bash-3.2$ sudo ./runConfigureICU MacOSX export CPP= CC= CXX= CPPFLAGS= CFLAGS= -O2 CXXFLAGS= -O2 LDFLAGS= MAKE= Running ./configure for MacOS X (Darwin) using the GNU C++ compiler checking for ICU version numbers... release 51.2, library 51.2, unicode version 6.2 checking build system type... x86_64-apple-darwin10.8.0 checking host system type... x86_64-apple-darwin10.8.0 checking whether to build debug libraries... no checking whether to build release libraries... yes checking for clang... clang 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 clang accepts -g... yes checking for clang option to accept ISO C89... none needed checking for clang++... no checking for g++... g++ checking whether we are using the GNU C++ compiler... yes checking whether g++ accepts -g... yes checking how to run the C preprocessor... clang -E checking for a BSD-compatible install... /usr/bin/install -c checking for gmake... /opt/local/bin/gmake checking for doxygen... no checking checking for executable suffix... checking whether strict compiling is on... yes 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 size of void *... 8 checking whether runnable 64 bit binaries are built by default... yes checking which Makefile fragment to use for x86_64-apple-darwin10.8.0... mh-darwin checking for floor in -lm... yes checking whether to build shared libraries... yes checking whether to build static libraries... no checking whether to enable auto cleanup of libraries... no checking whether to enable draft APIs... yes checking for ranlib... ranlib checking for ar... ar checking whether to enable renaming of symbols... yes checking whether to enable function and data tracing... no checking whether to enable dynamic loading of plugins... yes checking dlfcn.h usability... yes checking dlfcn.h presence... yes checking for dlfcn.h... yes checking for library containing dlopen... none required checking for dlopen... yes checking for gettimeofday... yes checking if we have a C++ compiler... Good checking if #include works... yes checking for pthread_attr_init in -lpthread... yes checking for mmap... yes checking for genccode assembly... checking for inttypes.h... (cached) yes checking dirent.h usability... yes checking dirent.h presence... yes checking for dirent.h... yes checking whether byte ordering is bigendian... no checking for nl_langinfo... yes checking for nl_langinfo's argument to obtain the codeset... CODESET checking for namespace support... no configure: error: Namespace support is required to build ICU.