2019-02-08 21:00:07 +09:00
|
|
|
use crate::spec::{LinkerFlavor, Target, TargetOptions, TargetResult};
|
2016-04-27 18:02:31 -07:00
|
|
|
|
2016-07-30 15:44:59 -05:00
|
|
|
pub fn target() -> TargetResult {
|
2016-07-26 21:30:02 -05:00
|
|
|
let mut base = super::linux_musl_base::opts();
|
2016-04-27 18:02:31 -07:00
|
|
|
|
|
|
|
|
// Most of these settings are copied from the arm_unknown_linux_gnueabihf
|
|
|
|
|
// target.
|
2019-07-23 20:30:57 +02:00
|
|
|
base.features = "+strict-align,+v6,+vfp2,-d32".to_string();
|
2016-10-03 23:45:40 -05:00
|
|
|
base.max_atomic_width = Some(64);
|
2016-07-30 15:44:59 -05:00
|
|
|
Ok(Target {
|
2016-04-27 18:02:31 -07:00
|
|
|
// It's important we use "gnueabihf" and not "musleabihf" here. LLVM
|
|
|
|
|
// uses it to determine the calling convention and float ABI, and it
|
|
|
|
|
// doesn't support the "musleabihf" value.
|
|
|
|
|
llvm_target: "arm-unknown-linux-gnueabihf".to_string(),
|
|
|
|
|
target_endian: "little".to_string(),
|
|
|
|
|
target_pointer_width: "32".to_string(),
|
2017-09-30 13:47:49 +02:00
|
|
|
target_c_int_width: "32".to_string(),
|
2019-07-07 18:18:02 +02:00
|
|
|
data_layout: "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64".to_string(),
|
2016-04-27 18:02:31 -07:00
|
|
|
arch: "arm".to_string(),
|
|
|
|
|
target_os: "linux".to_string(),
|
2016-07-26 16:17:14 -05:00
|
|
|
target_env: "musl".to_string(),
|
2016-04-27 18:02:31 -07:00
|
|
|
target_vendor: "unknown".to_string(),
|
-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
|
|
|
linker_flavor: LinkerFlavor::Gcc,
|
2016-10-24 11:04:04 +02:00
|
|
|
options: TargetOptions {
|
2020-07-08 09:36:52 -04:00
|
|
|
unsupported_abis: super::arm_base::unsupported_abis(),
|
2019-03-31 23:17:49 +09:00
|
|
|
target_mcount: "\u{1}mcount".to_string(),
|
2019-12-22 17:42:04 -05:00
|
|
|
..base
|
2016-10-24 11:04:04 +02:00
|
|
|
},
|
2016-07-30 15:44:59 -05:00
|
|
|
})
|
2016-04-27 18:02:31 -07:00
|
|
|
}
|