[libunwind] [libunwind] Remove unnecessary dependencies on fprintf and stdio.h for increased baremetal friendliness (PR #72040)

[Michael Kenzel via cfe-commits]

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@@ -223,6 +221,41 @@
     } while (0)
 #endif
 
+#define _LIBUNWIND_TRACING_COMPACT_UNWIND (0)
+#if !_LIBUNWIND_TRACING_COMPACT_UNWIND
+#define _LIBUNWIND_TRACE_COMPACT_UNWIND0(msg)
+#define _LIBUNWIND_TRACE_COMPACT_UNWIND(msg, ...)
+#else
+#define _LIBUNWIND_TRACE_COMPACT_UNWIND0(msg)                                  \
+  do {                                                                         \
+    fprintf(stderr, msg);                                                      \
+  } while (0)
+#define _LIBUNWIND_TRACE_COMPACT_UNWIND(msg, ...)                              \
+  do {                                                                         \
+    fprintf(stderr, msg, __VA_ARGS__);                                         \
+  } while (0)
+#endif
+
+#define _LIBUNWIND_TRACING_DWARF_EVAL (0)
+#if !_LIBUNWIND_TRACING_DWARF_EVAL
+#define _LIBUNWIND_TRACE_DWARF_EVAL0(msg)
+#define _LIBUNWIND_TRACE_DWARF_EVAL(msg, ...)
+#else
+#define _LIBUNWIND_TRACE_DWARF_EVAL0(msg)                                      \
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michael-kenzel wrote:

same as above 🙂‍↕️

https://github.com/llvm/llvm-project/pull/72040