How to fix 'undefined reference to ... SC_DISABLE_VIRTUAL_BIND_UNDEFINED_'?

[DavidA]

Hi,

I am building a SystemC application on Centos 7 using gcc 7.3.1 (devtoolset-7).

Linkage of my application fails with error:

main.cpp:(.text.startup+0x2e): undefined reference to `sc_core::sc_api_version_2_3_3_cxx201402L<&sc_core::SC_DISABLE_VIRTUAL_BIND_UNDEFINED_>
::sc_api_version_2_3_3_cxx201402L(sc_core::sc_writer_policy)'

I can see that this error has been discussed in other forum topics and is caused by a mismatch of the C++ Standard. Therefore, I have checked that I am building both SystemC and the application using C++14. But I still see the error.

I build SystemC 2.3.3 as follows:

$ cmake -DCMAKE_CXX_STANDARD=14 -DBUILD_SHARED_LIBS=OFF ..

and the link command for the application is:

$ /opt/rh/devtoolset-7/root/usr/bin/g++ -O3 -DNDEBUG -Wl,--export-dynamic -rdynamic CMakeFiles/zodiac.
dir/Kernel/main.cpp.o -o zodiac -Wl,-whole-archive /data/daldrich/systemc-2.3.3/systemc-2.3.3/build/systemc-2.3.3-install/lib64/libsystemc
.a -Wl,--no-whole-archive,--as-needed -Wl,--whole-archive,--export-dynamic Kernel/libKernel.a -Wl,--no-whole-archive -ldl -pthread

Here is the full error message:

CMakeFiles/zodiac.dir/Kernel/main.cpp.o: In function `_GLOBAL__sub_I_sc_main':
main.cpp:(.text.startup+0x2e): undefined reference to `sc_core::sc_api_version_2_3_3_cxx201402L<&sc_core::SC_DISABLE_VIRTUAL_BIND_UNDEFINED_>
::sc_api_version_2_3_3_cxx201402L(sc_core::sc_writer_policy)'
collect2: error: ld returned 1 exit status

What am I doing wrong?

Best regards, David

[AmeyaVS]

Hello @DavidA

I don't see the "-std=c++14" in your application build command line.

Regards,

Ameya Vikram Singh

 

[DavidA]

Sorry, I didn't show the application compile command:

/opt/rh/devtoolset-7/root/usr/bin/g++ -DSYSTEMC -Dzodiac_EXPORTS -I../../Kernel -I/data/daldrich/systemc-2.3.3/systemc-2.3.3/src -O3 -
DNDEBUG -Wall -pedantic -pthread -std=c++14 -MD -MT CMakeFiles/zodiac.dir/Kernel/main.cpp.o -MF CMakeFiles/zodiac.dir/Kernel/main.cpp.o.d -
o CMakeFiles/zodiac.dir/Kernel/main.cpp.o -c ../../Kernel/main.cpp

So I do specify "-std=c++14" there.

And the link command repeated from original post:

/opt/rh/devtoolset-7/root/usr/bin/g++ -O3 -DNDEBUG -Wl,--export-dynamic -rdynamic CMakeFiles/zodiac.dir/Kernel/main.cpp.o -o zo
diac -Wl,-whole-archive,-export-dynamic,-no-as-needed /data/daldrich/systemc-2.3.3/systemc-2.3.3/build/systemc-2.3.3-install/lib64/libsyste
mc.a -Wl,--no-whole-archive,--as-needed -Wl,--whole-archive,--export-dynamic Kernel/libKernel.a -Wl,--no-whole-archive -ldl -pthread

(I am assuming that "-std=c++14" isn't needed in the link command).

[AmeyaVS]

Hello @DavidA

Can you post the output of the following command:

nm -C $SYSTEMC_HOME/lib/libsystemc.so | grep sc_api_version

Regards

Ameya Vikram Singh

[DavidA]

I am using a static library. Here is the output:

$ nm -C /data/daldrich/systemc-2.3.3/systemc-2.3.3/build/systemc-2.3.3-install/lib64/libsystemc.a | grep
sc_api_version
0000000000000690 T sc_core::sc_api_version_2_3_3_cxx201103L<&sc_core::SC_DISABLE_VIRTUAL_BIND_UNDEFINED_>::sc_api_version_2_3_3_cxx201103L(sc
_core::sc_writer_policy)
0000000000000690 T sc_core::sc_api_version_2_3_3_cxx201103L<&sc_core::SC_DISABLE_VIRTUAL_BIND_UNDEFINED_>::sc_api_version_2_3_3_cxx201103L(sc
_core::sc_writer_policy)
0000000000000030 b sc_core::sc_api_version_2_3_3_cxx201103L<&sc_core::SC_DISABLE_VIRTUAL_BIND_UNDEFINED_>::sc_api_version_2_3_3_cxx201103L(sc
_core::sc_writer_policy)::default_writer_policy_config
0000000000000040 b sc_core::sc_api_version_2_3_3_cxx201103L<&sc_core::SC_DISABLE_VIRTUAL_BIND_UNDEFINED_>::sc_api_version_2_3_3_cxx201103L(sc
_core::sc_writer_policy)::default_writer_policy_config_seen

[AmeyaVS]

Hello @DavidA

It seems your SystemC library was built using C++11 standard.

try changing the compile flag for the application to C++11 and see if this errors goes away.

 

Regards,

Ameya Vikram Singh

[DavidA]

Hi @AmeyaVS

Thanks for helping me. I rebuilt my application using C++11 and no error occured. So the question seems to be: why is my SystemC library built using C++11 standard, when I specified:

$ cmake -DCMAKE_CXX_STANDARD=14 -DBUILD_SHARED_LIBS=OFF ..

Best regards

David

[AmeyaVS]

Hello @DavidA

It might be if you are reusing the build directory and cmake has cached the previous configuration.

What Generator backend are you using from cmake?(make/ninja or others)

Regards,

Ameya Vikram Singh

[DavidA]

Hi @AmeyaVS

I've been careful to clean the build directory each time:
    rm -rf *

I'm using 'make' but have ninja available.

[DavidA]

The cached value is 14, but it gets built with 11:
 

$ cmake -L .. | grep CXX
-- CMAKE_CXX_STANDARD = 14
-- CMAKE_CXX_STANDARD_REQUIRED = ON
CMAKE_CXX_STANDARD:STRING=14

[DavidA]

I fixed this by specifying the devtoolset-7 g++ compiler to CMake:
 

$ cmake -DBUILD_SHARED_LIBS=OFF -DCMAKE_CXX_STANDARD=14 -DCMAKE_CXX_COMPILER=/opt/rh/devtoolset-7/root/usr/bin/g++ ..

The problem was caused by CMake using the default Centos 7 g++ compiler (v.4.8.5) which presumably doesn't support C++14.