Compile zmodem.ino

[Givy]

Hi,

Trying to compile "zmodem" and I get the following erros. A file is attached foro yout ionformatio. Am I missing a package or is there anything else?
Please let me know.

Thanks.

\Zimodem-master\Zimodem-master\zimodem\rt_clock.ino:17: warning: "htonl" redefined
17 | #define htonl(x) ( ((x)<<24 & 0xFF000000UL) |
.
.
Using library ESP8266WiFi at version 1.0 in folder: C:\Users
zmodem errors.txt
Engineer\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.1\libraries\ESP8266WiFi
exit status 1
no return statement in function returning non-void [-Werror=return-type]