https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82787
--- Comment #3 from Ev Drikos <drikosev at gmail dot com> --- Created attachment 42512 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42512&action=edit On Darwin 10.13: "cpp7 /usr/include/syslog.h>cpp7syslog.h" If this isn't what you expect, please feel free to tell me how I should run the preprocessor. Ev. Drikos