dev-db/mysql-connector-c++ with protobuf-23.3-r2 fails to build with the following error: ======================================= cd /var/tmp/portage/portage/dev-db/mysql-connector-c++-8.0.32/work/mysql-connector-c++-8.0.32-src_build/cdk/protocol/mysqlx && /usr/bin/c++ -DCONCPP_BUILD_SHARED -I/var/tmp/portage/portage/dev-db/mysql-connector-c++-8.0.32/work/mysql-connector-c++-8.0. 32-src/cdk/include -I/var/tmp/portage/portage/dev-db/mysql-connector-c++-8.0.32/work/mysql-connector-c++-8.0.32-src_build/cdk/ include -I/var/tmp/portage/portage/dev-db/mysql-connector-c++-8.0.32/work/mysql-connector-c++-8.0.32-src_build/cdk/protocol/my sqlx -I/var/tmp/portage/portage/dev-db/mysql-connector-c++-8.0.32/work/mysql-connector-c++-8.0.32-src/cdk/extra/rapidjson/incl ude -Wall -O2 -pipe -march=haswell -mtune=skylake -fdebug-prefix-map=/var/tmp/portage/portage/dev-db/mysql-connector-c++-8.0. 32/work/mysql-connector-c++-8.0.32-src=. -O2 -g -DNDEBUG -std=c++11 -fPIC -fvisibility=hidden -Wall -DRAPIDJSON_HAS_CXX11_NOEX CEPT=1 -DRAPIDJSON_HAS_CXX11_RANGE_FOR=1 -DRAPIDJSON_HAS_CXX11_RVALUE_REFS=1 -w -MD -MT cdk/protocol/mysqlx/CMakeFiles/cdk_pro to_mysqlx.dir/protobuf/mysqlx_notice.pb.cc.o -MF CMakeFiles/cdk_proto_mysqlx.dir/protobuf/mysqlx_notice.pb.cc.o.d -o CMakeFile s/cdk_proto_mysqlx.dir/protobuf/mysqlx_notice.pb.cc.o -c /var/tmp/portage/portage/dev-db/mysql-connector-c++-8.0.32/work/mysql -connector-c++-8.0.32-src_build/cdk/protocol/mysqlx/protobuf/mysqlx_notice.pb.cc In file included from /usr/include/absl/base/config.h:86, from /usr/include/absl/base/attributes.h:37, from /usr/include/absl/strings/string_view.h:39, from /usr/include/google/protobuf/stubs/common.h:44, from /usr/include/google/protobuf/io/zero_copy_stream.h:110, from /var/tmp/portage/portage/dev-db/mysql-connector-c++-8.0.32/work/mysql-connector-c++-8.0.32-src/cdk/proto col/mysqlx/protocol.cc:39: /usr/include/absl/base/policy_checks.h:79:2: ошибка: #error "C++ versions less than C++14 are not supported." 79 | #error "C++ versions less than C++14 are not supported." | ^~~~~ ======================================= Error is clear. How to fix it? Although, starting with 8.0.17 it should be possible (see release notes[1]) to build with C++14 I failed to enable this option. append-cxxflags -std=c++14 is not working since cmake appends c++11 at the end. So I decided to try 8.1.0 that switched to c++17. Nevertherless it fails to build with system protobuf as well. mysql-connector-c++ uses older protobuf, that defines log_handler function and LogLevel. In newer protobuf they were completely removed, so I got the following error compiling mysql-connector-c++-8.1.0: ======================================= cd /var/tmp/portage/portage/dev-db/mysql-connector-c++-8.1.0/work/mysql-connector-c++-8.1.0-src_build/cdk/protocol/mysqlx && /usr/bin/c++ -DCONCPP_BUILD_SHARED -I/var/tmp/portage/portage/dev-db/mysql-connector-c++-8.1.0/work/mysql-connector-c++-8.1.0-src/cdk/include -I/var/tmp/portage/portage/dev-db/mysql-connector-c++-8.1.0/work/mysql-connector-c++-8.1.0-src_build/cdk/include -I/var/tmp/portage/portage/dev-db/mysql-connector-c++-8.1.0/work/mysql-connector-c++-8.1.0-src_build/cdk/protocol/mysqlx -I/var/tmp/portage/portage/dev-db/mysql-connector-c++-8.1.0/work/mysql-connector-c++-8.1.0-src/cdk/extra/rapidjson/include -Wall -O2 -pipe -march=haswell -mtune=skylake -fdebug-prefix-map=/var/tmp/portage/portage/dev-db/mysql-connector-c++-8.1.0/work/mysql-connector-c++-8.1.0-src=. -O2 -g -DNDEBUG -std=c++17 -fPIC -fvisibility=hidden -Wall -DRAPIDJSON_HAS_CXX11_NOEXCEPT=1 -DRAPIDJSON_HAS_CXX11_RANGE_FOR=1 -DRAPIDJSON_HAS_CXX11_RVALUE_REFS=1 -w -MD -MT cdk/protocol/mysqlx/CMakeFiles/cdk_proto_mysqlx.dir/protobuf/mysqlx.pb.cc.o -MF CMakeFiles/cdk_proto_mysqlx.dir/protobuf/mysqlx.pb.cc.o.d -o CMakeFiles/cdk_proto_mysqlx.dir/protobuf/mysqlx.pb.cc.o -c /var/tmp/portage/portage/dev-db/mysql-connector-c++-8.1.0/work/mysql-connector-c++-8.1.0-src_build/cdk/protocol/mysqlx/protobuf/mysqlx.pb.cc /var/tmp/portage/portage/dev-db/mysql-connector-c++-8.1.0/work/mysql-connector-c++-8.1.0-src/cdk/protocol/mysqlx/protocol.cc:120:13: ошибка: переменная или поле «log_handler» объявлено void 120 | static void log_handler(LogLevel level, const char* filename, int line, const std::string& message); | ^~~~~~~~~~~ /var/tmp/portage/portage/dev-db/mysql-connector-c++-8.1.0/work/mysql-connector-c++-8.1.0-src/cdk/protocol/mysqlx/protocol.cc:120:25: ошибка: нет декларации «LogLevel» в этой области видимости 120 | static void log_handler(LogLevel level, const char* filename, int line, const std::string& message); | ^~~~~~~~ ======================================= Now, if I disable system protobuf I've manged to build it sucessfully. So, I think good solution for the problem will be bumping mysql-connector-c (ebuild works without modifications)/mysql-connector-c++ to 8.1.0 and disabling system protobuf. At least until upstream makes library work with newer protobuf. Refs: [1] https://downloads.mysql.com/docs/connector-cpp-relnotes-en.pdf
Created attachment 871516 [details] emerge --info
Created attachment 871517 [details] mysql-connector-c++-8.0.32.ebuild build.log with failure due to protobuf requires c++14
*** This bug has been marked as a duplicate of bug 912944 ***
