openssh @6.2p2 fails to configure

[nonstop.server@…]

Upgrading openssh fails during configure phase with error message:

checking for gcc... /usr/bin/gcc-4.0
checking whether the C compiler works... no
configure: error: in `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_net_openssh/openssh/work/openssh-6.2p2':
configure: error: C compiler cannot create executables
See `config.log' for more details
Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_net_openssh/openssh/work/openssh-6.2p2" && ./configure --prefix=/opt/local --with-ssl-dir=/opt/local --sysconfdir=/opt/local/etc/ssh --with-privsep-path=/opt/local/var/empty --with-md5-passwords --with-pid-dir=/opt/local/var/run --with-tcp-wrappers --with-pam --mandir=/opt/local/share/man --with-zlib=/opt/local --with-kerberos5=/opt/local --with-xauth=/opt/local/bin/xauth --with-libedit --with-4in6 --with-audit=bsm --with-keychain=apple --disable-utmp --disable-wtmp --with-privsep-user=_sshd CFLAGS="-fPIE -O2" CPPFLAGS="-F/System/Library/Frameworks/OpenDirectory.framework -F/System/Library/Frameworks/CoreFoundation.framework -D_UTMPX_COMPAT -D__APPLE_LAUNCHD__ -D__APPLE_MEMBERSHIP__ -D__APPLE_XSAN__" LDFLAGS="-Wl,-pie -framework CoreFoundation -framework OpenDirectory" --with-ldns 
Exit code: 77
Error: org.macports.configure for port openssh returned: configure failure: command execution failed

Version Information:

Mac OS Version:
ProductName:	Mac OS X
ProductVersion:	10.5.8
BuildVersion:	9L31a
Darwin 9.8.0 Darwin Kernel Version 9.8.0: Wed Jul 15 16:55:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_I386 i386

Xcode Version:
Xcode 3.1.4
Component versions: DevToolsCore-1204.0; DevToolsSupport-1186.0
BuildVersion: 9M2809

Macports Version:
Version: 2.1.3

[neverpanic (Clemens Lang)]

ld: framework not found OpenDirectory

It seems Leopard doesn't use OpenDirectory. Unless you find out yourself what the correct alternative would be for Leopard (if any), I'm just going to advise you to avoid the +gsskex variant and disable it in the Portfile. I don't have a Leopard box to test on and have no intention of supporting such an old operating system on a port I don't even maintain.

[nonstop.server@…]

Replying to cal@…:

Thank you for the advice and your support it's much appreciated.
I was able to get openssh to configure and compile with the +gsskex variant enabled using the DirectoryService.framework.
I'm not 100% sure this is the correct solution, but so far it seems to be all right.
If I encounter any problems I'll fallback on the installation without the +gsskex variant enabled, like you suggested.
My difference report has been attached for your inspection.

[neverpanic (Clemens Lang)]

If that fixes the build for you, that's great – it also works fine on newer versions of OS X. Committed in r108368.