I am successfully using a .c file with Rust (see this answer). How can I link multiple .c files? I've already tried #![link_args="/c_src/*.c"] with no luck.
- rust-demo
- src
- c_src
- file1.c
- file2.c
- etc...
- main.rs
Edit:
I think a better question would be, how can I simply drop the C source code in my Rust directory and start using it directly by using Rust's link attribute & extern (or any other way) with the above example in mind?
how can I simply drop the C source code in my Rust directory and start using it directly by using Rust's
linkattribute &extern(or any other way)
You can't just put C code into Rust sources and expect it to work. As said in the comments of your other question, the syntax #![link_args="foo.c"] has never be planned to work, and you should not rely on that.
The only thing Rust code can be linked against (except other rust code) is a compiled library (static or dynamic). You need to compile your C files into one or several libraries before being able to call them from your Rust code.
The proper way to do so is adding a build argument in the [package] section of your Cargo.toml, you can thus invoke a makefile that will first build your C files into a static library, and then link your Rust code against it.
All details are provided on the cargo website : http://doc.crates.io/build-script.html
Assuming you're using Cargo, add some sort of script with build = ["gcc ..."] to build them into a proper library, then you only have one thing to specify in #[link_args]
build = ["gcc ..."] to.. Could you be a bit more specific please? Also, is this documented anywhere?
