How can I build OpenSSH for Windows Using Visual Studio with zlib enabled?

[futuremotiondev]

I've followed all of the steps here: https://github.com/PowerShell/Win32-OpenSSH/wiki/Building-OpenSSH-for-Windows-(using-LibreSSL-crypto)

And successfully built the Win32-OpenSSH binaries (Win64 and Win32). My file list is as follows after the build:

_manifest
FixHostFilePermissions.ps1
FixUserFilePermissions.ps1
install-sshd.ps1
libcrypto.dll
LICENSE.txt
moduli
NOTICE.txt
openssh-events.man
OpenSSHUtils.psd1
OpenSSHUtils.psm1
scp.exe
sftp-server.exe
sftp.exe
ssh-add.exe
ssh-agent.exe
ssh-keygen.exe
ssh-keyscan.exe
ssh-pkcs11-helper.exe
ssh-shellhost.exe
ssh-sk-helper.exe
ssh.exe
sshd_config_default
sshd-session.exe
sshd.exe
uninstall-sshd.ps1

But I'm not sure how to check if zlib is enabled in this build, or how to enable it.

A couple questions:

1. How do I enable zlib support when I build my windows binaries?
2. How can I test if zlib is working or active?

Can someone show me in which part of the build process I need to specify zlib support? Is there a flag or something?

Thanks so much for any help!

[tgauth]

zlib is compiled statically with Win32-OpenSSH by default - it is managed via a WITH_ZLIB preprocessor definition, defined in /contrib/win32/openssh/config.h.vs

[tgauth]

To test zlib - add the -C flag to the ssh connection command