cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations ndbm/datum-dptr.c -o ndbm/datum-dptr -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -lcrypt -latomic
ndbm/datum-dptr.c:7:10: fatal error: ndbm.h: No such file or directory
    7 | #include <ndbm.h>
      |          ^~~~~~~~
compilation terminated.