libc {
  GLIBC_2.19 {
    __longjmp_chk;
    getcontext;
  }
  GLIBC_PRIVATE {
    __vdso_clock_gettime;
    __vdso_clock_getres;
  }
}

libpthread {
  GLIBC_2.19 {
    __libpthread_version_placeholder;
  }
}