undefined symbol: _ZN6google8protobuf2io20ZeroCopyOutputStream15WriteAliasedRawEPKvi

[rameshpasunoori]

What version of protobuf and what language are you using? Version: master/v3.6.0/v3.5.0 etc. v3.3.0 Language: C++/Java/Python/C#/Ruby/PHP/Objective-C/Javascript C++ What operating system (Linux, Windows, ...) and version? Linux RHEL 6.7 What runtime / compiler are you using (e.g., python version or gcc version) gcc version 4.8.2 20140120 (Red Hat 4.8.2-15) (GCC) What did you do? Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Linked against static protobuf libs in my DLL. While loading the DLL i am getting undefined symbols error.

What did you expect to see No Undefined symbols

What did you see instead? undefined symbol: _ZN6google8protobuf2io20ZeroCopyOutputStream15WriteAliasedRawEPKvi

Make sure you include information that can help us debug (full error message, exception listing, stack trace, logs).

Anything else we should know about your project / environment

[BSBandme]

Would you please also include your installation steps and how you link the library to your project?

[rameshpasunoori]

Shifted to static libs from dynamic after that also i am getting below error Include ../../release_v12/lib64/libprotobuf.a undefined symbol: _ZNK6google8protobuf7Message13SpaceUsedLongEv

[rameshpasunoori]

While Linking with DLL getting following errors /usr/bin/ld: /usr/local/lib/libprotobuf.a(zero_copy_stream_impl_lite.o): relocation R_X86_64_32S against symbol _ZTVN6google8protobuf2io18CopyingInputStreamE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(descriptor.o): relocation R_X86_64_32S against symbol _ZTVN6google8protobuf14DescriptorPool14ErrorCollectorE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(descriptor_database.o): relocation R_X86_64_32S against symbol _ZTVN6google8protobuf18DescriptorDatabaseE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(descriptor.pb.o): relocation R_X86_64_32S against symbol _ZNSs4_Rep20_S_empty_rep_storageE@@GLIBCXX_3.4' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(dynamic_message.o): relocation R_X86_64_32S against symbol _ZTVN6google8protobuf14DynamicMessageE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(extension_set_heavy.o): relocation R_X86_64_32S against symbol _ZN6google8protobuf15FieldDescriptor17kTypeToCppTypeMapE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(generated_message_reflection.o): relocation R_X86_64_32S against symbol _ZTVN6google8protobuf8internal26GeneratedMessageReflectionE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(map_field.o): relocation R_X86_64_32 against symbol _ZN6google8protobuf8internal30DeleteMapEntryDefaultInstancesEv' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(message.o): relocation R_X86_64_32S against symbol _ZTVN6google8protobuf10ReflectionE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(reflection_ops.o): relocation R_X86_64_32 against .rodata.str1.1' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(substitute.o): relocation R_X86_64_32 against .rodata.str1.8' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(text_format.o): relocation R_X86_64_32S against symbol _ZTVN6google8protobuf10TextFormat6FinderE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(unknown_field_set.o): relocation R_X86_64_32 against .text' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(wire_format.o): relocation R_X86_64_32S against .rodata' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(strtod.o): relocation R_X86_64_32 against .rodata.str1.1' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(tokenizer.o): relocation R_X86_64_32S against symbol _ZTVN6google8protobuf2io14ErrorCollectorE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(zero_copy_stream_impl.o): relocation R_X86_64_32S against symbol _ZTVN6google8protobuf2io24ConcatenatingInputStreamE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(atomicops_internals_x86_gcc.o): relocation R_X86_64_32 against .rodata.str1.1' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(stringprintf.o): relocation R_X86_64_32S against symbol _ZNSs4_Rep20_S_empty_rep_storageE@@GLIBCXX_3.4' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(structurally_valid.o): relocation R_X86_64_32 against .rodata' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(strutil.o): relocation R_X86_64_32 against .rodata.str1.1' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(extension_set.o): relocation R_X86_64_32S against symbol _ZTVN6google8protobuf8internal15ExtensionFinderE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(any.o): relocation R_X86_64_32 against `.rodata.str1.1' can not be used when making a shared object; recompile with -fPIC

