github-actions[bot] commented on code in PR #68595:
URL: https://github.com/apache/doris/pull/68595#discussion_r4135156473
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env.sh:
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@@ -69,7 +69,13 @@ CELLARS=(
wget
pcre
maven
- llvm@20
+ # 22.1.8 is the first compiler-rt whose ASAN runtime survives macOS 26.4+:
+ # dyld reimplemented dyld_shared_cache_iterate_text in Swift there and its
+ # _Block_copy allocation re-enters ASAN init, so every -fsanitize=address
+ # binary built with llvm@20 deadlocks before main()
(llvm/llvm-project#182943,
+ # fixed in 22.1.8; no 20.x or 21.x backport exists). That is the BE's
compiler:
+ # thirdparty/build-thirdparty.sh keeps the third-party libraries on
llvm@20.
+ llvm@22
Review Comment:
[P2] Refresh existing CMake trees when switching to LLVM 22
On a Mac with `be/ut_build_ASAN` already configured under LLVM 20, changing
the compiler selected here does not change that build: `run-be-ut.sh` reuses
the directory by default, and [CMake caches the compiler after first
configuration](https://cmake.org/cmake/help/latest/envvar/CC.html) despite the
new `CC`/`CXX`. The same applies to `build.sh`'s existing BE tree. A developer
pulling this fix and rerunning the default ASAN tests can therefore still link
LLVM 20's runtime and hang before `main()` on macOS 26.4+. Detect and reset a
mismatched compiler cache, or include an explicit `--clean` migration step for
both BE and UT trees.
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