| // Copyright 2014 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| use std::env; |
| |
| use target::TargetOptions; |
| |
| pub fn opts() -> TargetOptions { |
| // ELF TLS is only available in OSX 10.7+. If you try to compile for 10.6 |
| // either the linker will complain if it is used or the binary will end up |
| // segfaulting at runtime when run on 10.6. Rust by default supports OSX |
| // 10.7+, but there is a standard environment variable, |
| // MACOSX_DEPLOYMENT_TARGET, which is used to signal targeting older |
| // versions of OSX. For example compiling on 10.10 with |
| // MACOSX_DEPLOYMENT_TARGET set to 10.6 will cause the linker to generate |
| // warnings about the usage of ELF TLS. |
| // |
| // Here we detect what version is being requested, defaulting to 10.7. ELF |
| // TLS is flagged as enabled if it looks to be supported. |
| let deployment_target = env::var("MACOSX_DEPLOYMENT_TARGET").ok(); |
| let version = deployment_target.as_ref().and_then(|s| { |
| let mut i = s.splitn(2, "."); |
| i.next().and_then(|a| i.next().map(|b| (a, b))) |
| }).and_then(|(a, b)| { |
| a.parse::<u32>().and_then(|a| b.parse::<u32>().map(|b| (a, b))).ok() |
| }).unwrap_or((10, 7)); |
| |
| TargetOptions { |
| // OSX has -dead_strip, which doesn't rely on ffunction_sections |
| function_sections: false, |
| linker: "cc".to_string(), |
| dynamic_linking: true, |
| executables: true, |
| is_like_osx: true, |
| has_rpath: true, |
| dll_prefix: "lib".to_string(), |
| dll_suffix: ".dylib".to_string(), |
| archive_format: "bsd".to_string(), |
| pre_link_args: Vec::new(), |
| exe_allocation_crate: super::maybe_jemalloc(), |
| has_elf_tls: version >= (10, 7), |
| .. Default::default() |
| } |
| } |