GCC C++ headers like cstdlib use `#include_next <stdlib.h>` to wrap libc headers. We're using `-isystem` for libc, which puts those headers too early in the search path. `-idirafter` fixes this so `include_next` works.
GCC C++ headers like cstdlib use `#include_next <stdlib.h>` to wrap libc headers. We're using `-isystem` for libc, which puts those headers too early in the search path. `-idirafter` fixes this so `include_next` works.