undefined reference to `__gxx_personality_sj0`

Question

With gcc 4.6 when trying to execute this code:

   #include 

using namespace std;

#include 

int main()
{
   //Int<> a         


        

Answer 1

The gcc command is just a driver program that runs the right compiler for the source file you give it, (or run the linker if you give it object files). For a C++ source file with a known file extension it will run the C++ compiler (which for GCC is called cc1plus) and compile the code correctly.

But it won't automatically link to the C++ Standard Library (which for GCC is called libstdc++).

To solve the problem you either need to link to that library explicitly by adding -lstdc++ to the options when linking, or alternatively just compile and link with the g++ driver instead, which automatically adds -lstdc++ to the linker options.

So you can use gcc to compile C++ programs, but if you use any features of the standard library or C++ runtime (including exception handling) then you need to link to the C++ runtime with -lstdc++ (or -lsupc++ for just the runtime). Using g++ does that for you automatically.

This is documented in the manual: https://gcc.gnu.org/onlinedocs/gcc/Invoking-G_002b_002b.html