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!

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Error when bootstrapping CMake: Problem while running initial CMake

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Error: Status 1 encountered during processing. Executing: /opt/local/bin/port install cmake +universal