2022-04-03 18:42:39 +02:00
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use crate::spec::{
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crt_objects, cvs, LinkArgs, LinkOutputKind, LinkerFlavor, LldFlavor, TargetOptions,
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};
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2022-03-28 01:08:17 +02:00
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2016-10-18 13:43:18 -07:00
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pub fn opts() -> TargetOptions {
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2018-11-22 00:59:37 -08:00
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let mut pre_link_args = LinkArgs::new();
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pre_link_args.insert(
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LinkerFlavor::Lld(LldFlavor::Ld),
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vec
-Z linker-flavor
This patch adds a `-Z linker-flavor` flag to rustc which can be used to invoke
the linker using a different interface.
For example, by default rustc assumes that all the Linux targets will be linked
using GCC. This makes it impossible to use LLD as a linker using just `-C
linker=ld.lld` because that will invoke LLD with invalid command line
arguments. (e.g. rustc will pass -Wl,--gc-sections to LLD but LLD doesn't
understand that; --gc-sections would be the right argument)
With this patch one can pass `-Z linker-flavor=ld` to rustc to invoke the linker
using a LD-like interface. This way, `rustc -C linker=ld.lld -Z
linker-flavor=ld` will invoke LLD with the right arguments.
`-Z linker-flavor` accepts 4 different arguments: `em` (emcc), `ld`,
`gcc`, `msvc` (link.exe). `em`, `gnu` and `msvc` cover all the existing linker
interfaces. `ld` is a new flavor for interfacing GNU's ld and LLD.
This patch also changes target specifications. `linker-flavor` is now a
mandatory field that specifies the *default* linker flavor that the target will
use. This change also makes the linker interface *explicit*; before, it used to
be derived from other fields like linker-is-gnu, is-like-msvc,
is-like-emscripten, etc.
Another change to target specifications is that the fields `pre-link-args`,
`post-link-args` and `late-link-args` now expect a map from flavor to linker
arguments.
``` diff
- "pre-link-args": ["-Wl,--as-needed", "-Wl,-z,-noexecstack"],
+ "pre-link-args": {
+ "gcc": ["-Wl,--as-needed", "-Wl,-z,-noexecstack"],
+ "ld": ["--as-needed", "-z,-noexecstack"],
+ },
```
[breaking-change] for users of custom targets specifications
2017-02-21 14:47:15 -05:00
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],
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);
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2016-10-18 13:43:18 -07:00
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TargetOptions {
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2022-03-22 11:43:05 +01:00
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os: "fuchsia".into(),
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2020-10-08 22:22:28 +03:00
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linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
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2022-03-22 11:43:05 +01:00
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linker: Some("rust-lld".into()),
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2016-10-18 13:43:18 -07:00
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dynamic_linking: true,
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executables: true,
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2022-03-28 01:08:17 +02:00
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families: cvs!["unix"],
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2019-06-25 23:22:45 +02:00
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pre_link_args,
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2020-04-29 20:47:07 +03:00
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pre_link_objects: crt_objects::new(&[
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(LinkOutputKind::DynamicNoPicExe, &["Scrt1.o"]),
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(LinkOutputKind::DynamicPicExe, &["Scrt1.o"]),
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(LinkOutputKind::StaticNoPicExe, &["Scrt1.o"]),
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(LinkOutputKind::StaticPicExe, &["Scrt1.o"]),
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]),
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2016-10-18 13:43:18 -07:00
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position_independent_executables: true,
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2021-12-17 20:56:38 +00:00
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has_thread_local: true,
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2016-10-18 13:43:18 -07:00
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..Default::default()
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}
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}
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