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

Due to (exhaustive list of errors):

lightdm.c: In function ‘config_load_sysconfig’:
lightdm.c:70:52: error: passing argument 1 of ‘opensuse_sysconfig_get_string’ from incompatible pointer type [-Wincompatible-pointer-types]
   70 |         str_value = opensuse_sysconfig_get_string (displaymanager_config, "DISPLAYMANAGER_AUTOLOGIN", &error);
      |                                                    ^~~~~~~~~~~~~~~~~~~~~
      |                                                    |
      |                                                    gchar ** {aka char **}
In file included from lightdm.c:25:
opensuse-sysconfig.h:44:57: note: expected ‘const gchar **’ {aka ‘const char **’} but argument is of type ‘gchar **’ {aka ‘char **’}
   44 | gchar     *opensuse_sysconfig_get_string (const gchar **sysconfig, const gchar *key, GError **error);
      |                                           ~~~~~~~~~~~~~~^~~~~~~~~
lightdm.c:86:57: error: passing argument 1 of ‘opensuse_sysconfig_get_boolean’ from incompatible pointer type [-Wincompatible-pointer-types]
   86 |         boolean_value = opensuse_sysconfig_get_boolean (displaymanager_config, "DISPLAYMANAGER_PASSWORD_LESS_LOGIN", &error);
      |                                                         ^~~~~~~~~~~~~~~~~~~~~
      |                                                         |
      |                                                         gchar ** {aka char **}
opensuse-sysconfig.h:46:58: note: expected ‘const gchar **’ {aka ‘const char **’} but argument is of type ‘gchar **’ {aka ‘char **’}
   46 | gboolean   opensuse_sysconfig_get_boolean (const gchar **sysconfig, const gchar *key, GError **error);
      |                                            ~~~~~~~~~~~~~~^~~~~~~~~
lightdm.c:97:57: error: passing argument 1 of ‘opensuse_sysconfig_get_boolean’ from incompatible pointer type [-Wincompatible-pointer-types]
   97 |         boolean_value = opensuse_sysconfig_get_boolean (displaymanager_config, "DISPLAYMANAGER_REMOTE_ACCESS", &error);
      |                                                         ^~~~~~~~~~~~~~~~~~~~~
      |                                                         |
      |                                                         gchar ** {aka char **}
lightdm.c:108:57: error: passing argument 1 of ‘opensuse_sysconfig_get_boolean’ from incompatible pointer type [-Wincompatible-pointer-types]
  108 |         boolean_value = opensuse_sysconfig_get_boolean (displaymanager_config, "DISPLAYMANAGER_XSERVER_TCP_PORT_6000_OPEN", &error);
      |                                                         ^~~~~~~~~~~~~~~~~~~~~
      |                                                         |
      |                                                         gchar ** {aka char **}



See the meta bug#1220571 for more info.