The documentation of the linker options --rom_model and --ram_model is inconsistent. For instance, in the compiler manual sub-chapter titled Specifying the Type of Global Variable Initialization it says ...

When you link a C/C++ program, you must use either the --rom_model or --ram_model option.

It also says ...

When you compile and link programs, the --rom_model option is the default.

That is inconsistent.