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# C/C++
All the parts needed to support wasm are included in upstream clang, lld, and
compiler-rt, as of the LLVM 8.0 release. However, to use it, you'll need
to build WebAssembly-targeted versions of the library parts, and it can
be tricky to get all the CMake invocations lined up properly.
To make things easier, we provide
[prebuilt packages](https://github.com/WebAssembly/wasi-sdk/releases)
that provide builds of Clang and sysroot libraries.
WASI doesn't yet support `setjmp`/`longjmp` or C++ exceptions, as it is
waiting for [unwinding support in WebAssembly].
[unwinding support in WebAssembly]: https://github.com/WebAssembly/exception-handling/