+ } else if (streq(option, "include")) {
+ const char *opt;
+ GET_ARG_AFTER(opt, "-include");
+ add_flag(&cppflags_obst, "-include");
+ add_flag(&cppflags_obst, "%s", opt);
+ } else if (streq(option, "isystem")) {
+ const char *opt;
+ GET_ARG_AFTER(opt, "-isystem");
+ add_flag(&cppflags_obst, "-isystem");
+ add_flag(&cppflags_obst, "%s", opt);
+ } else if (streq(option, "nostdinc")
+ || streq(option, "trigraphs")) {
+ /* pass these through to the preprocessor */
+ add_flag(&cppflags_obst, "%s", arg);