572b6a9c60
In accordance with the design from https://github.com/rust-lang/rust/pull/96827#issuecomment-1208441595
106 lines
4.4 KiB
Rust
106 lines
4.4 KiB
Rust
use crate::spec::crt_objects::{self, LinkSelfContainedDefault};
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use crate::spec::{cvs, Cc, DebuginfoKind, LinkerFlavor, Lld, SplitDebuginfo, TargetOptions};
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use std::borrow::Cow;
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pub fn opts() -> TargetOptions {
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let mut pre_link_args = TargetOptions::link_args(
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LinkerFlavor::Gnu(Cc::No, Lld::No),
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&[
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// Enable ASLR
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"--dynamicbase",
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// ASLR will rebase it anyway so leaving that option enabled only leads to confusion
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"--disable-auto-image-base",
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],
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);
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super::add_link_args(
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&mut pre_link_args,
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LinkerFlavor::Gnu(Cc::Yes, Lld::No),
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&[
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// Tell GCC to avoid linker plugins, because we are not bundling
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// them with Windows installer, and Rust does its own LTO anyways.
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"-fno-use-linker-plugin",
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"-Wl,--dynamicbase",
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"-Wl,--disable-auto-image-base",
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],
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);
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// Order of `late_link_args*` was found through trial and error to work with various
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// mingw-w64 versions (not tested on the CI). It's expected to change from time to time.
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let mingw_libs = &[
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"-lmsvcrt",
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"-lmingwex",
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"-lmingw32",
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"-lgcc", // alas, mingw* libraries above depend on libgcc
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// mingw's msvcrt is a weird hybrid import library and static library.
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// And it seems that the linker fails to use import symbols from msvcrt
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// that are required from functions in msvcrt in certain cases. For example
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// `_fmode` that is used by an implementation of `__p__fmode` in x86_64.
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// The library is purposely listed twice to fix that.
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//
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// See https://github.com/rust-lang/rust/pull/47483 for some more details.
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"-lmsvcrt",
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"-luser32",
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"-lkernel32",
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];
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let mut late_link_args =
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TargetOptions::link_args(LinkerFlavor::Gnu(Cc::No, Lld::No), mingw_libs);
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super::add_link_args(&mut late_link_args, LinkerFlavor::Gnu(Cc::Yes, Lld::No), mingw_libs);
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// If any of our crates are dynamically linked then we need to use
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// the shared libgcc_s-dw2-1.dll. This is required to support
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// unwinding across DLL boundaries.
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let dynamic_unwind_libs = &["-lgcc_s"];
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let mut late_link_args_dynamic =
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TargetOptions::link_args(LinkerFlavor::Gnu(Cc::No, Lld::No), dynamic_unwind_libs);
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super::add_link_args(
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&mut late_link_args_dynamic,
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LinkerFlavor::Gnu(Cc::Yes, Lld::No),
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dynamic_unwind_libs,
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);
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// If all of our crates are statically linked then we can get away
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// with statically linking the libgcc unwinding code. This allows
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// binaries to be redistributed without the libgcc_s-dw2-1.dll
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// dependency, but unfortunately break unwinding across DLL
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// boundaries when unwinding across FFI boundaries.
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let static_unwind_libs = &["-lgcc_eh", "-l:libpthread.a"];
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let mut late_link_args_static =
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TargetOptions::link_args(LinkerFlavor::Gnu(Cc::No, Lld::No), static_unwind_libs);
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super::add_link_args(
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&mut late_link_args_static,
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LinkerFlavor::Gnu(Cc::Yes, Lld::No),
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static_unwind_libs,
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);
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TargetOptions {
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os: "windows".into(),
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env: "gnu".into(),
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vendor: "pc".into(),
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// FIXME(#13846) this should be enabled for windows
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function_sections: false,
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linker: Some("gcc".into()),
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dynamic_linking: true,
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dll_prefix: "".into(),
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dll_suffix: ".dll".into(),
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exe_suffix: ".exe".into(),
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families: cvs!["windows"],
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is_like_windows: true,
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allows_weak_linkage: false,
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pre_link_args,
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pre_link_objects: crt_objects::pre_mingw(),
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post_link_objects: crt_objects::post_mingw(),
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pre_link_objects_self_contained: crt_objects::pre_mingw_self_contained(),
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post_link_objects_self_contained: crt_objects::post_mingw_self_contained(),
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link_self_contained: LinkSelfContainedDefault::Mingw,
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late_link_args,
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late_link_args_dynamic,
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late_link_args_static,
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abi_return_struct_as_int: true,
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emit_debug_gdb_scripts: false,
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requires_uwtable: true,
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eh_frame_header: false,
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// FIXME(davidtwco): Support Split DWARF on Windows GNU - may require LLVM changes to
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// output DWO, despite using DWARF, doesn't use ELF..
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debuginfo_kind: DebuginfoKind::Pdb,
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supported_split_debuginfo: Cow::Borrowed(&[SplitDebuginfo::Off]),
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..Default::default()
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}
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}
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