Add FreeBSD instructions

README.md

@@ -63,6 +63,16 @@ Or if you are using [Chocolatey](https://chocolatey.org/) on Windows
 
 `$ choco install scc`
 
+#### FreeBSD
+
+On FreeBSD, scc is available as a package
+
+`$ pkg install scc`
+
+Or, if you prefer to build from source, you can use the ports tree
+
+`$ cd /usr/ports/devel/scc && make install clean`
+
 #### Manual
 
 Binaries for Windows, GNU/Linux and macOS for both i386 and x86_64 machines are available from the [releases](https://github.com/boyter/scc/releases) page.