Re: gdb 8.x - g++ 7.x compatibility

On Fri, Feb 2, 2018 at 7:17 PM, Roman Popov <[email protected]> wrote:

> Hello,
> I'm trying to switch from g++ 5.4 to g++ 7.2.
> GDB 8.0.1 however does not understand RTTI generated by g++7.2, so my
> Python scripts for GDB are not working.
>
> Here is a code example:
>
> struct base {  virtual ~base(){}  };
>
> template< int IVAL, unsigned UVAL, unsigned long long ULLVAL>
> struct derived : base {
>     int x = IVAL + + UVAL + ULLVAL;
> };
>
> int main()
> {
>     base * o = new derived<1,2,3>{};
>     return 0;
> }
>
> When compiled with g++5.4 I can read value of x in debugger.
> When compiled with g++7.2   gdb reports:
> warning: RTTI symbol not found for class 'derived<1, 2u, 3ull>'
>
> Problem here is that type name saved in debug information is
> *derived<1, 2, 3>*, not *derived<1, 2u, 3ull>*
>
> Do you plan to fix this anytime soon?
>
> Thanks,
> Roman
>
​try  gdb 8.1 and gcc 7.3 and iterate.
see if fixed, repost.​