Error building with GCC 11

[kyak]

After upgrade from GCC 10 to GCC 11, gs-netstream doesn't build anymore. I'm building gs-netstream as part of OpenModelica: https://github.com/OpenModelica/OMCompiler-3rdParty/tree/9efc21c2b91218156bdbcb36eb1059e7a3a55a48/graphstream

Here is the error:

make[4]: Entering directory '/storage/build/openmodelica/src/openmodelica/OMCompiler/3rdParty/graphstream/gs-netstream/c++'
mkdir -p obj
g++ -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fexceptions         -Wp,-D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security         -fstack-clash-protection -fcf-protection -fno-stack-protector -fPIC -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fexceptions         -Wp,-D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security         -fstack-clash-protection -fcf-protection -fno-stack-protector -fPIC -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fexceptions         -Wp,-D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security         -fstack-clash-protection -fcf-protection -Wp,-D_GLIBCXX_ASSERTIONS -c src/netstream-storage.cpp -o obj/netstream-storage.o
In file included from src/netstream-storage.cpp:14:
src/netstream-storage.h:44:52: error: ISO C++17 does not allow dynamic exception specifications
   44 |         void checkReadSafe(unsigned int num) const throw(std::invalid_argument);
      |                                                    ^~~~~
src/netstream-storage.h:70:42: error: ISO C++17 does not allow dynamic exception specifications
   70 |         virtual unsigned char readChar() throw(std::invalid_argument);
      |                                          ^~~~~

And a bunch of same errors from other places in netstream-storage.cpp follow.