| use crate::spec::{LinkArgs, LinkerFlavor, TargetOptions}; |
| use std::default::Default; |
| |
| 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".to_string(), |
| // Always enable DEP (NX bit) when it is available |
| "-Wl,--nxcompat".to_string(), |
| // Do not use the standard system startup files or libraries when linking |
| "-nostdlib".to_string(), |
| ], |
| ); |
| |
| let mut late_link_args = LinkArgs::new(); |
| let mut late_link_args_dynamic = LinkArgs::new(); |
| let mut late_link_args_static = LinkArgs::new(); |
| late_link_args.insert( |
| LinkerFlavor::Gcc, |
| vec![ |
| "-lmingwex".to_string(), |
| "-lmingw32".to_string(), |
| "-lmsvcrt".to_string(), |
| // 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. |
| // Listing the library twice seems to fix that, and seems to also be done |
| // by mingw's gcc (Though not sure if it's done on purpose, or by mistake). |
| // |
| // See https://github.com/rust-lang/rust/pull/47483 |
| "-lmsvcrt".to_string(), |
| "-luser32".to_string(), |
| "-lkernel32".to_string(), |
| ], |
| ); |
| late_link_args_dynamic.insert( |
| LinkerFlavor::Gcc, |
| 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".to_string(), |
| "-lgcc".to_string(), |
| "-lkernel32".to_string(), |
| ], |
| ); |
| late_link_args_static.insert( |
| LinkerFlavor::Gcc, |
| 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".to_string(), |
| "-lgcc_eh".to_string(), |
| "-lpthread".to_string(), |
| // libpthread depends on libmsvcrt, so we need to link it *again*. |
| "-lmsvcrt".to_string(), |
| "-lkernel32".to_string(), |
| ], |
| ); |
| |
| TargetOptions { |
| // FIXME(#13846) this should be enabled for windows |
| function_sections: false, |
| linker: Some("gcc".to_string()), |
| dynamic_linking: true, |
| executables: true, |
| dll_prefix: String::new(), |
| dll_suffix: ".dll".to_string(), |
| exe_suffix: ".exe".to_string(), |
| staticlib_prefix: String::new(), |
| staticlib_suffix: ".lib".to_string(), |
| no_default_libraries: true, |
| target_family: Some("windows".to_string()), |
| is_like_windows: true, |
| allows_weak_linkage: false, |
| pre_link_args, |
| pre_link_objects_exe: vec![ |
| "crt2.o".to_string(), // mingw C runtime initialization for executables |
| "rsbegin.o".to_string(), // Rust compiler runtime initialization, see rsbegin.rs |
| ], |
| pre_link_objects_dll: vec![ |
| "dllcrt2.o".to_string(), // mingw C runtime initialization for dlls |
| "rsbegin.o".to_string(), |
| ], |
| late_link_args, |
| late_link_args_dynamic, |
| late_link_args_static, |
| post_link_objects: vec!["rsend.o".to_string()], |
| abi_return_struct_as_int: true, |
| emit_debug_gdb_scripts: false, |
| requires_uwtable: true, |
| |
| ..Default::default() |
| } |
| } |