cc -pthread   -Wall -Wextra -Werror=implicit-function-declaration ndbm/dbm_open.c -o ndbm/dbm_open -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt  -lintl -liconv
ndbm/dbm_open.c:7:10: fatal error: ndbm.h: No such file or directory
    7 | #include <ndbm.h>
      |          ^~~~~~~~
compilation terminated.