[libcxx] [libcxxabi] [libunwind] [llvm] [libc++] Enable -Wmissing-prototypes (PR #116261)

[Nikolas Klauser via llvm-commits]

================
@@ -125,8 +125,11 @@ _Unwind_VRS_Pop(_Unwind_Context *context, _Unwind_VRS_RegClass regclass,
                 uint32_t discriminator,
                 _Unwind_VRS_DataRepresentation representation);
 
+extern _Unwind_Reason_Code __gnu_unwind_frame(_Unwind_Exception *,
+                                              struct _Unwind_Context *);
+
 #if defined(_LIBUNWIND_UNWIND_LEVEL1_EXTERNAL_LINKAGE)
-#define _LIBUNWIND_EXPORT_UNWIND_LEVEL1 extern
+#define _LIBUNWIND_EXPORT_UNWIND_LEVEL1 extern __inline__
----------------
philnik777 wrote:

I've checked, and technically this isn't an ODR violation. However, AFAICT these are intended to provide the definitions to people who are naughty and declare their own versions of these functions, so I believe this change is correct.

https://github.com/llvm/llvm-project/pull/116261