Homebrew libxml2 Build Failure

04.python

$ cat ~/Library/Logs/Homebrew/libxml2/04.python
/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py:251: UserWarning: 'licence' distribution option is deprecated; use 'license'
  warnings.warn(msg)
libxslt stub generator not found, libxslt not built
running install
running build
running build_py
creating build
creating build/lib.macosx-10.9-intel-2.7
copying libxml2.py -> build/lib.macosx-10.9-intel-2.7
copying drv_libxml2.py -> build/lib.macosx-10.9-intel-2.7
running build_ext
building 'libxml2mod' extension
creating build/temp.macosx-10.9-intel-2.7
clang -fno-strict-aliasing -fno-common -dynamic -arch x86_64 -arch i386 -g -Os -pipe -fno-common -fno-strict-aliasing -fwrapv -mno-fused-madd -DENABLE_DTRACE -DMACOSX -DNDEBUG -Wall -Wstrict-prototypes -Wshorten-64-to-32 -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch x86_64 -arch i386 -pipe -D_REENTRANT=1 -I/usr/local/Cellar/libxml2/2.9.1/include/libxml2 -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c libxml2-py.c -o build/temp.macosx-10.9-intel-2.7/libxml2-py.o
clang: error: unknown argument: '-mno-fused-madd' [-Wunused-command-line-argument-hard-error-in-future]
clang: note: this will be a hard error (cannot be downgraded to a warning) in the future
error: command 'clang' failed with exit status 1

HOMEBREW_VERSION: 0.9.5
HEAD: 66c97ac4ce9f538d4ae3649d7bd305014e7b6c91
CPU: quad-core 64-bit arrandale
OS X: 10.9.2-x86_64
Xcode: 5.1
CLT: 5.1.0.0.1.1393561416
X11: N/A

brew-config.log

$ brew --config
HOMEBREW_VERSION: 0.9.5
ORIGIN: https://github.com/Homebrew/homebrew
HEAD: 66c97ac4ce9f538d4ae3649d7bd305014e7b6c91
HOMEBREW_PREFIX: /usr/local
HOMEBREW_CELLAR: /usr/local/Cellar
CPU: quad-core 64-bit arrandale
OS X: 10.9.2-x86_64
Xcode: 5.1
CLT: 5.1.0.0.1.1393561416
Clang: 5.1 build 503
X11: N/A
System Ruby: 1.8.7-358
Perl: /usr/bin/perl
Python: /usr/bin/python
Ruby: /usr/local/bin/ruby => /usr/local/Cellar/ruby/2.1.1/bin/ruby

$ clang --version
Apple LLVM version 5.1 (clang-503.0.38) (based on LLVM 3.4svn)
Target: x86_64-apple-darwin13.1.0
Thread model: posix

$ xcrun clang --version
Apple LLVM version 5.1 (clang-503.0.38) (based on LLVM 3.4svn)
Target: x86_64-apple-darwin13.1.0
Thread model: posix

brew-doctor.log

$ brew doctor
Your system is ready to brew.

