1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
12 use target::{LinkArgs, TargetOptions, RelroLevel};
13 use std::default::Default;
15 pub fn opts() -> TargetOptions {
16 let mut args = LinkArgs::new();
17 args.insert(LinkerFlavor::Gcc, vec![
18 // We want to be able to strip as much executable code as possible
19 // from the linker command line, and this flag indicates to the
20 // linker that it can avoid linking in dynamic libraries that don't
21 // actually satisfy any symbols up to that point (as with many other
22 // resolutions the linker does). This option only applies to all
23 // following libraries so we're sure to pass it as one of the first
25 "-Wl,--as-needed".to_string(),
27 // Always enable NX protection when it is available
28 "-Wl,-z,noexecstack".to_string(),
32 dynamic_linking: true,
34 target_family: Some("unix".to_string()),
38 position_independent_executables: true,
39 relro_level: RelroLevel::Full,
40 exe_allocation_crate: super::maybe_jemalloc(),