| // Test proc-macro crate can be built without additional RUSTFLAGS |
| // on musl target |
| // override -Ctarget-feature=-crt-static from compiletest |
| //@ compile-flags: --crate-type proc-macro -Ctarget-feature= |
| //@ ignore-sgx no support for proc-macro crate type |
| //@ build-pass |
| //@ force-host |
| //@ no-prefer-dynamic |
| //@ needs-dynamic-linking |
| //@ needs-unwind compiling proc macros with panic=abort causes a warning |
| |
| #![crate_type = "proc-macro"] |
| |
| // FIXME: This don't work when crate-type is specified by attribute |
| // `#![crate_type = "proc-macro"]`, not by `--crate-type=proc-macro` |
| // command line flag. This is because the list of `cfg` symbols is generated |
| // before attributes are parsed. See rustc_interface::util::add_configuration |
| #[cfg(target_feature = "crt-static")] |
| compile_error!("crt-static is enabled"); |
| |
| extern crate proc_macro; |
| |
| use proc_macro::TokenStream; |
| |
| #[proc_macro_derive(Foo)] |
| pub fn derive_foo(input: TokenStream) -> TokenStream { |
| input |
| } |
