https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63750
--- Comment #2 from howarth at bromo dot med.uc.edu --- Created attachment 33897 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33897&action=edit patch to pass fix by appending #include <sstream> to gcc/ipa-chkp.c
