gcc - ISO C++17 does not allow dynamic exception specifications

Question

Trying to compile a program written in c++17 and depending on gtk and glibmm and I get the following error on compilation:

/usr/include/glibmm-2.4/glibmm/variant.h:498:1: error: ISO C++17 does not allow dynamic exception specifications
  498 | throw(std::bad_cast)

As a workaround, i've tried patching variant.h with the following:

#if __cplusplus >= 201703L
    #define throw(...)
#endif

But i got more and more glib define errors (related to throw).

I wonder if it is possible to do this by passing a compiler flag instead?