1libc {
2  GLIBC_2.4 {
3    ioperm; iopl;
4    inb; inw; inl;
5    outb; outw; outl;
6  }
7  GLIBC_2.11 {
8    fallocate64;
9  }
10  GLIBC_2.24 {
11    recvmsg; sendmsg;
12  }
13  GLIBC_PRIVATE {
14    # A copy of sigaction lives in libpthread, and needs these.
15    __default_sa_restorer; __default_rt_sa_restorer;
16    # nptl/pthread_cond_timedwait.c uses INTERNAL_VSYSCALL(clock_gettime).
17    __vdso_clock_gettime;
18  }
19}
20