[CMake] Refactor add_llvm_implicit_projects to be reusable

This adds llvm_add_implicit_projects which takes a project name and is wrapped by add_llvm_implicit_projects.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@262948 91177308-0d34-0410-b5e6-96231b3b80d8

cmake/modules/AddLLVM.cmake

@@ -850,22 +850,26 @@ function(create_llvm_tool_options)
   create_subdirectory_options(LLVM TOOL)
 endfunction(create_llvm_tool_options)
 
-function(add_llvm_implicit_projects)
+function(llvm_add_implicit_projects project)
   set(list_of_implicit_subdirs "")
   file(GLOB sub-dirs "${CMAKE_CURRENT_SOURCE_DIR}/*")
   foreach(dir ${sub-dirs})
     if(IS_DIRECTORY "${dir}" AND EXISTS "${dir}/CMakeLists.txt")
       canonicalize_tool_name(${dir} name)
-      if (LLVM_TOOL_${name}_BUILD)
+      if (${project}_TOOL_${name}_BUILD)
         get_filename_component(fn "${dir}" NAME)
         list(APPEND list_of_implicit_subdirs "${fn}")
       endif()
     endif()
   endforeach()
 
   foreach(external_proj ${list_of_implicit_subdirs})
-    add_llvm_external_project("${external_proj}")
+    add_llvm_subdirectory(${project} TOOL "${external_proj}" ${ARGN})
   endforeach()
+endfunction(llvm_add_implicit_projects)
+
+function(add_llvm_implicit_projects)
+  llvm_add_implicit_projects(LLVM)
 endfunction(add_llvm_implicit_projects)
 
 # Generic support for adding a unittest.