[clang] [llvm] [LLVM][Clang][Cygwin] Fix building Clang for Cygwin (PR #134494)

Sat Apr 5 15:58:12 PDT 2025

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@@ -847,7 +847,11 @@ void llvm::sys::PrintStackTrace(raw_ostream &OS, int Depth) {
 
     const char *name = strrchr(dlinfo.dli_fname, '/');
     if (!name)
+#ifdef __CYGWIN__
+      OS << format(" %-*s", width, &dlinfo.dli_fname);
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mati865 wrote:

Good point, somehow my brain switched to Rust mode when working on this problem.
Can we even trust Cygwin's `dli_fname` to always be null terminated? Maybe the best solution would be to create std::string and then just call `.c_str()`?

https://github.com/llvm/llvm-project/pull/134494
