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Auto merge of #80818 - 12101111:system-libunwind, r=Mark-Simulacrum

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Don't build in-tree llvm-libunwind if system-llvm-libunwind is enable

When "system-llvm-libunwind" is enabled, some target eg. musl still build in-tree llvm-libunwind which is useless.
This commit is contained in:
bors 2021-01-11 03:24:14 +00:00
commit 00c5c3922f
1 changed files with 4 additions and 0 deletions
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4
library/unwind/build.rs
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@ -4,6 +4,10 @@ fn main() {
println!("cargo:rerun-if-changed=build.rs");
let target = env::var("TARGET").expect("TARGET was not set");
if cfg!(feature = "system-llvm-libunwind") {
return;
}
if cfg!(feature = "llvm-libunwind")
&& ((target.contains("linux") && !target.contains("musl")) || target.contains("fuchsia"))
{