error: redefinition of ‘template<class auto:8>

[boonflies]

I am trying to compile a working software available over github and built successfully for many users,

here is the code in header file:

auto vx(auto &p) -> decltype((p.vx))
{
  return p.vx;
}

auto vx(auto &p) -> decltype(p.vel, (x(p.vel)))
{
  return x(p.vel);
}

The above code is causing the error:
error: redefinition of ‘template<class auto:8> auto:8 vx(auto:8&)’

How do we resolve this error?

[mbozzi]

How do we resolve this error?

Upgrade your compiler.

[boonflies]

Thanks, the compiler update worked...

Followed the procedure in the link below:
https://tuxamito.com/wiki/index.php/Installing_newer_GCC_versions_in_Ubuntu