 (x86_64) using native "cargo build --release". Other architectures we use podman + cross_rs
+echo -e "\n+++++++++++++++++++++++++++++++++++++++++++"
+echo -e "cross-compiling ..."
+echo -e "+++++++++++++++++++++++++++++++++++++++++++\n"
+time cargo build --release
+time cross build --target aarch64-unknown-linux-gnu --release
+time cross build --target=armv7-unknown-linux-gnueabihf --release