Error on build, please help. configure: error: Could not find a working Foundation implementation

[cquiter@…]

Craigs-MacBook-Pro:MacPorts-2.0.4 cquiter$ ./configure checking build system type... x86_64-apple-darwin11.3.0 checking host system type... x86_64-apple-darwin11.3.0 checking target system type... x86_64-apple-darwin11.3.0 checking MacPorts version... 2.0.4 checking for sw_vers... /usr/bin/sw_vers checking for defaults... /usr/bin/defaults checking for xcode-select... /usr/bin/xcode-select checking Mac OS X version... 10.7.3 checking Xcode location... / checking Xcode version... 4.3.2 checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking for gcc... gcc checking whether we are using the GNU Objective C compiler... yes checking whether gcc accepts -g... yes checking for a BSD-compatible install... /usr/bin/install -c checking whether make sets $(MAKE)... yes checking whether ln -s works... yes checking for mtree... /usr/sbin/mtree checking for chown... /usr/sbin/chown checking for cp... /bin/cp checking for cpio... /usr/bin/cpio checking for diff... /usr/bin/diff checking for dscl... /usr/bin/dscl checking for dseditgroup... /usr/sbin/dseditgroup checking for file... /usr/bin/file checking for bzr... no checking for cvs... /usr/bin/cvs checking for svn... /usr/bin/svn checking for git... /usr/bin/git checking for hg... no checking for gzip... /usr/bin/gzip checking for lipo... /usr/bin/lipo checking for patch... /usr/bin/patch checking for rmdir... /bin/rmdir checking for rsync... /usr/bin/rsync checking for openssl... /usr/bin/openssl checking for sed... /usr/bin/sed checking for tar... /usr/bin/tar checking for unzip... /usr/bin/unzip checking for zip... /usr/bin/zip checking for bsdmake... /usr/bin/bsdmake checking for make... /usr/bin/make checking for hdiutil... /usr/bin/hdiutil checking for launchd... yes checking for launchctl... /bin/launchctl checking for xcodebuild... /usr/bin/xcodebuild checking for gnutar... /usr/bin/gnutar checking for gnumake... /usr/bin/gnumake checking for gnupatch... no checking for gpatch... no checking for bzip2... /usr/bin/bzip2 checking for lzma... no checking for xz... no checking for lsbom... /usr/bin/lsbom checking for mkbom... /usr/bin/mkbom checking for pax... /bin/pax checking for xar... /usr/bin/xar checking for open... /usr/bin/open checking for sed... (cached) /usr/bin/sed checking which sed flag to use for extended regexp... -E (BSD) checking for tar... (cached) /usr/bin/tar checking whether tar supports -q... yes (bsdtar) checking for tar... (cached) /usr/bin/tar checking for gnutar... (cached) /usr/bin/gnutar checking for which tar variant to use... /usr/bin/gnutar checking for /usr/bin/gnutar --no-same-owner support... yes checking for patch... (cached) /usr/bin/patch checking for gpatch... no checking for GNU (FSF) patch... /usr/bin/patch checking how to mark unused variables... checking for gcc symbol visibility attribute... attribute((visibility("hidden"))) checking for the pthreads library -lpthreads... no checking whether pthreads work without any flags... yes checking for joinable pthread attribute... PTHREAD_CREATE_JOINABLE checking if more special flags are required for pthreads... -D_THREAD_SAFE checking how to run the Objective C preprocessor... gcc -E checking for grep that handles long lines and -e... /usr/bin/grep checking for egrep... /usr/bin/grep -E checking for ANSI C header files... yes checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes checking objc/objc.h usability... yes checking objc/objc.h presence... yes checking for objc/objc.h... yes checking if linking libobjc requires pthreads... no checking for Apple Objective-C runtime... yes checking for GNU Objective C runtime... no configure: Using Apple Objective-C runtime checking for Apple Foundation library... no configure: WARNING: GNUSTEP_SYSTEM_ROOT is not defined in your environment, preventing the use of GNUstep's Foundation library configure: error: Could not find a working Foundation implementation

[cquiter@…]

config.log