message: cmake: exclude -pthread from Emscripten default build
diff: @@ -177,7 +177,13 @@ if(CV_GCC OR CV_CLANG)
  endif()
  # We need pthread's
  - if(UNIX AND NOT ANDROID AND NOT (APPLE AND CV_CLANG)) # TODO
  + if((UNIX
  + AND NOT ANDROID
  + AND NOT (APPLE AND CV_CLANG)
  + AND NOT EMSCRIPTEN
  + )
  + OR (EMSCRIPTEN AND WITH_PTHREADS_PF) # https://github.com/opencv/opencv/issues/20285
  + )
  add_extra_compiler_option(-pthread)
  endif()
  