Error during build: DROPBEAR_SVR_PASSWORD_AUTH requires `crypt()'.

[Maimun Ahmed]

When I try to run ./kodev release kindlepw2, I get this error:

/home/maimun/KOReader/koreader-orig/koreader/base/thirdparty/dropbear/build/arm-linux-gnueabi/dropbear-prefix/src/dropbear/sysoptions.h:237:10: error: #error "DROPBEAR_SVR_PASSWORD_AUTH requires `crypt()'."
  237 |         #error "DROPBEAR_SVR_PASSWORD_AUTH requires `crypt()'."
      |          ^~~~~
make[5]: *** [Makefile:128: dbutil.o] Error 1

I am just building the original source code after doing ./kodev fetch-thirdparty and ./kodev build.

Is there anything I need to setup in my computer. Moreover, I get an error message whenever I try to:

gcc -o any_file any_file.c

without adding the flag

-lcrypt

.