setup.sh: added support for multiple distros

setup.sh

@@ -1,3 +1,40 @@
-#!/bin/sh
+#!/bin/env bash
+
+if [ -f /etc/os-release ]; then
+    . /etc/os-release
+    DIST=$NAME
+elif type lsb_release >/dev/null 2>&1; then
+    DIST=$(lsb_release -si)
+elif [ -f /etc/lsb-release ]; then
+    . /etc/lsb-release
+    DIST=$DISTRIB_ID
+elif [ -f /etc/debian_version ]; then
+    DIST=Debian
+elif [ -f /etc/SuSe-release ]; then
+    DIST=SLES
+fi
+
+case "$DIST" in
+    "Arch Linux")
+        sudo pacman -S --needed --noconfirm aarch64-linux-gnu-gcc arm-none-eabi-gcc
+        echo "Arch does not provide an up-to-date PowerPC gcc compiler, you will have to manually install one."
+        ;;
+    "Debian GNU/Linux" | "Ubuntu")
+        sudo apt install gcc-aarch64-linux-gnu gcc-arm-linux-gnueabi gcc-powerpc-linux-gnu
+        ;;
+    "SLES")
+        # zypper addrepo https://download.opensuse.org/repositories/openSUSE:Factory/standard/openSUSE:Factory.refresh
+        # zypper refresh
+        # zypper install cross-aarch64-gcc7
+        echo "SUSE is not currently supported due to packaging errors"
+        exit
+        ;; #not needed but included for symmetry
+    "Fedora Linux" | "Red Hat Enterprise Linux")
+        dnf -y install gcc-aarch64-linux-gnu.$(uname -m) arm-none-eabi-gcc-cs.$(uname -m) gcc-powerpc64-linux-gnu.$(uname -m)
+        ;;
+    *)
+        echo -E "Script does not currently support installation for $DIST.\nPlease open an issue on the GitHub page detailing what distribution you are using."
+        ;;
+esac   
+
 
-sudo apt install gcc-aarch64-linux-gnu gcc-arm-linux-gnueabi gcc-powerpc-linux-gnu