Linux 32/64bit detection launcher script for intel/AMD architectures. Rename game_64 and game_32 to the 64 and 32 bit binaries for your application. Uncomment LD_LIBRARY_PATH lines if you distribute libs. Inspired by the launcher @flibitijibibo distributes with his games ^_^

game.sh

#!/bin/bash

# Change to the directory that the script and binaries are in
cd "`dirname "$0"`"

# uname provides some system information. -m is the machine hardware name and returns x86_64 for 64 bit kernels.
if [ $(uname -m) == "x86_64" ]; then
	# Print some output to let the user know what's going on
	echo "Running 64 bit"

	# Exporting the libary path is only necessary if you're bundling libraries
	# export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:./lib_64/

	# Run your 64 bit binary
	./game_64
else

	echo "Running 32 bit"

	# Exporting the libary path is only necessary if you're bundling libraries
	# export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:./lib_32/

	# Run your 32 bit binary
	./game_32
fi