install.log

$ HOMEBREW_MAKE_JOBS=1 brew install -v libxml2 2>&1
==> Downloading ftp://xmlsoft.org/libxml2/libxml2-2.9.1.tar.gz
Already downloaded: /Library/Caches/Homebrew/libxml2-2.9.1.tar.gz
==> Verifying libxml2-2.9.1.tar.gz checksum
tar xf /Library/Caches/Homebrew/libxml2-2.9.1.tar.gz
==> ./configure --disable-dependency-tracking --prefix=/usr/local/Cellar/libxml2/2.9.1 --without-python
checking build system type... x86_64-apple-darwin13.1.0
checking host system type... x86_64-apple-darwin13.1.0
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... ./install-sh -c -d
checking for gawk... no
checking for mawk... no
checking for nawk... no
checking for awk... awk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking for gcc... 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 style of include used by make... GNU
checking dependency style of clang... none
checking whether ln -s works... yes
checking how to run the C preprocessor... clang -E
checking for mv... /bin/mv
checking for tar... /usr/bin/tar
checking for perl... /usr/bin/perl
checking for wget... /usr/bin/wget
checking for xmllint... /usr/bin/xmllint
checking for xsltproc... /usr/bin/xsltproc
checking how to print strings... printf
checking for a sed that does not truncate output... /usr/local/Library/ENV/4.3/sed
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for fgrep... /usr/bin/grep -F
checking for ld used by clang... /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld
checking if the linker (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld) is GNU ld... no
checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm
checking the name lister (/usr/bin/nm) interface... BSD nm
checking the maximum length of command line arguments... 196608
checking whether the shell understands some XSI constructs... yes
checking whether the shell understands "+="... yes
checking how to convert x86_64-apple-darwin13.1.0 file names to x86_64-apple-darwin13.1.0 format... func_convert_file_noop
checking how to convert x86_64-apple-darwin13.1.0 file names to toolchain format... func_convert_file_noop
checking for /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld option to reload object files... -r
checking for objdump... no
checking how to recognize dependent libraries... pass_all
checking for dlltool... no
checking how to associate runtime and link libraries... printf %s\n
checking for ar... ar
checking for archiver @FILE support... no
checking for strip... strip
checking for ranlib... ranlib
checking command to parse /usr/bin/nm output from clang object... ok
checking for sysroot... no
checking for mt... no
checking if : is a manifest tool... no
checking for dsymutil... dsymutil
checking for nmedit... nmedit
checking for lipo... lipo
checking for otool... otool
checking for otool64... no
checking for -single_module linker flag... yes
checking for -exported_symbols_list linker flag... yes
checking for -force_load linker flag... yes
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 for dlfcn.h... yes
checking for objdir... .libs
checking if clang supports -fno-rtti -fno-exceptions... yes
checking for clang option to produce PIC... -fno-common -DPIC
checking if clang PIC flag -fno-common -DPIC works... yes
checking if clang static flag -static works... no
checking if clang supports -c -o file.o... yes
checking if clang supports -c -o file.o... (cached) yes
checking whether the clang linker (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld) supports shared libraries... yes
checking dynamic linker characteristics... darwin13.1.0 dyld
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... yes
Checking zlib
checking zlib.h usability... yes
checking zlib.h presence... yes
checking for zlib.h... yes
checking for gzread in -lz... yes
Checking lzma
checking lzma.h usability... no
checking lzma.h presence... no
checking for lzma.h... no
Checking headers
checking for dirent.h that defines DIR... yes
checking for library containing opendir... none required
checking for ANSI C header files... (cached) yes
checking fcntl.h usability... yes
checking fcntl.h presence... yes
checking for fcntl.h... yes
checking for unistd.h... (cached) yes
checking ctype.h usability... yes
checking ctype.h presence... yes
checking for ctype.h... yes
checking dirent.h usability... yes
checking dirent.h presence... yes
checking for dirent.h... yes
checking errno.h usability... yes
checking errno.h presence... yes
checking for errno.h... yes
checking malloc.h usability... no
checking malloc.h presence... no
checking for malloc.h... no
