Change default for KICAD_USE_CMAKE_FINDPROTOBUF

CMakeLists.txt

@@ -165,15 +165,9 @@ cmake_dependent_option( KICAD_APPLE_MAKE_RELOCATEABLE_BUNDLE
     "On macOS, post-process the build to make it relocateable (default ON)"
     ON "APPLE" OFF )
 
-# CMake's FindProtobuf module doesn't work correctly on MacOS or Windows but is
-# required for Linux
-if( UNIX_NOT_APPLE )
-    set( KICAD_CMAKE_PROTOBUF_DEFAULT ON )
-else()
-    set( KICAD_CMAKE_PROTOBUF_DEFAULT OFF )
-endif()
-
-option( KICAD_USE_CMAKE_FINDPROTOBUF "Use FindProtobuf provided by CMake" ${KICAD_CMAKE_PROTOBUF_DEFAULT} )
+# Old versions of CMake and/or protobuf can require the FindProtobuf.cmake,
+# but modern platforms require this to be off
+option( KICAD_USE_CMAKE_FINDPROTOBUF "Use FindProtobuf provided by CMake" OFF )
 mark_as_advanced( KICAD_USE_CMAKE_FINDPROTOBUF )
 
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