=> Bootstrap dependency digest>=20010302: found digest-20121220
=> Checksum SHA1 OK for libSM-1.2.1.tar.bz2
=> Checksum RMD160 OK for libSM-1.2.1.tar.bz2
===> Installing dependencies for libSM-1.2.1
==========================================================================
The supported build options for libSM are:

	inet6

You can select which build options to use by setting PKG_DEFAULT_OPTIONS
or the following variable.  Its current value is shown:

	PKG_OPTIONS.libSM (not defined)

==========================================================================
=> Tool dependency libtool-base>=2.2.6bnb3: found libtool-base-2.4.2nb1
=> Tool dependency pkg-config>=0.25: found pkg-config-0.28
=> Build dependency x11-links>=0.72: found x11-links-0.74
=> Build dependency xtrans>=1.0.3: found xtrans-1.2.7
===> Overriding tools for libSM-1.2.1
===> Extracting for libSM-1.2.1
===> Patching for libSM-1.2.1
===> Creating toolchain wrappers for libSM-1.2.1
ERROR: zlib>=1.1.4nb1 is not installed; can't buildlink files.
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/x11/libSM
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/x11/libSM