BUG : C++ versions less than C++14 are not supported

[Chellapandi]

What version of protobuf and what language are you using?
Version:

• Protobuf : 21.12
• protoc : libprotoc 3.17.3
• Bazel : 5.4.0
• bazel depenedency:

http_archive(
    name = "com_google_protobuf",
    sha256 = "2118051b4fb3814d59d258533a4e35452934b1ddb41230261c9543384cbb4dfc",
    strip_prefix = "protobuf-3.22.2",
    urls = ["https://github.com/protocolbuffers/protobuf/archive/v3.22.2.tar.gz"],
 )

Language: Golang

What operating system (Linux, Windows, ...) and version?
MacOS Monterey - 12.6.3

What runtime / compiler are you using (e.g., python version or gcc version)
python - Python 3.8.8

What did you do?
When I do bazel build //..., build should be succeeded.

What did you expect to see
Build Successful.

What did you see instead?

In file included from external/com_google_absl/absl/crc/internal/cpu_detect.cc:15:
In file included from external/com_google_absl/absl/crc/internal/cpu_detect.h:18:
In file included from external/com_google_absl/absl/base/config.h:86:
external/com_google_absl/absl/base/policy_checks.h:79:2: error: "C++ versions less than C++14 are not supported."
#error "C++ versions less than C++14 are not supported."

To resolve this issue, I have added the below snippet in WORKSPACE.

http_archive(
      name = "com_google_absl",
      sha256 = "f88c0030547281e8283ff183db61564ff08d3322a8c2e2de4c40e38c03c69aea",
      strip_prefix = "abseil-cpp-c27ab06897f330267bed99061ed3e523e2606bf1",
      urls = ["https://github.com/abseil/abseil-cpp/archive/c27ab06897f330267bed99061ed3e523e2606bf1.zip"],
)

But I got below error:
/external/com_google_protobuf/src/google/protobuf/compiler/BUILD.bazel:101:11: no such package '@com_google_absl//absl/log': BUILD file not found in directory 'absl/log' of external repository @com_google_absl. Add a BUILD file to a directory to mark it as a package. and referenced by '@com_google_protobuf//src/google/protobuf/compiler:protoc_lib_nowkt'

I tried the below workaround as well.
bazel build --action_env=BAZEL_CXXOPTS="-std=c++20" //...
But no luck.

Anything else we should know about your project / environment
I have to use grpc-gateway library which uses 3.22.2. So it throws below error if I downgrade the version to 3.21.7.

version_service.pb.gw.go:16:2: imported and not used: "github.com/golang/protobuf/ptypes/empty"
version_service.pb.gw.go:36:15: undefined: emptypb
version_service.pb.gw.go:53:15: undefined: emptypb

[sanchayanghosh]

Here, the absl library seems not to support anything lesser than c++14. Maybe, you need to open the issue there.

[mrcece]

cmake page
"By default, CMake will use whatever C++ version is the system default. Since protobuf requires C++14 or newer,"

[awbraunstein]

I was running into this issue and solved it by adding the following to my project's .bazelrc

build --cxxopt=-std=c++14
build --host_cxxopt=-std=c++14

[Chellapandi]

cmake page "By default, CMake will use whatever C++ version is the system default. Since protobuf requires C++14 or newer,"

@mrcece Thanks for the response. Should I include -DCMAKE_CXX_STANDARD=14 in .bazelrc? I have included --repo_env=-DCMAKE_CXX_STANDARD=14, but still getting the below error:

external/com_google_protobuf/src/google/protobuf/BUILD.bazel:117:8: Executing genrule @com_google_protobuf//src/google/protobuf:gen_wkt_cc_sources failed: (Aborted): bash failed: error executing command /bin/bash -c ... (remaining 1 argument skipped)

