================
@@ -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");
----------------
honeygoyal wrote:
Thank you for the suggestion, @hubert-reinterpretcast. After careful
consideration, I believe that keeping the -latomic handling directly in AIX.cpp
is the more appropriate approach for the following reasons:
1. Target-Specific Clarity:
The logic for appending -latomic is very specific to the 32-bit AIX
environment. By keeping it in AIX.cpp, we maintain a clear separation between
platform-specific behavior and the more general sanitizer runtime dependency
logic. This makes it immediately obvious to developers reviewing AIX-specific
code that this flag is required solely for this target.
https://github.com/llvm/llvm-project/pull/125388
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