I looked through the config.log (and have included it as an attachment) but this is all I noticed...
configure:5258: checking whether objc has thread support
configure:5288: gcc -o conftest -g -O2 -x objective-c -I. -fgnu-runtime -DGNU_RUNTIME conftest.c -lobjc -lpthread >&5
In file included from conftest.c:9:0:
config_thread.m:7:1: warning: incomplete implementation of class 'NXConstantString'
config_thread.m:7:1: warning: method definition for '-length' not found
config_thread.m:7:1: warning: method definition for '-cString' not found
configure:5288: $? = 0
address@hidden:/usr/local/GNUstep/share/GNUstep/Makefiles$ ls
Additional fixpath.sh os.sh
aggregate.make framework.make palette.make
application.make GNUstep.csh parallel-subdirectories.make
app-wrapper.template gnustep-make-help print_unique_pathlist.sh
Auxiliary GNUstep-reset.sh relative_path.sh
bundle.make GNUstep.sh resource-set.make
clean_cpu.sh gswapp.make rules.make
clean_os.sh gswbundle.make serial-subdirectories.make
clean_vendor.sh install-sh service.make
clibrary.make Instance spec-rules.template
common.make java-executable.template strip_makefiles.sh
config.guess java.make subproject.make
config.make java-tool.make tar-exclude-list
config-noarch.make jni.make target.make
config.sub library-combo.make test-application.make
cpu.sh library.make TestFramework
ctool.make Master test-library.make
documentation.make messages.make test-tool.make
empty.make mkinstalldirs tool.make
executable.template names.make vendor.sh
filesystem.csh native-library.make x86_64
filesystem.make nsi-app.template
filesystem.sh objc.make