Add a comment on why we pass `extra_clang_args` last.
Carried over from abandoned
I feel it may be important to point this out to future maintainers.
@@ -282,6 +282,7 @@ fn do_run_test(
.target(&target)
.opt_level(1)
.flag("-std=c++14");
+ // Pass extra_clang_args last so that we have a chance to override the `-std` flag.
for f in extra_clang_args {
b = b.flag(f);
}
