Since the Rust compiler integrates the compiler and linker phase, previous Meson versions did not obey link_args, add_project_link_arguments or add_global_link_arguments.
Starting in this version, add_project_link_arguments(), add_global_link_arguments(), and the link_args keyword argument are supported for Rust. They wrap the arguments with -Clink-arg= when invoking rustc, and are only included when creating binary or shared library crates.
Likewise, methods such as has_link_argument() now wrap the arguments being tested with -Clink-arg=.