kou commented on PR #44005:
URL: https://github.com/apache/arrow/pull/44005#issuecomment-2357506325

   We don't need to change `cpp/src/arrow/testing/process.cc` because it uses 
`boost::filesystem` only for `boost::process`.
   Could you update the PR description?
   
   We can simplify CMake codes a bit:
   
   ```diff
   diff --git a/cpp/src/arrow/io/CMakeLists.txt 
b/cpp/src/arrow/io/CMakeLists.txt
   index f7afbca558..0398422b05 100644
   --- a/cpp/src/arrow/io/CMakeLists.txt
   +++ b/cpp/src/arrow/io/CMakeLists.txt
   @@ -28,9 +28,7 @@ if(ARROW_HDFS)
                     PREFIX
                     "arrow-io"
                     EXTRA_LINK_LIBS
   -                 arrow::hadoop
   -                 Boost::filesystem
   -                 Boost::system)
   +                 arrow::hadoop)
    endif()
    
    add_arrow_test(memory_test PREFIX "arrow-io")
   ```
   
   If we can remove boost::process dependency, we can remove more codes...


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