| use crate::spec::crt_objects::{self, CrtObjectsFallback}; |
| use crate::spec::{cvs, LinkArgs, LinkerFlavor, LldFlavor, TargetOptions}; |
| |
| pub fn opts() -> TargetOptions { |
| let mut pre_link_args = LinkArgs::new(); |
| pre_link_args.insert( |
| LinkerFlavor::Gcc, |
| vec![ |
| // Tell GCC to avoid linker plugins, because we are not bundling |
| // them with Windows installer, and Rust does its own LTO anyways. |
| "-fno-use-linker-plugin".into(), |
| // Enable ASLR |
| "-Wl,--dynamicbase".into(), |
| // ASLR will rebase it anyway so leaving that option enabled only leads to confusion |
| "-Wl,--disable-auto-image-base".into(), |
| ], |
| ); |
| |
| let mut late_link_args = LinkArgs::new(); |
| let mut late_link_args_dynamic = LinkArgs::new(); |
| let mut late_link_args_static = LinkArgs::new(); |
| // Order of `late_link_args*` was found through trial and error to work with various |
| // mingw-w64 versions (not tested on the CI). It's expected to change from time to time. |
| let mingw_libs = vec![ |
| "-lmsvcrt".into(), |
| "-lmingwex".into(), |
| "-lmingw32".into(), |
| "-lgcc".into(), // alas, mingw* libraries above depend on libgcc |
| // mingw's msvcrt is a weird hybrid import library and static library. |
| // And it seems that the linker fails to use import symbols from msvcrt |
| // that are required from functions in msvcrt in certain cases. For example |
| // `_fmode` that is used by an implementation of `__p__fmode` in x86_64. |
| // The library is purposely listed twice to fix that. |
| // |
| // See https://github.com/rust-lang/rust/pull/47483 for some more details. |
| "-lmsvcrt".into(), |
| "-luser32".into(), |
| "-lkernel32".into(), |
| ]; |
| late_link_args.insert(LinkerFlavor::Gcc, mingw_libs.clone()); |
| late_link_args.insert(LinkerFlavor::Lld(LldFlavor::Ld), mingw_libs); |
| let dynamic_unwind_libs = vec![ |
| // If any of our crates are dynamically linked then we need to use |
| // the shared libgcc_s-dw2-1.dll. This is required to support |
| // unwinding across DLL boundaries. |
| "-lgcc_s".into(), |
| ]; |
| late_link_args_dynamic.insert(LinkerFlavor::Gcc, dynamic_unwind_libs.clone()); |
| late_link_args_dynamic.insert(LinkerFlavor::Lld(LldFlavor::Ld), dynamic_unwind_libs); |
| let static_unwind_libs = vec![ |
| // If all of our crates are statically linked then we can get away |
| // with statically linking the libgcc unwinding code. This allows |
| // binaries to be redistributed without the libgcc_s-dw2-1.dll |
| // dependency, but unfortunately break unwinding across DLL |
| // boundaries when unwinding across FFI boundaries. |
| "-lgcc_eh".into(), |
| "-l:libpthread.a".into(), |
| ]; |
| late_link_args_static.insert(LinkerFlavor::Gcc, static_unwind_libs.clone()); |
| late_link_args_static.insert(LinkerFlavor::Lld(LldFlavor::Ld), static_unwind_libs); |
| |
| TargetOptions { |
| os: "windows".into(), |
| env: "gnu".into(), |
| vendor: "pc".into(), |
| // FIXME(#13846) this should be enabled for windows |
| function_sections: false, |
| linker: Some("gcc".into()), |
| dynamic_linking: true, |
| executables: true, |
| dll_prefix: "".into(), |
| dll_suffix: ".dll".into(), |
| exe_suffix: ".exe".into(), |
| families: cvs!["windows"], |
| is_like_windows: true, |
| allows_weak_linkage: false, |
| pre_link_args, |
| pre_link_objects: crt_objects::pre_mingw(), |
| post_link_objects: crt_objects::post_mingw(), |
| pre_link_objects_fallback: crt_objects::pre_mingw_fallback(), |
| post_link_objects_fallback: crt_objects::post_mingw_fallback(), |
| crt_objects_fallback: Some(CrtObjectsFallback::Mingw), |
| late_link_args, |
| late_link_args_dynamic, |
| late_link_args_static, |
| abi_return_struct_as_int: true, |
| emit_debug_gdb_scripts: false, |
| requires_uwtable: true, |
| eh_frame_header: false, |
| ..Default::default() |
| } |
| } |
