libstdc++ version must be at least 4.8

[duongtran11]

CARLA version: latest Platform/OS: Ubuntu 20.04 Problem you have experienced: libstdc++ version must be at least 4.8 What you expected to happen: make PythonAPI Other information (documentation you consulted, workarounds you tried): I'm building Carla Simulator from source on Ubuntu 20.04 mchine following the instruction in the docs, when I tried make PythonAPI I got this error

[ls19920505]

I also encountered the same problem, did you solve it?

[duongtran11]

@ls19920505 no I didn't I checked the file cmake/modules/CheckCompilerVersion.cmake and found out that the reason for this libstdc++ version must be at least 4.8 error maybe cause by GLIBCXX release date is sooner than 22.03.2013. But then I checked my gcc version it's 9.3 and release date is some where in 2018 So it doesn't make any sense Please tell me if you find any solution

[MrLerry]

Any update on this? see: https://github.com/carla-simulator/carla/issues/3441

[ThankPan]

I encountered this same problem after the newly updated document about using clang-10 in Ubuntu 20.04. The error message in the CMakeError.log is as follows:

Performing C++ SOURCE FILE Test LLVM_LIBSTDCXX_MIN failed with the following output:

Change Dir: /home/reinht/Desktop/carla/carla/Build/llvm-8.0-build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/ninja cmTC_4c96e && [1/2] Building CXX object CMakeFiles/cmTC_4c96e.dir/src.cxx.o
FAILED: CMakeFiles/cmTC_4c96e.dir/src.cxx.o 
/usr/bin/clang++-10    -DLLVM_LIBSTDCXX_MIN  -std=c++0x -o CMakeFiles/cmTC_4c96e.dir/src.cxx.o -c src.cxx
src.cxx:2:10: fatal error: 'iosfwd' file not found
#include <iosfwd>
         ^~~~~~~~
1 error generated.
ninja: build stopped: subcommand failed.
Source file was:
#include <iosfwd>
#if defined(__GLIBCXX__)
#if __GLIBCXX__ < 20130322
#error Unsupported libstdc++ version
#endif
#endif
int main() { return 0; }

It seems that the outputted "libstdc++ version must be at least 4.8" is caused by failing the test since 'iosfwd' not found. Is there any possible solution to solve the root problem?

[ThankPan]

I encountered this same problem after the newly updated document about using clang-10 in Ubuntu 20.04. The error message in the CMakeError.log is as follows:

Performing C++ SOURCE FILE Test LLVM_LIBSTDCXX_MIN failed with the following output:

Change Dir: /home/reinht/Desktop/carla/carla/Build/llvm-8.0-build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/ninja cmTC_4c96e && [1/2] Building CXX object CMakeFiles/cmTC_4c96e.dir/src.cxx.o
FAILED: CMakeFiles/cmTC_4c96e.dir/src.cxx.o 
/usr/bin/clang++-10    -DLLVM_LIBSTDCXX_MIN  -std=c++0x -o CMakeFiles/cmTC_4c96e.dir/src.cxx.o -c src.cxx
src.cxx:2:10: fatal error: 'iosfwd' file not found
#include <iosfwd>
         ^~~~~~~~
1 error generated.
ninja: build stopped: subcommand failed.
Source file was:
#include <iosfwd>
#if defined(__GLIBCXX__)
#if __GLIBCXX__ < 20130322
#error Unsupported libstdc++ version
#endif
#endif
int main() { return 0; }

It seems that the outputted "libstdc++ version must be at least 4.8" is caused by failing the test since 'iosfwd' not found. Is there any possible solution to solve the root problem?

Simply solved it by sudo apt install g++-n. n is the version of GCC clang is using.

[yuanhaorannnnnn]

@ls19920505 no I didn't I checked the file cmake/modules/CheckCompilerVersion.cmake and found out that the reason for this libstdc++ version must be at least 4.8 error maybe cause by GLIBCXX release date is sooner than 22.03.2013. But then I checked my gcc version it's 9.3 and release date is some where in 2018 So it doesn't make any sense Please tell me if you find any solution

if GLIBCXX < ${GCC_MIN_DATE}

this line of code makes no sense...compare version with date?

[yuanhaorannnnnn]

GCC

g++ and gcc same version, not for clang

[SoonMoom]

redownload usr/lib/x86_64 ... libstdc++.so. then reinstall or cp from other computer , if you remove libstdc++.so. system apt tec. will not work!!!