jonkeane opened a new issue, #49371: URL: https://github.com/apache/arrow/issues/49371
### Describe the bug, including details regarding any error messages, version, and platform. #49298 introduced the failure on our CRAN-like Crossbow job: https://github.com/ursacomputing/crossbow/actions/runs/22267571643/job/64416504261#step:9:982 ``` [ 4%] Building C object _deps/lz4-build/CMakeFiles/lz4_static.dir/__/lz4-src/lib/lz4frame.c.o In file included from /Users/runner/work/crossbow/crossbow/arrow/cpp/src/arrow/array/array_base.cc:18: In file included from /Users/runner/work/crossbow/crossbow/arrow/cpp/src/arrow/array/array_base.h:26: In file included from /Users/runner/work/crossbow/crossbow/arrow/cpp/src/arrow/array/data.h:32: /Users/runner/work/crossbow/crossbow/arrow/cpp/src/arrow/util/bit_util.h:141:15: error: no member named 'bit_width' in namespace 'std' 141 | return std::bit_width(x - 1); | ~~~~~^ [ 4%] Building C object _deps/lz4-build/CMakeFiles/lz4_static.dir/__/lz4-src/lib/lz4hc.c.o 1 error generated. make[2]: *** [src/arrow/CMakeFiles/arrow_array.dir/array/array_base.cc.o] Error 1 make[1]: *** [src/arrow/CMakeFiles/arrow_array.dir/all] Error 2 make[1]: *** Waiting for unfinished jobs.... [ 4%] Building C object _deps/lz4-build/CMakeFiles/lz4_static.dir/__/lz4-src/lib/xxhash.c.o [ 4%] Linking C static library liblz4.a [ 4%] Built target lz4_static make: *** [all] Error 2 **** Complete build log may still be present at ``` We'll need to walk this back or work around it until CRAN fully supports C++20. cc @Anakin100100 @pitrou ### Component(s) C++ -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
