cc -pthread   -Wall -Wextra -Werror=implicit-function-declaration search/hsearch.c -o search/hsearch -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt  -lintl -liconv
search/hsearch.c:4:10: fatal error: search.h: No such file or directory
    4 | #include <search.h>
      |          ^~~~~~~~~~
compilation terminated.