link_args
The tracking issue for this feature is: #29596
You can tell rustc how to customize linking, and that is via the link_args
attribute. This attribute is applied to extern blocks and specifies raw flags
which need to get passed to the linker when producing an artifact. An example
usage would be:
#![feature(link_args)] #[link_args = "-foo -bar -baz"] extern {} # fn main() {}
Note that this feature is currently hidden behind the feature(link_args) gate
because this is not a sanctioned way of performing linking. Right now rustc
shells out to the system linker (gcc on most systems, link.exe on MSVC), so
it makes sense to provide extra command line arguments, but this will not
always be the case. In the future rustc may use LLVM directly to link native
libraries, in which case link_args will have no meaning. You can achieve the
same effect as the link_args attribute with the -C link-args argument to
rustc.
It is highly recommended to not use this attribute, and rather use the more
formal #[link(...)] attribute on extern blocks instead.