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

[Nico Weber via libcxx-commits]

nico wrote:

This breaks our android bots:

```
[9971/107145] CXX android_clang_arm/obj/buildtools/third_party/libc++abi/libc++abi/cxa_personality.o
../../third_party/llvm-build/Release+Asserts/bin/clang++ -MMD -MF android_clang_arm/obj/buildtools/third_party/libc++abi/libc++abi/cxa_persona...(too long)
../../third_party/libc++abi/src/src/cxa_personality.cpp:1135:11: error: use of undeclared identifier '__gnu_unwind_frame'
 1135 |   switch (__gnu_unwind_frame(unwind_exception, context)) {
      |           ^~~~~~~~~~~~~~~~~~
1 error generated.
```

(e.g. https://ci.chromium.org/ui/p/chromium/builders/try/android-arm64-rel/1242196/overview)

Please take a look and revert for now if it takes a while to fix.

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