warning_condenser

simple C++ tool for condensing/sorting duplicated warnings in build outputs of gcc,clang,clang-tidy,msvc it help to better see relevant warnings or start reducing them beginning with the most occuring

warning_condenser file_with_warnings [-d]

-d shows also the diagnosis (currently only working with clang 17,gcc 13)

wrote that tool before knowing: -fdiagnostics-format=json (https://stackoverflow.com/questions/36657869/how-do-i-dump-gcc-warnings-into-a-structured-format)

tested with clang 3.4 & 14 & 17 and gcc 4.8.4 & 11 & 13

just grab all the build warnings with

[build command] > file_with_warnings.txt 2>&1 build command can be make, cmake, a direct gcc,g++,clang,clang++ line, etc.

and run

warning_condenser file_with_warnings.txt

example output:

(count:    20) type: -Wunused-function
  (   30) /home/linux/tests/kuzu_dev/kuzu/src/include/common/utils.h:48:13: unused function 'isLittleEndian'
  (   17) /home/linux/tests/kuzu_dev/kuzu/src/include/common/utils.h:36:17: unused function 'nextPowerOfTwo'
  (    3) /home/linux/tests/kuzu_dev/kuzu/src/include/function/cast/functions/numeric_cast.h:103:6: unused function 'tryCastWithOverflowCheck<float, unsigned long>'
  (    3) /home/linux/tests/kuzu_dev/kuzu/src/include/function/cast/functions/numeric_cast.h:66:6: unused function 'tryCastWithOverflowCheck<float, signed char>'
  (    3) /home/linux/tests/kuzu_dev/kuzu/src/include/function/cast/functions/numeric_cast.h:88:6: unused function 'tryCastWithOverflowCheck<float, unsigned char>'
  (    3) /home/linux/tests/kuzu_dev/kuzu/src/include/function/cast/functions/numeric_cast.h:93:6: unused function 'tryCastWithOverflowCheck<float, unsigned short>'
  (    3) /home/linux/tests/kuzu_dev/kuzu/src/include/function/cast/functions/numeric_cast.h:98:6: unused function 'tryCastWithOverflowCheck<float, unsigned int>'
  (    2) /home/linux/tests/kuzu_dev/kuzu/src/include/function/cast/functions/numeric_cast.h:131:6: unused function 'tryCastWithOverflowCheck<double, unsigned char>'
(count:     7) type: -Wpessimizing-move
  (    1) /home/linux/tests/kuzu_dev/kuzu/src/binder/bind/bind_copy.cpp:43:51: moving a temporary object prevents copy elision
  (    1) /home/linux/tests/kuzu_dev/kuzu/src/common/arrow/arrow_converter.cpp:181:12: moving a local object in a return statement prevents copy elision
  (    1) /home/linux/tests/kuzu_dev/kuzu/src/common/arrow/arrow_row_batch.cpp:178:12: moving a local object in a return statement prevents copy elision
  (    1) /home/linux/tests/kuzu_dev/kuzu/src/common/arrow/arrow_row_batch.cpp:547:12: moving a local object in a return statement prevents copy elision
(count:     6) type: -Wunused-variable
  (    1) /home/linux/tests/kuzu_dev/kuzu/src/expression_evaluator/case_evaluator.cpp:104:26: unused variable 'resultEntry'
  (    1) /home/linux/tests/kuzu_dev/kuzu/src/function/cast/cast_fixed_list.cpp:33:18: unused variable 'result'
  (    1) /home/linux/tests/kuzu_dev/kuzu/src/processor/map/map_dummy_scan.cpp:12:10: unused variable 'logicalDummyScan'
  (    1) /home/linux/tests/kuzu_dev/kuzu/src/processor/operator/aggregate/simple_aggregate_scan.cpp:10:16: unused variable 'dataPos'

TODOs:

• include/exclude filter for pathes

• importer for -fdiagnostics-format=json (https://clang.llvm.org/docs/UsersManual.html#formatting-of-diagnostics, https://gcc.gnu.org/onlinedocs/gcc/Diagnostic-Message-Formatting-Options.html#Options-to-Control-Diagnostic-Messages-Formatting)

• parse gcc/clang diagnosis for older versions (starting with Ubuntu 14.04: gcc 4.8.4, clang 3.4)

• parse MSVC diagnosis (test with VS2017,2015,2017,2019,2022)

  Help wanted:

  compile the warning_producer.cpp file from this repo with your compiler version and create an issue with the result file if the condenser doesnt give the warnings etc.