b6d7eb6364
Some features, such as the Fortran wrappers, are enabled by options, and it may be usable to have those set in a common definition file. However, as these features are included conditionally based on use, their option variables may not exist in other projects, giving a CMake warning for them. Here we list such variables too. Reading them at the end corresponds to the Autotools convention of ignoring unknown --enable-xxx options.