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build: prefer llama.cpp-mainline over sibling llama.cpp #2

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build: prefer llama.cpp-mainline over sibling llama.cpp #2

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build: prefer llama.cpp-mainline over sibling llama.cpp
smanaton Jul 19, 2026
34848ce
docs(build): clarify mainline llama preference without dangling repor…
smanaton Jul 19, 2026
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6 changes: 6 additions & 0 deletions build.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -370,7 +370,13 @@ fn find_llama_cpp_dir() -> PathBuf {
let manifest_dir = PathBuf::from(
env::var_os("CARGO_MANIFEST_DIR").expect("CARGO_MANIFEST_DIR is set by cargo"),
);
// Prefer an explicit mainline checkout over a sibling `llama.cpp` when both
// exist. Some forks lag upstream ggml and have produced non-finite (NaN)
// logits on Q1_0 models; a `llama.cpp-mainline` directory name makes the
// intended tree obvious. WWAMA_LLAMA_CPP_DIR still overrides entirely.
let candidates = [
manifest_dir.join("../../cpp/llama.cpp-mainline"),
manifest_dir.join("../llama.cpp-mainline"),
manifest_dir.join("../../cpp/llama.cpp"),
manifest_dir.join("../llama.cpp"),
];
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