rustc_target/spec/base/
windows_gnullvm.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
use std::borrow::Cow;

use crate::spec::{Cc, DebuginfoKind, LinkerFlavor, Lld, SplitDebuginfo, TargetOptions, cvs};

pub(crate) fn opts() -> TargetOptions {
    // We cannot use `-nodefaultlibs` because compiler-rt has to be passed
    // as a path since it's not added to linker search path by the default.
    // There were attempts to make it behave like libgcc (so one can just use -l<name>)
    // but LLVM maintainers rejected it: https://reviews.llvm.org/D51440
    let pre_link_args = TargetOptions::link_args(LinkerFlavor::Gnu(Cc::Yes, Lld::No), &[
        "-nolibc",
        "--unwindlib=none",
    ]);
    // Order of `late_link_args*` does not matter with LLD.
    let late_link_args = TargetOptions::link_args(LinkerFlavor::Gnu(Cc::Yes, Lld::No), &[
        "-lmingw32",
        "-lmingwex",
        "-lmsvcrt",
        "-lkernel32",
        "-luser32",
    ]);

    TargetOptions {
        os: "windows".into(),
        env: "gnu".into(),
        vendor: "pc".into(),
        abi: "llvm".into(),
        linker: Some("clang".into()),
        dynamic_linking: true,
        dll_tls_export: false,
        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,
        late_link_args,
        abi_return_struct_as_int: true,
        emit_debug_gdb_scripts: false,
        requires_uwtable: true,
        eh_frame_header: false,
        no_default_libraries: false,
        has_thread_local: true,
        // FIXME(davidtwco): Support Split DWARF on Windows GNU - may require LLVM changes to
        // output DWO, despite using DWARF, doesn't use ELF..
        debuginfo_kind: DebuginfoKind::Pdb,
        supported_split_debuginfo: Cow::Borrowed(&[SplitDebuginfo::Off]),
        ..Default::default()
    }
}