gcc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations search/tsearch.c -o search/tsearch -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lxnet -lsocket -latomic
search/tsearch.c:11:1: error: unknown type name ‘posix_tnode’
   11 | posix_tnode *(*foo)(const void *, posix_tnode **, int(*)(const void *, const void *)) = tsearch;
      | ^~~~~~~~~~~
search/tsearch.c:11:35: error: unknown type name ‘posix_tnode’
   11 | posix_tnode *(*foo)(const void *, posix_tnode **, int(*)(const void *, const void *)) = tsearch;
      |                                   ^~~~~~~~~~~