during the build process, etags(1) is invoked to generate a TAGS file. This is done to aid the development. Anyway, etags(1) is NOT NEEDED as dependency. So, if you get something like
```
$ make
...
etags gmid.c
make: exec(etags) failed (No such file or directory)
*** Error code 1 (ignored)
```
you don't need to worry, it is OK.
## Notes for specific OSes
### OpenBSD
Everything you need is in base, just run make.
### FreeBSD
You need to install security/libressl and then
```
make CFLAGS=-I/usr/local/include LDFLAGS='-L/usr/local/lib -ltls'