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Update linker-plugin-lto.md to contain up to Rust 1.65 #103955

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merged 2 commits into from
Nov 8, 2022
Merged

Update linker-plugin-lto.md to contain up to Rust 1.65 #103955

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ee7c58b
Update linker-plugin-lto.md to contain up to Rust 1.65
str4d Nov 4, 2022
ee7a802
Migrate linker-plugin-lto.md compatibility table to show Rust ranges
str4d Nov 7, 2022
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94 changes: 49 additions & 45 deletions src/doc/rustc/src/linker-plugin-lto.md
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Original file line number Diff line number Diff line change
Expand Up @@ -131,24 +131,47 @@ able to get around this problem by setting `-Clinker=lld-link` in RUSTFLAGS

## Toolchain Compatibility

<!-- NOTE: to update the below table, you can use this shell script:

```sh
rustup toolchain install --profile minimal nightly
MINOR_VERSION=$(rustc +nightly --version | cut -d . -f 2)
LOWER_BOUND=61

llvm_version() {
toolchain="$1"
printf "Rust $toolchain | Clang "
rustc +"$toolchain" -Vv | grep LLVM | cut -d ':' -f 2 | tr -d ' '
}

for version in `seq $LOWER_BOUND $((MINOR_VERSION - 2))`; do
toolchain=1.$version.0
rustup toolchain install --no-self-update --profile minimal $toolchain >/dev/null 2>&1
llvm_version $toolchain
done
<!-- NOTE: to update the below table, you can use this Python script:

```python
from collections import defaultdict
import subprocess

def minor_version(version):
return int(version.split('.')[1])

INSTALL_TOOLCHAIN = ["rustup", "toolchain", "install", "--profile", "minimal"]
subprocess.run(INSTALL_TOOLCHAIN + ["nightly"])

LOWER_BOUND = 65
NIGHTLY_VERSION = minor_version(subprocess.run(
["rustc", "+nightly", "--version"],
capture_output=True,
text=True).stdout)

def llvm_version(toolchain):
version_text = subprocess.run(
["rustc", "+{}".format(toolchain), "-Vv"],
capture_output=True,
text=True).stdout
return int(version_text.split("LLVM")[1].split(':')[1].split('.')[0])

version_map = defaultdict(lambda: [])
for version in range(LOWER_BOUND, NIGHTLY_VERSION - 1):
toolchain = "1.{}.0".format(version)
subprocess.run(
INSTALL_TOOLCHAIN + ["--no-self-update", toolchain],
capture_output=True)
version_map[llvm_version(toolchain)].append(version)

print("| Rust Version | Clang Version |")
print("|--------------|---------------|")
for clang, rust in sorted(version_map.items()):
if len(rust) > 1:
rust_range = "1.{} - 1.{}".format(rust[0], rust[-1])
else:
rust_range = "1.{} ".format(rust[0])
print("| {} | {} |".format(rust_range, clang))
```

-->
Expand All @@ -166,32 +189,13 @@ The following table shows known good combinations of toolchain versions.

| Rust Version | Clang Version |
|--------------|---------------|
| Rust 1.34 | Clang 8 |
| Rust 1.35 | Clang 8 |
| Rust 1.36 | Clang 8 |
| Rust 1.37 | Clang 8 |
| Rust 1.38 | Clang 9 |
| Rust 1.39 | Clang 9 |
| Rust 1.40 | Clang 9 |
| Rust 1.41 | Clang 9 |
| Rust 1.42 | Clang 9 |
| Rust 1.43 | Clang 9 |
| Rust 1.44 | Clang 9 |
| Rust 1.45 | Clang 10 |
| Rust 1.46 | Clang 10 |
| Rust 1.47 | Clang 11 |
| Rust 1.48 | Clang 11 |
| Rust 1.49 | Clang 11 |
| Rust 1.50 | Clang 11 |
| Rust 1.51 | Clang 11 |
| Rust 1.52 | Clang 12 |
| Rust 1.53 | Clang 12 |
| Rust 1.54 | Clang 12 |
| Rust 1.55 | Clang 12 |
| Rust 1.56 | Clang 13 |
| Rust 1.57 | Clang 13 |
| Rust 1.58 | Clang 13 |
| Rust 1.59 | Clang 13 |
| Rust 1.60 | Clang 14 |
| 1.34 - 1.37 | 8 |
| 1.38 - 1.44 | 9 |
| 1.45 - 1.46 | 10 |
| 1.47 - 1.51 | 11 |
| 1.52 - 1.55 | 12 |
| 1.56 - 1.59 | 13 |
| 1.60 - 1.64 | 14 |
| 1.65 | 15 |

Note that the compatibility policy for this feature might change in the future.