added tools, Makefile, and setup

tools/compile

@@ -0,0 +1,25 @@
+#!/bin/bash
+# Use this script to compile your .cc files in dependency order
+
+# Arguments:
+#   $1 = name of file containing list of .cc files
+#   $2 = name of the output file
+
+cxx="g++-11"
+cxxflags="-std=c++20 -fmodules-ts -Wall -g"
+
+if [ $# -lt 1 ]; then
+  echo "Usage:  $0 list-filename [output-name]" 1>&2
+  exit 1
+fi
+
+if [ $# -eq 2 ]; then
+  name="-o $2"
+fi
+
+for x in $(cat $1); do
+  $cxx $cxxflags -c $x
+done
+
+$cxx *.o $name
+