checking stdarg.h usability... yes
checking stdarg.h presence... yes
checking for stdarg.h... yes
checking for sys/stat.h... (cached) yes
checking for sys/types.h... (cached) yes
checking for stdint.h... (cached) yes
checking for inttypes.h... (cached) yes
checking time.h usability... yes
checking time.h presence... yes
checking for time.h... yes
checking ansidecl.h usability... no
checking ansidecl.h presence... no
checking for ansidecl.h... no
checking ieeefp.h usability... no
checking ieeefp.h presence... no
checking for ieeefp.h... no
checking nan.h usability... no
checking nan.h presence... no
checking for nan.h... no
checking math.h usability... yes
checking math.h presence... yes
checking for math.h... yes
checking limits.h usability... yes
checking limits.h presence... yes
checking for limits.h... yes
checking fp_class.h usability... no
checking fp_class.h presence... no
checking for fp_class.h... no
checking float.h usability... yes
checking float.h presence... yes
checking for float.h... yes
checking for stdlib.h... (cached) yes
checking for sys/socket.h... yes
checking for netinet/in.h... yes
checking for arpa/inet.h... yes
checking netdb.h usability... yes
checking netdb.h presence... yes
checking for netdb.h... yes
checking sys/time.h usability... yes
checking sys/time.h presence... yes
checking for sys/time.h... yes
checking sys/select.h usability... yes
checking sys/select.h presence... yes
checking for sys/select.h... yes
checking poll.h usability... yes
checking poll.h presence... yes
checking for poll.h... yes
checking sys/mman.h usability... yes
checking sys/mman.h presence... yes
checking for sys/mman.h... yes
checking sys/timeb.h usability... yes
checking sys/timeb.h presence... yes
checking for sys/timeb.h... yes
checking signal.h usability... yes
checking signal.h presence... yes
checking for signal.h... yes
checking for arpa/nameser.h... yes
checking for resolv.h... yes
checking dl.h usability... no
checking dl.h presence... no
checking for dl.h... no
checking for dlfcn.h... (cached) yes
Checking types
checking for uint32_t... yes
Checking libraries
checking for strftime... yes
checking for strdup... yes
checking for strndup... yes
checking for strerror... yes
checking for finite... yes
checking for isnand... no
checking for fp_class... no
checking for class... no
checking for fpclass... no
checking for strftime... (cached) yes
checking for localtime... yes
checking for gettimeofday... yes
checking for ftime... yes
checking for stat... yes
checking for _stat... no
checking for signal... yes
checking for rand... yes
checking for rand_r... yes
checking for srand... yes
checking for time... yes
checking for isascii... yes
checking for mmap... yes
checking for munmap... yes
checking for putenv... yes
checking for va_copy... yes
checking for library containing gethostent... none required
checking for library containing setsockopt... none required
checking for library containing connect... none required
checking for type of socket length (socklen_t)... socklen_t *
checking whether to enable IPv6... yes
checking struct sockaddr::ss_family... yes
checking for getaddrinfo... yes
checking for isnan... yes
checking for isinf... yes
checking for shl_load... no
checking for shl_load in -ldld... no
checking for dlopen... yes
Checking configuration requirements
Enabling multithreaded support
checking pthread.h usability... yes
checking pthread.h presence... yes
checking for pthread.h... yes
checking for pthread_join in -lpthread... yes
checking iconv.h usability... yes
checking iconv.h presence... yes
checking for iconv.h... yes
checking for iconv... no
checking for iconv in -liconv... yes
checking for iconv declaration... 
	extern size_t iconv (iconv_t cd,  char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
Disabling ICU support
Enabled Schematron support
Enabled Schemas/Relax-NG support
checking for printf... yes
checking for sprintf... yes
checking for fprintf... yes
checking for snprintf... yes
checking for vfprintf... yes
checking for vsprintf... yes
checking for vsnprintf... yes
checking for sscanf... yes
Disabling code coverage for GCC
configure: creating ./config.status
config.status: creating libxml2.spec
config.status: creating Makefile
config.status: creating include/Makefile
config.status: creating include/libxml/Makefile
config.status: creating doc/Makefile
config.status: creating doc/examples/Makefile
config.status: creating doc/devhelp/Makefile
config.status: creating example/Makefile
config.status: creating python/Makefile
config.status: creating python/tests/Makefile