---

Added -fPIC option in both CPPFLAGS and CXXFLAGS in protobuf and rebuilt. but still facing the same error

[cowo78]

You should add set_property(TARGET libprotobuf-lite PROPERTY POSITION_INDEPENDENT_CODE ON) to libprotobuf-lite.cmake and set_property(TARGET libprotobuf PROPERTY POSITION_INDEPENDENT_CODE ON) to libprotobuf.cmake, or at least that worked for me. Did you make sure (make VERBOSE=1) that -fPIC was included into gcc cmdline?

On the other hand, since static linking is explicitly allowed with --compile_static_extension setup.py option I would suggest @acozzette to add -fPIC to static libraries as well.

[Just1045523143]

While Linking with DLL getting following errors /usr/bin/ld: /usr/local/lib/libprotobuf.a(zero_copy_stream_impl_lite.o): relocation R_X86_64_32S against symbol _ZTVN6google8protobuf2io18CopyingInputStreamE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(descriptor.o): relocation R_X86_64_32S against symbol _ZTVN6google8protobuf14DescriptorPool14ErrorCollectorE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(descriptor_database.o): relocation R_X86_64_32S against symbol _ZTVN6google8protobuf18DescriptorDatabaseE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(descriptor.pb.o): relocation R_X86_64_32S against symbol _ZNSs4_Rep20_S_empty_rep_storageE@@GLIBCXX_3.4' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(dynamic_message.o): relocation R_X86_64_32S against symbol _ZTVN6google8protobuf14DynamicMessageE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(extension_set_heavy.o): relocation R_X86_64_32S against symbol _ZN6google8protobuf15FieldDescriptor17kTypeToCppTypeMapE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(generated_message_reflection.o): relocation R_X86_64_32S against symbol _ZTVN6google8protobuf8internal26GeneratedMessageReflectionE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(map_field.o): relocation R_X86_64_32 against symbol _ZN6google8protobuf8internal30DeleteMapEntryDefaultInstancesEv' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(message.o): relocation R_X86_64_32S against symbol _ZTVN6google8protobuf10ReflectionE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(reflection_ops.o): relocation R_X86_64_32 against .rodata.str1.1' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(substitute.o): relocation R_X86_64_32 against .rodata.str1.8' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(text_format.o): relocation R_X86_64_32S against symbol _ZTVN6google8protobuf10TextFormat6FinderE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(unknown_field_set.o): relocation R_X86_64_32 against .text' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(wire_format.o): relocation R_X86_64_32S against .rodata' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(strtod.o): relocation R_X86_64_32 against .rodata.str1.1' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(tokenizer.o): relocation R_X86_64_32S against symbol _ZTVN6google8protobuf2io14ErrorCollectorE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(zero_copy_stream_impl.o): relocation R_X86_64_32S against symbol _ZTVN6google8protobuf2io24ConcatenatingInputStreamE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(atomicops_internals_x86_gcc.o): relocation R_X86_64_32 against .rodata.str1.1' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(stringprintf.o): relocation R_X86_64_32S against symbol _ZNSs4_Rep20_S_empty_rep_storageE@@GLIBCXX_3.4' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(structurally_valid.o): relocation R_X86_64_32 against .rodata' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(strutil.o): relocation R_X86_64_32 against .rodata.str1.1' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(extension_set.o): relocation R_X86_64_32S against symbol _ZTVN6google8protobuf8internal15ExtensionFinderE' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/local/lib/libprotobuf.a(any.o): relocation R_X86_64_32 against `.rodata.str1.1' can not be used when making a shared object; recompile with -fPIC

Added -fPIC option in both CPPFLAGS and CXXFLAGS in protobuf and rebuilt. but still facing the same error

./configure CFLAGS="-fPIC" CXXFLAGS="-fPIC" Using this function can solve my problem.

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