Building linux-atm with GCC 14 fails here:
https://build.opensuse.org/package/live_build_log/openSUSE:Factory:Staging:Gcc7/linux-atm/standard/x86_64

Due to (exhaustive list of errors):

  100 |         fprintf(stderr,"internal error: len %d %% %d\n",req.length,
conn.c: In function ‘accept_conn’:
conn.c:414:57: error: passing argument 3 of ‘accept’ from incompatible pointer type [-Wincompatible-pointer-types]
  414 |         fd = accept(conn->fd, (struct sockaddr *)&addr, &len);
      |                                                         ^~~~
      |                                                         |
      |                                                         size_t * {aka long unsigned int *}
In file included from ../../src/include/atm.h:10,
                 from conn.c:42:
/usr/include/sys/socket.h:307:42: note: expected ‘socklen_t * restrict’ {aka ‘unsigned int * restrict’} but argument is of type ‘size_t *’ {aka ‘long unsigned int *’}
  307 |                    socklen_t *__restrict __addr_len);
      |                    ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~

See the meta bug#1220571 for more info.