CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_EXPORT_NO_PACKAGE_REGISTRY


In file included from /home/conan/w/cci_PR-3583/.conan/data/protobuf/3.14.0/_/_/build/6905a2c0d81f40fb3433a9d4a9703ea657d96b47/source_subfolder/src/google/protobuf/dynamic_message.cc:80:
/home/conan/w/cci_PR-3583/.conan/data/protobuf/3.14.0/_/_/build/6905a2c0d81f40fb3433a9d4a9703ea657d96b47/source_subfolder/src/google/protobuf/map_field.h:332:37: error: constexpr constructor never produces a constant expression [-Winvalid-constexpr]
  explicit PROTOBUF_MAYBE_CONSTEXPR MapFieldBase(ConstantInitialized)
                                    ^
/home/conan/w/cci_PR-3583/.conan/data/protobuf/3.14.0/_/_/build/6905a2c0d81f40fb3433a9d4a9703ea657d96b47/source_subfolder/src/google/protobuf/map_field.h:335:9: note: non-literal type 'internal::WrappedMutex' cannot be used in a constant expression
        mutex_(GOOGLE_PROTOBUF_LINKER_INITIALIZED),
        ^
1 error generated.
make[2]: *** [source_subfolder/cmake/CMakeFiles/libprotobuf.dir/__/src/google/protobuf/dynamic_message.cc.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [source_subfolder/cmake/CMakeFiles/libprotobuf.dir/all] Error 2
make: *** [all] Error 2
protobuf/3.14.0: WARN: Build folder is dirty, removing it: /home/conan/w/cci_PR-3583/.conan/data/protobuf/3.14.0/_/_/build/6905a2c0d81f40fb3433a9d4a9703ea657d96b47
protobuf/3.14.0: ERROR: Package '6905a2c0d81f40fb3433a9d4a9703ea657d96b47' build failed
protobuf/3.14.0: WARN: Build folder /home/conan/w/cci_PR-3583/.conan/data/protobuf/3.14.0/_/_/build/6905a2c0d81f40fb3433a9d4a9703ea657d96b47
ERROR: protobuf/3.14.0: Error in build() method, line 133
	cmake.build()
	ConanException: Error 2 while executing cmake --build '/home/conan/w/cci_PR-3583/.conan/data/protobuf/3.14.0/_/_/build/6905a2c0d81f40fb3433a9d4a9703ea657d96b47/build_subfolder' '--' '-j3'