cmake flag for disabling adopted experiments

Match configure behavior. Use with:
-DENABLE_ADOPTED_EXPERIMENTS=OFF

Change-Id: I5402d5b0ca65cf3013744ca28023118b7508fd2a

CMakeLists.txt

@@ -17,6 +17,7 @@ if (NOT EMSCRIPTEN)
   endif ()
 endif ()
 
+option(ENABLE_ADOPTED_EXPERIMENTS "Enable adopted experiments." ON)
 option(ENABLE_CCACHE "Enable ccache support." OFF)
 option(ENABLE_DISTCC "Enable distcc support." OFF)
 option(ENABLE_DOCS "Enable documentation generation (doxygen required)." ON)

build/cmake/aom_configure.cmake

@@ -47,6 +47,24 @@ foreach (var ${cmake_cache_vars})
   endif ()
 endforeach ()
 
+# Adopted experiments get enabled by default. For debugging, make it possible to
+# to turn them all off with a single option.
+if (NOT ENABLE_ADOPTED_EXPERIMENTS)
+  get_cmake_property(cmake_cache_vars CACHE_VARIABLES)
+  unset(var)
+  foreach (var ${cmake_cache_vars})
+    unset(var_helpstring)
+    get_property(var_helpstring CACHE ${var} PROPERTY HELPSTRING)
+    if ("${var_helpstring}" STREQUAL "AV1 experiment flag.")
+     if ("${var}" STREQUAL "CONFIG_CB4X4")
+       # CB4X4 is required and can not be disabled.
+     else ()
+       set(${var} 0)
+     endif ()
+    endif ()
+  endforeach ()
+endif ()
+
 # Detect target CPU.
 if (NOT AOM_TARGET_CPU)
   if ("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "AMD64" OR