Add EXECUTORCH_LOG_LEVEL option to CMake (#2532)

Summary:
Add a CMake setting (EXECUTORCH_LOG_LEVEL) to set ET_MIN_LOG_LEVEL. Must be one of Debug, Info, Error, or Fatal (case-insensitive).

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Pull Request resolved: #2532

Test Plan: Ran xnn_executor_runner with EXECUTORCH_LOG_LEVEL set to "debug", "Debug", "info", and "bad". Log level and build messages behaved as expected.

Reviewed By: digantdesai

Differential Revision: D55147165

Pulled By: GregoryComer

fbshipit-source-id: 3bab69948dea4c81cc3e7a46054b62cfb8cc6994

Author: GregoryComer

CMakeLists.txt

@@ -77,6 +77,24 @@ if(NOT EXECUTORCH_ENABLE_LOGGING)
   add_definitions(-DET_LOG_ENABLED=0)
 endif()
 
+# Configure log level. Must be one of debug, info, error, fatal.
+set(EXECUTORCH_LOG_LEVEL "Info" CACHE STRING
+      "Build with the given ET_MIN_LOG_LEVEL value")
+string(TOLOWER "${EXECUTORCH_LOG_LEVEL}" LOG_LEVEL_LOWER)
+if(LOG_LEVEL_LOWER STREQUAL "debug")
+  add_definitions(-DET_MIN_LOG_LEVEL=Debug)
+elseif(LOG_LEVEL_LOWER STREQUAL "info")
+  add_definitions(-DET_MIN_LOG_LEVEL=Info)
+elseif(LOG_LEVEL_LOWER STREQUAL "error")
+  add_definitions(-DET_MIN_LOG_LEVEL=Error)
+elseif(LOG_LEVEL_LOWER STREQUAL "fatal")
+  add_definitions(-DET_MIN_LOG_LEVEL=Fatal)
+else()
+  message(SEND_ERROR
+      "Unknown log level \"${EXECUTORCH_LOG_LEVEL}\". Expected one of Debug, " +
+      "Info, Error, or Fatal.")
+endif()
+
 option(EXECUTORCH_ENABLE_PROGRAM_VERIFICATION
        "Build with ET_ENABLE_PROGRAM_VERIFICATION"
        ${_default_release_disabled_options})

build/Utils.cmake

@@ -34,6 +34,8 @@ function(executorch_print_configuration_summary)
   message(STATUS "  FLATC_EXECUTABLE              : ${FLATC_EXECUTABLE}")
   message(
     STATUS "  EXECUTORCH_ENABLE_LOGGING     : ${EXECUTORCH_ENABLE_LOGGING}")
+  message(
+    STATUS "  EXECUTORCH_LOG_LEVEL          : ${EXECUTORCH_LOG_LEVEL}")
   message(STATUS "  EXECUTORCH_ENABLE_PROGRAM_VERIFICATION : "
                  "${EXECUTORCH_ENABLE_PROGRAM_VERIFICATION}")
   message(
@@ -46,6 +48,8 @@ function(executorch_print_configuration_summary)
   )
   message(
     STATUS "  REGISTER_EXAMPLE_CUSTOM_OPS   : ${REGISTER_EXAMPLE_CUSTOM_OPS}")
+  message(STATUS "  EXECUTORCH_BUILD_EXTENSION_AOT_UTIL : "
+                 "${EXECUTORCH_BUILD_EXTENSION_AOT_UTIL}")
   message(STATUS "  EXECUTORCH_BUILD_EXTENSION_DATA_LOADER : "
                  "${EXECUTORCH_BUILD_EXTENSION_DATA_LOADER}")
   message(STATUS "  EXECUTORCH_BUILD_EXTENSION_RUNNER_UTIL : "