src/librustc_target/spec/windows_base.rs

   1 use crate::spec::{LinkArgs, LinkerFlavor, TargetOptions};
   2 use std::default::Default;
   3
   4 pub fn opts() -> TargetOptions {
   5     let mut pre_link_args = LinkArgs::new();
   6     pre_link_args.insert(
   7         LinkerFlavor::Gcc,
   8         vec![
   9             // Tell GCC to avoid linker plugins, because we are not bundling
  10             // them with Windows installer, and Rust does its own LTO anyways.
  11             "-fno-use-linker-plugin".to_string(),
  12             // Always enable DEP (NX bit) when it is available
  13             "-Wl,--nxcompat".to_string(),
  14             // Do not use the standard system startup files or libraries when linking
  15             "-nostdlib".to_string(),
  16         ],
  17     );
  18
  19     let mut late_link_args = LinkArgs::new();
  20     late_link_args.insert(
  21         LinkerFlavor::Gcc,
  22         vec![
  23             "-lmingwex".to_string(),
  24             "-lmingw32".to_string(),
  25             "-lgcc".to_string(), // alas, mingw* libraries above depend on libgcc
  26             "-lmsvcrt".to_string(),
  27             // mingw's msvcrt is a weird hybrid import library and static library.
  28             // And it seems that the linker fails to use import symbols from msvcrt
  29             // that are required from functions in msvcrt in certain cases. For example
  30             // `_fmode` that is used by an implementation of `__p__fmode` in x86_64.
  31             // Listing the library twice seems to fix that, and seems to also be done
  32             // by mingw's gcc (Though not sure if it's done on purpose, or by mistake).
  33             //
  34             // See https://github.com/rust-lang/rust/pull/47483
  35             "-lmsvcrt".to_string(),
  36             "-luser32".to_string(),
  37             "-lkernel32".to_string(),
  38         ],
  39     );
  40
  41     TargetOptions {
  42         // FIXME(#13846) this should be enabled for windows
  43         function_sections: false,
  44         linker: Some("gcc".to_string()),
  45         dynamic_linking: true,
  46         executables: true,
  47         dll_prefix: String::new(),
  48         dll_suffix: ".dll".to_string(),
  49         exe_suffix: ".exe".to_string(),
  50         staticlib_prefix: String::new(),
  51         staticlib_suffix: ".lib".to_string(),
  52         no_default_libraries: true,
  53         target_family: Some("windows".to_string()),
  54         is_like_windows: true,
  55         allows_weak_linkage: false,
  56         pre_link_args,
  57         pre_link_objects_exe: vec![
  58             "crt2.o".to_string(),    // mingw C runtime initialization for executables
  59             "rsbegin.o".to_string(), // Rust compiler runtime initialization, see rsbegin.rs
  60         ],
  61         pre_link_objects_dll: vec![
  62             "dllcrt2.o".to_string(), // mingw C runtime initialization for dlls
  63             "rsbegin.o".to_string(),
  64         ],
  65         late_link_args,
  66         post_link_objects: vec!["rsend.o".to_string()],
  67         custom_unwind_resume: true,
  68         abi_return_struct_as_int: true,
  69         emit_debug_gdb_scripts: false,
  70         requires_uwtable: true,
  71
  72         ..Default::default()
  73     }
  74 }