Use --sandbox_debug to see verbose messages from the sandbox and retain the sandbox build root for debugging
dyld[88000]: missing symbol called
/bin/bash: line 1: 88000 Abort trap: 6           bazel-out/darwin-opt-exec-2B5CBBC6/bin/external/com_google_protobuf/src/google/protobuf/compiler/protoc_nowkt --cpp_out=dllexport_decl=PROTOBUF_EXPORT:bazel-out/darwin-opt-exec-2B5CBBC6/bin/external/com_google_protobuf/src/google/protobuf/wkt --proto_path=$(dirname $(dirname $(dirname external/com_google_protobuf/src/google/protobuf/any.proto))) external/com_google_protobuf/src/google/protobuf/any.proto external/com_google_protobuf/src/google/protobuf/api.proto external/com_google_protobuf/src/google/protobuf/duration.proto external/com_google_protobuf/src/google/protobuf/empty.proto external/com_google_protobuf/src/google/protobuf/field_mask.proto external/com_google_protobuf/src/google/protobuf/source_context.proto external/com_google_protobuf/src/google/protobuf/struct.proto external/com_google_protobuf/src/google/protobuf/timestamp.proto external/com_google_protobuf/src/google/protobuf/type.proto external/com_google_protobuf/src/google/protobuf/wrappers.proto

Am I using it in a right way? Correct me if I am wrong.

[Chellapandi]

I was running into this issue and solved it by adding the following to my project's .bazelrc

build --cxxopt=-std=c++14
build --host_cxxopt=-std=c++14

@awbraunstein I tired both, but no luck :(
Getting below error after including both options.

external/com_google_protobuf/src/google/protobuf/BUILD.bazel:117:8: Executing genrule @com_google_protobuf//src/google/protobuf:gen_wkt_cc_sources failed: (Aborted): bash failed: error executing command /bin/bash -c ... (remaining 1 argument skipped)

Use --sandbox_debug to see verbose messages from the sandbox and retain the sandbox build root for debugging
dyld[88000]: missing symbol called
/bin/bash: line 1: 88000 Abort trap: 6           bazel-out/darwin-opt-exec-2B5CBBC6/bin/external/com_google_protobuf/src/google/protobuf/compiler/protoc_nowkt --cpp_out=dllexport_decl=PROTOBUF_EXPORT:bazel-out/darwin-opt-exec-2B5CBBC6/bin/external/com_google_protobuf/src/google/protobuf/wkt --proto_path=$(dirname $(dirname $(dirname external/com_google_protobuf/src/google/protobuf/any.proto))) external/com_google_protobuf/src/google/protobuf/any.proto external/com_google_protobuf/src/google/protobuf/api.proto external/com_google_protobuf/src/google/protobuf/duration.proto external/com_google_protobuf/src/google/protobuf/empty.proto external/com_google_protobuf/src/google/protobuf/field_mask.proto external/com_google_protobuf/src/google/protobuf/source_context.proto external/com_google_protobuf/src/google/protobuf/struct.proto external/com_google_protobuf/src/google/protobuf/timestamp.proto external/com_google_protobuf/src/google/protobuf/type.proto external/com_google_protobuf/src/google/protobuf/wrappers.proto

[Chellapandi]

Here, the absl library seems not to support anything lesser than c++14. Maybe, you need to open the issue there.

Thank you. Let me try that.

[Chellapandi]

Thanks @Mizux for the patch clue. That issue has been fixed. But still facing below error which I have mentioned in the ticket.

version_service.pb.gw.go:16:2: imported and not used: "github.com/golang/protobuf/ptypes/empty"
version_service.pb.gw.go:36:15: undefined: emptypb
version_service.pb.gw.go:53:15: undefined: emptypb

[deannagarcia]

As stated above, protobuf announced that C++ versions less than C++ 14 will no longer be supported so this is working as intended.

It seems your new issues is with gRPC, I recommend you file a bug there. If you are still having an issue with the protobuf library, please open a new ticket with reproduction instructions just for that bug.