kou commented on issue #46137:
URL: https://github.com/apache/arrow/issues/46137#issuecomment-2840930687

   https://github.com/apache/arrow/issues/46137#issuecomment-2830733844 showed 
that there is a problem in
   
   ```cmake
   if(ARROW_ORC)
     resolve_dependency(orc HAVE_ALT TRUE)
     if(ORC_VENDORED)
       set(ARROW_ORC_VERSION ${ARROW_ORC_BUILD_VERSION})
     else()
       target_link_libraries(orc::orc INTERFACE ${ARROW_PROTOBUF_LIBPROTOBUF})
       set(ARROW_ORC_VERSION ${orcAlt_VERSION})
       message(STATUS "Found ORC static library: ${ORC_STATIC_LIB}")
       message(STATUS "Found ORC headers: ${ORC_INCLUDE_DIR}")
     endif()
   endif()
   ```
   
   `resolve_dependency(orc)` calls `find_package(orc)` internally: 
https://github.com/apache/arrow/blob/3a018c896a7fbfbfe9db2ee970d063c09905fc62/cpp/cmake_modules/ThirdpartyToolchain.cmake#L291
   
   `find_package(orc)` reads `orcConfig.cmake` or `Findorc.cmake`.
   See also: https://cmake.org/cmake/help/latest/command/find_package.html
   
   I know that Apache ORC uses `orcConfig.cmake`: 
https://github.com/apache/orc/blob/main/c%2B%2B/orcConfig.cmake.in
   
   So I thought that there is a problem in `orcConfig.cmake`.


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