Update README

README.md

@@ -30,3 +30,17 @@ array sizes. Stream reports the array size per array and the
 total memory used for the arrays. This is not a 'per cpu'
 memory size. The arrays are shared.
 
+
+# usage
+
+Call `make` to build stream compiled with GCC, with default settings
+(`stream_gcc`) and with streaming stores enables (`stream_gcc_temporal`).
+
+If you have the AMD Optimizing C/C++ Compiler (AOCC) or Intel oneAPI DPC++/C++ Compiler
+available (`aocc` and `icx`, respectively), you can build stream binaries using these
+compilers by calling `make aocc` and `make icx`.
+
+For convenience, the `run-benchmark.sh` script builds all three versions, runs the
+benchmark and stores the results in seperate files. The `make-plot.py` script can be
+used to generate a plot.
+