The building needs a modern version `gcc`. Instead of `make isolate` you can also consider to user `make`, which also creates a documentation using `a2x` (this software has then to be installed on your operating system, too).
The building needs a modern version `gcc`. Instead of `make isolate` you can also consider to user `make`, which also creates a documentation using `a2x` (this software has then to be installed on your operating system, too).