| @@ -3,7 +3,7 @@ |
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//! See the build.rs for libcompiler_builtins crate for details. |
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use std::env; |
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-use std::path::Path; |
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+use std::path::PathBuf; |
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fn main() { |
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println!("cargo:rerun-if-env-changed=LLVM_PROFILER_RT_LIB"); |
| @@ -79,9 +79,13 @@ fn main() { |
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cfg.define("COMPILER_RT_HAS_ATOMICS", Some("1")); |
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} |
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-// Note that this should exist if we're going to run (otherwise we just |
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-// don't build profiler builtins at all). |
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-let root = Path::new("../../src/llvm-project/compiler-rt"); |
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+// Get the LLVM `compiler-rt` directory from bootstrap. |
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+println!("cargo:rerun-if-env-changed=RUST_COMPILER_RT_FOR_PROFILER"); |
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+let root = PathBuf::from(env::var("RUST_COMPILER_RT_FOR_PROFILER").unwrap_or_else(|_ |
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+let path = "../../src/llvm-project/compiler-rt"; |
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+println!("RUST_COMPILER_RT_FOR_PROFILER was not set; falling back to {path:?}"); |
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+ path.to_owned() |
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+})); |
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let src_root = root.join("lib").join("profile"); |
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assert!(src_root.exists(), "profiler runtime source directory not found: {src_root:?}"); |