Make drc_proto an optional part of the build

CMakeLists.txt

@@ -148,6 +148,10 @@ cmake_dependent_option( KICAD_USE_BUNDLED_GLEW
     ON "KICAD_USE_EGL"
     OFF )
 
+option( KICAD_DRC_PROTO
+    "Build the DRC prototype QA tool"
+    OFF )
+
 # when option KICAD_SCRIPTING OR KICAD_SCRIPTING_MODULES is enabled:
 # PYTHON_EXECUTABLE can be defined when invoking cmake
 # ( use -DPYTHON_EXECUTABLE=<python path>/python.exe or python2 )

qa/CMakeLists.txt

@@ -54,7 +54,10 @@ add_subdirectory( libs )
 add_subdirectory( pcbnew )
 add_subdirectory( utils/kicad2step )
 # add_subdirectory( libeval_compiler )
-add_subdirectory( drc_proto )
+
+if( KICAD_DRC_PROTO )
+    add_subdirectory( drc_proto )
+endif()
 
 # Utility/debugging/profiling programs
 add_subdirectory( common_tools )