Sutou Kouhei created ARROW-6588:
-----------------------------------
Summary: [C++] Suppress class-memaccess warning with g++ 9.2.1
Key: ARROW-6588
URL: https://issues.apache.org/jira/browse/ARROW-6588
Project: Apache Arrow
Issue Type: Improvement
Components: C++
Reporter: Sutou Kouhei
Assignee: Sutou Kouhei
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[1/8] Building CXX object
src/parquet/CMakeFiles/parquet_objlib.dir/encoding.cc.o
FAILED: src/parquet/CMakeFiles/parquet_objlib.dir/encoding.cc.o
/usr/bin/c++ -DARROW_EXTRA_ERROR_CONTEXT -DARROW_JEMALLOC
-DARROW_JEMALLOC_INCLUDE_DIR="" -DARROW_USE_GLOG -DARROW_USE_SIMD
-DARROW_WITH_ZSTD -DHAVE_INTTYPES_H -DHAVE_NETDB_H -DHAVE_NETINET_IN_H
-DPARQUET_EXPORTING -Isrc -I../src -isystem jemalloc_ep-prefix/src -isystem
flatbuffers_ep-prefix/src/flatbuffers_ep-install/include -isystem
../thirdparty/cares_ep-install/include -isystem ../thirdparty/hadoop/include
-isystem orc_ep-install/include -Wno-noexcept-type -fdiagnostics-color=always
-ggdb -O0 -Wall -Wno-conversion -Wno-sign-conversion -Wno-unused-variable
-Werror -msse4.2 -g -fPIC -std=gnu++11 -MD -MT
src/parquet/CMakeFiles/parquet_objlib.dir/encoding.cc.o -MF
src/parquet/CMakeFiles/parquet_objlib.dir/encoding.cc.o.d -o
src/parquet/CMakeFiles/parquet_objlib.dir/encoding.cc.o -c
../src/parquet/encoding.cc
In file included from ../src/parquet/encoding.cc:33:
../src/arrow/util/rle_encoding.h: In instantiation of 'int
arrow::util::RleDecoder::GetBatchWithDictSpaced(const T*, T*, int, int, const
uint8_t*, int64_t) [with T = parquet::FixedLenByteArray; uint8_t = unsigned
char; int64_t = long int]':
../src/parquet/encoding.cc:1079:20: required from 'int
parquet::DictDecoderImpl<Type>::DecodeSpaced(parquet::DictDecoderImpl<Type>::T*,
int, int, const uint8_t*, int64_t) [with Type =
parquet::PhysicalType<parquet::Type::FIXED_LEN_BYTE_ARRAY>;
parquet::DictDecoderImpl<Type>::T = parquet::FixedLenByteArray; uint8_t =
unsigned char; int64_t = long int]'
../src/parquet/encoding.cc:1076:7: required from here
../src/arrow/util/rle_encoding.h:440:9: error: 'void* memset(void*, int,
size_t)' clearing an object of non-trivial type 'struct
parquet::FixedLenByteArray'; use assignment or value-initialization instead
[-Werror=class-memaccess]
440 | memset(&zero, 0, sizeof(T));
| ~~~~~~^~~~~~~~~~~~~~~~~~~~~
In file included from ../src/parquet/encoding.h:27,
from ../src/parquet/encoding.cc:18:
../src/parquet/types.h:515:8: note: 'struct parquet::FixedLenByteArray'
declared here
515 | struct FixedLenByteArray {
| ^~~~~~~~~~~~~~~~~
In file included from ../src/parquet/encoding.cc:33:
../src/arrow/util/rle_encoding.h: In instantiation of 'int
arrow::util::RleDecoder::GetBatchWithDictSpaced(const T*, T*, int, int, const
uint8_t*, int64_t) [with T = parquet::ByteArray; uint8_t = unsigned char;
int64_t = long int]':
../src/parquet/encoding.cc:1079:20: required from 'int
parquet::DictDecoderImpl<Type>::DecodeSpaced(parquet::DictDecoderImpl<Type>::T*,
int, int, const uint8_t*, int64_t) [with Type =
parquet::PhysicalType<parquet::Type::BYTE_ARRAY>;
parquet::DictDecoderImpl<Type>::T = parquet::ByteArray; uint8_t = unsigned
char; int64_t = long int]'
../src/parquet/encoding.cc:1076:7: required from here
../src/arrow/util/rle_encoding.h:440:9: error: 'void* memset(void*, int,
size_t)' clearing an object of non-trivial type 'struct parquet::ByteArray';
use assignment or value-initialization instead [-Werror=class-memaccess]
440 | memset(&zero, 0, sizeof(T));
| ~~~~~~^~~~~~~~~~~~~~~~~~~~~
In file included from ../src/parquet/encoding.h:27,
from ../src/parquet/encoding.cc:18:
../src/parquet/types.h:495:8: note: 'struct parquet::ByteArray' declared here
495 | struct ByteArray {
| ^~~~~~~~~
cc1plus: all warnings being treated as errors
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