================
@@ -338,6 +338,13 @@ void aix::Linker::ConstructJob(Compilation &C, const
JobAction &JA,
CmdArgs.push_back("-lpthread");
}
const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
+
+// Required for 64-bit atomic operations used in sanitizer runtimes
+// (e.g., sanitizer_common's atomic utilities). On 32-bit AIX, these
+// are not natively supported, necessitating linkage with -latomic.
+ if (Sanitize.hasAnySanitizer() && IsArch32Bit) {
+ CmdArgs.push_back("-latomic");
----------------
hubert-reinterpretcast wrote:
re: https://github.com/llvm/llvm-project/pull/125388/files#r1945365070:
> By keeping it in AIX.cpp, we maintain a clear separation between
> platform-specific behavior and the more general sanitizer runtime dependency
> logic.
In this case, the actual result would have been unintentional platform-specific
behaviour.
https://github.com/llvm/llvm-project/pull/125388
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