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CMAKE_CXX_STANDARD in SystemC-2.3.2 build System Enables Nonstandard C++11 Switch


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Hello All,

cmake ../ -DCMAKE_CXX_STANDARD=11 enables gcc specific switch -std=gnu++11 and "not" standard -std=c++11

And this is creating some side effects:

When I try to use clang: 


I see -std=c++11 option is not enabled during compilation:


[  9%] Building CXX object src/CMakeFiles/systemc.dir/sysc/communication/sc_signal_ports.cpp.o
cd /home/sumit/install/systemc-2.3.2/objdir/src && /usr/bin/clang++   -DSC_BUILD -DSC_ENABLE_ASSERTIONS -DSC_ENABLE_EARLY_MAXTIME_CREATION -DSC_ENABLE_SIMULATION_PHASE_CALLBACKS_TRACING -DSC_INCLUDE_FX -I/home/sumit/install/systemc-2.3.2/src  -O3 -DNDEBUG   -Wall -Wextra -Wno-unused-parameter -Wno-unused-variable -pthread -o CMakeFiles/systemc.dir/sysc/communication/sc_signal_ports.cpp.o -c /home/sumit/install/systemc-2.3.2/src/sysc/communication/sc_signal_ports.cpp
[  9%] Building CXX object src/CMakeFiles/systemc.dir/sysc/communication/sc_signal_resolved.cpp.o
cd /home/sumit/install/systemc-2.3.2/objdir/src && /usr/bin/clang++   -DSC_BUILD -DSC_ENABLE_ASSERTIONS -DSC_ENABLE_EARLY_MAXTIME_CREATION -DSC_ENABLE_SIMULATION_PHASE_CALLBACKS_TRACING -DSC_INCLUDE_FX -I/home/sumit/install/systemc-2.3.2/src  -O3 -DNDEBUG   -Wall -Wextra -Wno-unused-parameter -Wno-unused-variable -pthread -o CMakeFiles/systemc.dir/sysc/communication/sc_signal_resolved.cpp.o -c /home/sumit/install/systemc-2.3.2/src/sysc/communication/sc_signal_resolved.cpp
[  9%] Building CXX object src/CMakeFiles/systemc.dir/sysc/communication/sc_signal_resolved_ports.cpp.o
cd /home/sumit/install/systemc-2.3.2/objdir/src && /usr/bin/clang++   -DSC_BUILD -DSC_ENABLE_ASSERTIONS -DSC_ENABLE_EARLY_MAXTIME_CREATION -DSC_ENABLE_SIMULATION_PHASE_CALLBACKS_TRACING -DSC_INCLUDE_FX -I/home/sumit/install/systemc-2.3.2/src  -O3 -DNDEBUG   -Wall -Wextra -Wno-unused-parameter -Wno-unused-variable -pthread -o CMakeFiles/systemc.dir/sysc/communication/sc_signal_resolved_ports.cpp.o -c /home/sumit/install/systemc-2.3.2/src/sysc/communication/sc_signal_resolved_ports.cpp




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Hello @sumit_tuwien,

You can turn off the G++ extensions using the CMake command-line option:

# Enable C++11 compilation flag
# Disable C++ Compiler Extensions

You can find a reference here.

Can you also list the version and platform information of the tools you are using (clang, CMake, etc.)?

Hope it helps.


Ameya Vikram Singh

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