[Bug ada/58239] [4.9 regression] pretty-print.c:789: undefined reference to `operator delete(void*)'

[gdr at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58239

--- Comment #2 from Gabriel Dos Reis <gdr at gcc dot gnu.org> ---
OK, I see the emitted reference to 'operator delete', and I suspect I
have an idea of why the compiler generated this reference even though
it isn't used anywhere in the input source code.

Why are we linking gnatlink with xgcc and not with xg++ -nostdc++?