diff options
Diffstat (limited to 'tests/ui/foreign/foreign-fn-linkname.rs')
-rw-r--r-- | tests/ui/foreign/foreign-fn-linkname.rs | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/tests/ui/foreign/foreign-fn-linkname.rs b/tests/ui/foreign/foreign-fn-linkname.rs new file mode 100644 index 000000000..f6d820594 --- /dev/null +++ b/tests/ui/foreign/foreign-fn-linkname.rs @@ -0,0 +1,28 @@ +// run-pass +// ignore-wasm32-bare no libc to test ffi with +// ignore-sgx no libc + +#![feature(rustc_private)] + +extern crate libc; +use std::ffi::CString; + +mod mlibc { + use libc::{c_char, size_t}; + + extern "C" { + #[link_name = "strlen"] + pub fn my_strlen(str: *const c_char) -> size_t; + } +} + +fn strlen(str: String) -> usize { + // C string is terminated with a zero + let s = CString::new(str).unwrap(); + unsafe { mlibc::my_strlen(s.as_ptr()) as usize } +} + +pub fn main() { + let len = strlen("Rust".to_string()); + assert_eq!(len, 4); +} |