Hi,
Joined on another project that's heavily using Protobuf (Apache Arrow) and
running into strange macro-and-other-symbol visibility issues when I'm
including generated Protobuf headers in more source files (e.g. in
application headers). I'm guessing this may be a more common general
problem but I didn't find anything similar enough to the issues I'm
encountering when searching for similar errors. For example I'm seeing
(truncated as things get less interesting and somewhat repetitive down the
log):
/opt/homebrew/bin/ccache /Library/Developer/CommandLineTools/usr/bin/c++
-DARROW_EXTRA_ERROR_CONTEXT -DARROW_FLIGHT_SQL_EXPORTING -DARROW_HAVE_NEON
-DARROW_WITH_RE2 -DARROW_WITH_TIMING_TESTS -DARROW_WITH_ZLIB
-DGRPC_NAMESPACE_FOR_TLS_CREDENTIALS_OPTIONS=grpc::experimental
-DGRPC_USE_CERTIFICATE_VERIFIER -DGRPC_USE_TLS_CHANNEL_CREDENTIALS_OPTIONS
-DURI_STATIC_BUILD
-I/Users/pauln/bq/git/arrow/cpp/session-managemen-build-debug/src
-I/Users/pauln/bq/git/arrow/cpp/src
-I/Users/pauln/bq/git/arrow/cpp/src/generated -isystem
/opt/homebrew/include -isystem
/Users/pauln/bq/git/arrow/cpp/thirdparty/flatbuffers/include -isystem
/Users/pauln/bq/git/arrow/cpp/thirdparty/hadoop/include -isystem
/opt/homebrew/opt/openssl@1.1/include -isystem
/Users/pauln/bq/git/arrow/cpp/session-managemen-build-debug/jemalloc_ep-prefix/src
-fno-aligned-new -Qunused-arguments -fcolor-diagnostics -Wall -Wextra
-Wdocumentation -Wshorten-64-to-32 -Wno-missing-braces
-Wno-unused-parameter -Wno-constant-logical-operand
-Wno-return-stack-address -Wno-unknown-warning-option -Wno-pass-failed
-march=armv8-a -g -Werror -O0 -ggdb -arch arm64 -isysroot
/Library/Developer/CommandLineTools/SDKs/MacOSX13.1.sdk -fPIC -std=c++17
-MD -MT
src/arrow/flight/sql/CMakeFiles/arrow_flight_sql_objlib.dir/client.cc.o -MF
src/arrow/flight/sql/CMakeFiles/arrow_flight_sql_objlib.dir/client.cc.o.d
-o src/arrow/flight/sql/CMakeFiles/arrow_flight_sql_objlib.dir/client.cc.o
-c /Users/pauln/bq/git/arrow/cpp/src/arrow/flight/sql/client.cc
In file included from
/Users/pauln/bq/git/arrow/cpp/src/arrow/flight/sql/client.cc:22:
In file included from
/Users/pauln/bq/git/arrow/cpp/src/arrow/flight/sql/client.h:24:
/Users/pauln/bq/git/arrow/cpp/session-managemen-build-debug/src/arrow/flight/sql/FlightSql.pb.h:47:3:
error: expected expression
static const uint32_t offsets[];
^
/Users/pauln/bq/git/arrow/cpp/session-managemen-build-debug/src/arrow/flight/sql/FlightSql.pb.h:46:32:
error: variable has incomplete type 'struct ARROW_FLIGHT_SQL_EXPORT'
struct ARROW_FLIGHT_SQL_EXPORT TableStruct_FlightSql_2eproto {
^
/Users/pauln/bq/git/arrow/cpp/session-managemen-build-debug/src/arrow/flight/sql/FlightSql.pb.h:46:8:
note: forward declaration of 'ARROW_FLIGHT_SQL_EXPORT'
struct ARROW_FLIGHT_SQL_EXPORT TableStruct_FlightSql_2eproto {
^
/Users/pauln/bq/git/arrow/cpp/session-managemen-build-debug/src/arrow/flight/sql/FlightSql.pb.h:49:73:
error: no member named 'DescriptorTable' in namespace
'google::protobuf::internal'
ARROW_FLIGHT_SQL_EXPORT extern const
::PROTOBUF_NAMESPACE_ID::internal::DescriptorTable
descriptor_table_FlightSql_2eproto;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
/Users/pauln/bq/git/arrow/cpp/session-managemen-build-debug/src/arrow/flight/sql/FlightSql.pb.h:49:88:
error: expected ';' after top level declarator
ARROW_FLIGHT_SQL_EXPORT extern const
::PROTOBUF_NAMESPACE_ID::internal::DescriptorTable
descriptor_table_FlightSql_2eproto;
[...]
Thanks in advance for any insight!
Cheers
~Paul
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