ld { GLIBC_PRIVATE { __nacl_irt_*; } } libc { GLIBC_2.22 { nacl_interface_query; } GLIBC_PRIVATE { # These are used by libpthread. __libc_write; __libc_open; __libc_close; __libc_fork; __exit_thread; __nacl_irt_*; } }