1 files changed, 33 insertions, 0 deletions
diff --git a/pkgs/development/compilers/llvm/12/libunwind/default.nix b/pkgs/development/compilers/llvm/12/libunwind/default.nix
new file mode 100644
index 000000000000..8b75146d7b22
--- /dev/null
+++ b/pkgs/development/compilers/llvm/12/libunwind/default.nix
@@ -0,0 +1,33 @@
+{ lib, stdenv, llvm_meta, version, fetch, libcxx, llvm, cmake
+, enableShared ? !stdenv.hostPlatform.isStatic
+}:
+
+stdenv.mkDerivation rec {
+  pname = "libunwind";
+  inherit version;
+
+  src = fetch pname "1x8wpmsrsgnwj2v5ih52ylni7r6n8gzkcj6hx65zbxski2rablly";
+
+  postUnpack = ''
+    unpackFile ${libcxx.src}
+    mv libcxx-* libcxx
+    unpackFile ${llvm.src}
+    mv llvm-* llvm
+  '';
+
+  nativeBuildInputs = [ cmake ];
+
+  cmakeFlags = lib.optional (!enableShared) "-DLIBUNWIND_ENABLE_SHARED=OFF";
+
+  meta = llvm_meta // {
+    # Details: https://github.com/llvm/llvm-project/blob/main/libunwind/docs/index.rst
+    homepage = "https://clang.llvm.org/docs/Toolchain.html#unwind-library";
+    description = "LLVM's unwinder library";
+    longDescription = ''
+      The unwind library provides a family of _Unwind_* functions implementing
+      the language-neutral stack unwinding portion of the Itanium C++ ABI (Level
+      I). It is a dependency of the C++ ABI library, and sometimes is a
+      dependency of other runtimes.
+    '';
+  };
+}