CMake: Rename option to enable the Clang tool based header generator

`SAPI_ENABLE_GENERATOR` => `SAPI_ENABLE_CLANG_TOOL`

This prepares further changes in this area.

PiperOrigin-RevId: 531201213
Change-Id: I56bd450e6ed2dd1dbbf45db2825a75c56d277037

cmake/SapiBuildDefs.cmake

@@ -152,7 +152,7 @@ function(add_sapi_library)
     "--sapi_functions=${_sapi_funcs}"
     "--sapi_ns=${_sapi_NAMESPACE}"
   )
-  if(SAPI_ENABLE_GENERATOR)
+  if(SAPI_ENABLE_CLANG_TOOL)
     list(APPEND _sapi_generator_command
       sapi_generator_tool
       -p "${CMAKE_CURRENT_BINARY_DIR}"

cmake/SapiDeps.cmake

@@ -95,7 +95,7 @@ endif()
 
 find_package(Threads REQUIRED)
 
-if(NOT SAPI_ENABLE_GENERATOR)
+if(NOT SAPI_ENABLE_CLANG_TOOL)
   # Find Python 3 and add its location to the cache so that its available in
   # the add_sapi_library() macro in embedding projects.
   find_package(Python3 COMPONENTS Interpreter REQUIRED)

cmake/SapiOptions.cmake

@@ -51,8 +51,8 @@ option(SAPI_BUILD_TESTING
 # Disabled by default, as this will download a lot of extra content.
 option(SAPI_CONTRIB_BUILD_TESTING "Build tests for sandboxes in 'contrib'" OFF)
 
-option(SAPI_ENABLE_GENERATOR
-  "Build Clang based code generator from source" OFF
+option(SAPI_ENABLE_CLANG_TOOL
+  "Use the new Clang tool based header generator" OFF
 )
 
 # This flag should be only enabled for embedded and resource-constrained

sandboxed_api/CMakeLists.txt

@@ -15,7 +15,7 @@
 add_subdirectory(tools/filewrapper)
 add_subdirectory(sandbox2)
 add_subdirectory(util)
-if(SAPI_ENABLE_GENERATOR)
+if(SAPI_ENABLE_CLANG_TOOL)
   add_subdirectory(tools/clang_generator)
 endif()
 add_subdirectory(examples)