ap/libc/glibc/glibc-2.22/termios/Versions

libc {
  GLIBC_2.0 {
    # c*
    cfgetispeed; cfgetospeed; cfmakeraw; cfsetispeed; cfsetospeed; cfsetspeed;

    # t*
    tcdrain; tcflow; tcflush; tcgetattr; tcgetpgrp; tcsendbreak; tcsetattr;
    tcsetpgrp;
  }
  GLIBC_2.1 {
    # t*
    tcgetsid;
  }
}