cmake failes with elf.h on 10.6

[treaves@…]

-- Check if the system is big endian - little endian
-- Looking for include files HAVE_STDARG_H
-- Looking for include files HAVE_STDARG_H - found
-- Looking for include files HAVE_WCHAR_H
-- Looking for include files HAVE_WCHAR_H - found
-- Looking for asprintf
-- Looking for asprintf - found
-- Looking for setgroups
-- Looking for setgroups - not found.
running cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_cmake/work/cmake-2.6.4/CMakeFiles/CMakeTmp" && /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_cmake/work/cmake-2.6.4/Bootstrap.cmk/cmake -E copy src2.c src.c  2>&1
-- Performing Test VA_LIST_ISNOT_ARRAY_DEFINE
-- Performing Test VA_LIST_ISNOT_ARRAY_DEFINE - Failed
running cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_cmake/work/cmake-2.6.4/CMakeFiles/CMakeTmp" && /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_cmake/work/cmake-2.6.4/Bootstrap.cmk/cmake -E copy src2.c src.c  2>&1
-- Performing Test HAS_VA_COPY
-- Performing Test HAS_VA_COPY - Success
running cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_cmake/work/cmake-2.6.4/CMakeFiles/CMakeTmp" && /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_cmake/work/cmake-2.6.4/Bootstrap.cmk/cmake -E copy src2.c src.c  2>&1
-- Performing Test ATTR_UNUSED_VAR
-- Performing Test ATTR_UNUSED_VAR - Success
-- Looking for elf.h
-- Looking for elf.h - not found
-- Configuring incomplete, errors occurred!
---------------------------------------------
Error when bootstrapping CMake:
Problem while running initial CMake
---------------------------------------------
Error: Status 1 encountered during processing.
Executing: /opt/local/bin/port install cmake +universal