--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/CMakeLists.txt	Mon May 25 11:07:02 2020 +0900
@@ -0,0 +1,58 @@
+# This file will recurse into all subdirectories that contain CMakeLists.txt
+# Setting variables that match the pattern LLVM_TOOL_{NAME}_BUILD to Off will
+# prevent traversing into a directory.
+#
+# The only tools that need to be explicitly added are ones that have explicit
+# ordering requirements.
+
+# Iterates all the subdirectories to create CMake options to enable/disable
+# traversing each directory.
+create_llvm_tool_options()
+
+# Build polly before the tools: the tools link against polly when
+# LINK_POLLY_INTO_TOOLS is set.
+if(WITH_POLLY)
+  add_llvm_external_project(polly)
+else()
+  set(LLVM_TOOL_POLLY_BUILD Off)
+endif()
+
+if(NOT LLVM_BUILD_LLVM_DYLIB AND NOT LLVM_BUILD_LLVM_C_DYLIB)
+  set(LLVM_TOOL_LLVM_SHLIB_BUILD Off)
+endif()
+
+if(NOT LLVM_USE_INTEL_JITEVENTS )
+  set(LLVM_TOOL_LLVM_JITLISTENER_BUILD Off)
+endif()
+
+if(CYGWIN OR NOT LLVM_ENABLE_PIC)
+  set(LLVM_TOOL_LTO_BUILD Off)
+endif()
+
+# Add LTO, llvm-ar, llvm-config, and llvm-profdata before clang, ExternalProject
+# requires targets specified in DEPENDS to exist before the call to
+# ExternalProject_Add.
+add_llvm_tool_subdirectory(lto)
+add_llvm_tool_subdirectory(gold)
+add_llvm_tool_subdirectory(llvm-ar)
+add_llvm_tool_subdirectory(llvm-config)
+add_llvm_tool_subdirectory(llvm-lto)
+add_llvm_tool_subdirectory(llvm-profdata)
+
+# Projects supported via LLVM_EXTERNAL_*_SOURCE_DIR need to be explicitly
+# specified.
+add_llvm_external_project(clang)
+add_llvm_external_project(llgo)
+add_llvm_external_project(lld)
+add_llvm_external_project(lldb)
+
+# Automatically add remaining sub-directories containing a 'CMakeLists.txt'
+# file as external projects.
+add_llvm_implicit_projects()
+
+# Add subprojects specified using LLVM_EXTERNAL_PROJECTS
+foreach(p ${LLVM_EXTERNAL_PROJECTS})
+  add_llvm_external_project(${p})
+endforeach(p)
+
+set(LLVM_COMMON_DEPENDS ${LLVM_COMMON_DEPENDS} PARENT_SCOPE)