One thing that would INCREDIBLY help people trying to help you is find
where the symbol is used, look up the variable types in the function call,
and create a prototype.  For example, both of these are valid xmalloc
instances:
   char *xmalloc(int size);
   char *xmalloc(int size, unsigned char fillvalue)
Seeing the use in the code you are trying to compile will help avoid wrong
answers.

People already likely gave you the answers, but a little leg work on your
own before posting will help.


On Thu, Dec 28, 2023 at 4:22 PM KenUnix <ken.unix.guy@gmail.com> wrote:

> Hi. I am trying to compile cron for the 3b2-400 and 3b2-700
> and am apparently missing required libraries. The reason is
> on the 3b2-400 after boot up it complains there is corruption
> in the crontab for every user lp, sysadm, root and so on.
>
> # make cron
>         cc -O  cron.c -o cron
> undefined                       first referenced
>  symbol                             in file
> el_add                              cron.o
> el_delete                           cron.o
> el_empty                            cron.o
> el_first                            cron.o
> el_init                             cron.o
> xmalloc                             cron.o
> el_remove                           cron.o
> num                                 cron.o
> days_in_mon                         cron.o
> days_btwn                           cron.o
> ld fatal: Symbol referencing errors. No output written to cron
> *** Error code 13
>
> Stop.
>
> Does anyone have these libraries? Thanks.
> --
> WWL 📚
>
>
>