Having Issue to Set Up Dropbear in Cygwin with AES-GCM Cipher

Hi everyone,

I am trying to enable aes gcm algorithm on cygwin by setting this flag to 1 in default_options.h
/* Enable "Galois/Counter Mode" for ciphers. This authenticated
* encryption mode is combination of CTR mode and GHASH. Recommended
* for security and forwards compatibility, but slower than CTR on
* CPU w/o dedicated AES/GHASH instructions.
* Compiling in will add ~6kB to binary size on x86-64 */
#define DROPBEAR_ENABLE_GCM_MODE 1

After I re compile then it shows me
dbclient: Available ciphers: chacha20-poly1305@openssh.com,aes128-ctr,aes256-ctr

The AES-GCM isn't there but if I do the same thing in my Linux machine it will show aes-gcm available.

Do I miss any libraries or does dropbear dbclient in cygwin support AES-GCM cipher?

Thanks,
Jiye