Add a working example for opt.

CMakeLists.txt

@@ -26,5 +26,5 @@ add_subdirectory(third_party/iree)
 add_subdirectory(tools)
 
 # Set include directories
-include_directories(${IREE_SOURCE_DIR}/iree/compiler/src)
+include_directories(${IREE_SOURCE_DIR}/compiler/src)
 

tools/iprc-opt/CMakeLists.txt

+
+add_executable(iprc-opt
+  iprc-opt-main.cc
+)
+
+target_link_libraries(iprc-opt
+  PRIVATE
+    iree::compiler::API2::Headers
+    iree::compiler::API2::Impl
+)
+
+target_include_directories(iprc-opt
+  PRIVATE
+    ${IREE_SOURCE_DIR}/compiler/src
+)

tools/iprc-opt/iprc-opt-main.cc

+// Copyright 2020 The IREE Authors
+//
+// Licensed under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+// Main entry function for iree-opt and derived binaries.
+//
+// Based on mlir-opt but registers the passes and dialects we care about.
+
+#include "iree/compiler/API2/ToolEntryPoints.h"
+
+int main(int argc, char **argv) { return ireeOptRunMain(argc, argv); }