[Bug c++/80238] genmatch.c:(.text.startup+0x66c6): undefined reference to `operator delete(void*, unsigned long)'

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80238

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
That's the sized-deallocation function which was new in GCC 5.

How did you configure gcc?

What is your existing compiler that you're using to build it?