1 files changed, 59 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/compilers/circt/circt-llvm.nix b/nixpkgs/pkgs/development/compilers/circt/circt-llvm.nix
new file mode 100644
index 000000000000..b3005af55fbb
--- /dev/null
+++ b/nixpkgs/pkgs/development/compilers/circt/circt-llvm.nix
@@ -0,0 +1,59 @@
+{ stdenv
+, cmake
+, ninja
+, circt
+, llvm
+, python3
+}: stdenv.mkDerivation {
+  pname = circt.pname + "-llvm";
+  inherit (circt) version src;
+
+  requiredSystemFeatures = [ "big-parallel" ];
+
+  nativeBuildInputs = [ cmake ninja python3 ];
+
+  preConfigure = ''
+    cd llvm/llvm
+  '';
+
+  cmakeFlags = [
+    "-DBUILD_SHARED_LIBS=ON"
+    "-DLLVM_ENABLE_BINDINGS=OFF"
+    "-DLLVM_ENABLE_OCAMLDOC=OFF"
+    "-DLLVM_BUILD_EXAMPLES=OFF"
+    "-DLLVM_OPTIMIZED_TABLEGEN=ON"
+    "-DLLVM_ENABLE_PROJECTS=mlir"
+    "-DLLVM_TARGETS_TO_BUILD="
+
+    # This option is needed to install llvm-config
+    "-DLLVM_INSTALL_UTILS=ON"
+  ];
+
+  outputs = [ "out" "lib" "dev" ];
+
+  postInstall = ''
+    # move llvm-config to $dev to resolve a circular dependency
+    moveToOutput "bin/llvm-config*" "$dev"
+
+    # move all lib files to $lib except lib/cmake
+    moveToOutput "lib" "$lib"
+    moveToOutput "lib/cmake" "$dev"
+
+    # patch configuration files so each path points to the new $lib or $dev paths
+    substituteInPlace "$dev/lib/cmake/llvm/LLVMConfig.cmake" \
+      --replace 'set(LLVM_BINARY_DIR "''${LLVM_INSTALL_PREFIX}")' 'set(LLVM_BINARY_DIR "'"$lib"'")'
+    substituteInPlace \
+      "$dev/lib/cmake/llvm/LLVMExports-release.cmake" \
+      "$dev/lib/cmake/mlir/MLIRTargets-release.cmake" \
+      --replace "\''${_IMPORT_PREFIX}/lib/lib" "$lib/lib/lib" \
+      --replace "\''${_IMPORT_PREFIX}/lib/objects-Release" "$lib/lib/objects-Release" \
+      --replace "$out/bin/llvm-config" "$dev/bin/llvm-config" # patch path for llvm-config
+  '';
+
+  doCheck = true;
+  checkTarget = "check-mlir";
+
+  meta = llvm.meta // {
+    inherit (circt.meta) maintainers;
+  };
+}