config.status: creating xstc/Makefile
config.status: creating include/libxml/xmlversion.h
config.status: creating xml2-config
config.status: creating libxml-2.0.pc
config.status: creating libxml-2.0-uninstalled.pc
config.status: creating python/setup.py
config.status: creating config.h
config.status: executing depfiles commands
config.status: executing libtool commands
Done configuring
==> make
/Applications/Xcode.app/Contents/Developer/usr/bin/make  all-recursive
Making all in include
Making all in libxml
make[3]: Nothing to be done for `all'.
make[3]: Nothing to be done for `all-am'.
Making all in .
  CC     SAX.lo
  CC     entities.lo
  CC     encoding.lo
  CC     error.lo
  CC     parserInternals.lo
  CC     parser.lo
  CC     tree.lo
  CC     hash.lo
  CC     list.lo
  CC     xmlIO.lo
  CC     xmlmemory.lo
  CC     uri.lo
  CC     valid.lo
  CC     xlink.lo
  CC     HTMLparser.lo
  CC     HTMLtree.lo
  CC     debugXML.lo
  CC     xpath.lo
  CC     xpointer.lo
  CC     xinclude.lo
  CC     nanohttp.lo
  CC     nanoftp.lo
  CC     catalog.lo
  CC     globals.lo
  CC     threads.lo
  CC     c14n.lo
  CC     xmlstring.lo
  CC     buf.lo
  CC     xmlregexp.lo
  CC     xmlschemas.lo
  CC     xmlschemastypes.lo
  CC     xmlunicode.lo
  CC     xmlreader.lo
  CC     relaxng.lo
  CC     dict.lo
  CC     SAX2.lo
  CC     xmlwriter.lo
  CC     legacy.lo
  CC     chvalid.lo
  CC     pattern.lo
  CC     xmlsave.lo
  CC     xmlmodule.lo
  CC     schematron.lo
  CC     xzlib.lo
  CCLD   libxml2.la
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: .libs/libxml2.a(xzlib.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: .libs/libxml2.a(xzlib.o) has no symbols
  CC     testdso.lo
  CCLD   testdso.la
  CC     xmllint.o
  CCLD   xmllint
  CC     xmlcatalog.o
  CCLD   xmlcatalog
  CC     testSchemas.o
  CCLD   testSchemas
  CC     testRelax.o
  CCLD   testRelax
  CC     testSAX.o
  CCLD   testSAX
  CC     testHTML.o
  CCLD   testHTML
  CC     testXPath.o
  CCLD   testXPath
  CC     testURI.o
  CCLD   testURI
  CC     testThreads.o
  CCLD   testThreads
  CC     testC14N.o
  CCLD   testC14N
  CC     testAutomata.o
  CCLD   testAutomata
  CC     testRegexp.o
  CCLD   testRegexp
  CC     testReader.o
  CCLD   testReader
  CC     testapi.o
  CCLD   testapi
  CC     testModule.o
  CCLD   testModule
  CC     runtest.o
  CCLD   runtest
  CC     runsuite.o
  CCLD   runsuite
  CC     testchar.o
  CCLD   testchar
  CC     testdict.o
  CCLD   testdict
  CC     runxmlconf.o
  CCLD   runxmlconf
  CC     testrecurse.o
  CCLD   testrecurse
  CC     testlimits.o
  CCLD   testlimits
sed -e 's?\@XML_LIBDIR\@?-L/usr/local/Cellar/libxml2/2.9.1/lib?g' \
	    -e 's?\@XML_INCLUDEDIR\@?-I/usr/local/Cellar/libxml2/2.9.1/include/libxml2?g' \
	    -e 's?\@VERSION\@?2.9.1?g' \
	    -e 's?\@XML_LIBS\@?-lxml2 -lz -lpthread  -liconv -lm ?g' \
	       < ./xml2Conf.sh.in > xml2Conf.tmp \
	&& mv xml2Conf.tmp xml2Conf.sh
Making all in doc
Making all in .
make[3]: Nothing to be done for `all-am'.
Making all in devhelp
make[3]: Nothing to be done for `all'.
Making all in examples
  CC     io1.o
  CCLD   io1
  CC     io2.o
  CCLD   io2
  CC     parse1.o
  CCLD   parse1
  CC     parse2.o
  CCLD   parse2
  CC     parse3.o
  CCLD   parse3
  CC     parse4.o
  CCLD   parse4
  CC     reader1.o
  CCLD   reader1
  CC     reader2.o
  CCLD   reader2
  CC     reader3.o
  CCLD   reader3
  CC     reader4.o
  CCLD   reader4
  CC     testWriter.o
  CCLD   testWriter
  CC     tree1.o
  CCLD   tree1
  CC     tree2.o
  CCLD   tree2
  CC     xpath1.o
  CCLD   xpath1
  CC     xpath2.o
  CCLD   xpath2
Making all in example
  CC     gjobread.o
  CCLD   gjobread
Making all in xstc
make[2]: Nothing to be done for `all'.
==> make install
/Applications/Xcode.app/Contents/Developer/usr/bin/make  install-recursive
Making install in include
Making install in libxml
make[4]: Nothing to be done for `install-exec-am'.
 ../.././install-sh -c -d '/usr/local/Cellar/libxml2/2.9.1/include/libxml2/libxml'
 /usr/bin/install -c -m 644 SAX.h entities.h encoding.h parser.h parserInternals.h xmlerror.h HTMLparser.h HTMLtree.h debugXML.h tree.h list.h hash.h xpath.h xpathInternals.h xpointer.h xinclude.h xmlIO.h xmlmemory.h nanohttp.h nanoftp.h uri.h valid.h xlink.h xmlversion.h DOCBparser.h catalog.h threads.h globals.h c14n.h xmlautomata.h xmlregexp.h xmlmodule.h xmlschemas.h schemasInternals.h xmlschemastypes.h xmlstring.h xmlunicode.h xmlreader.h relaxng.h dict.h '/usr/local/Cellar/libxml2/2.9.1/include/libxml2/libxml'
 /usr/bin/install -c -m 644 SAX2.h xmlexports.h xmlwriter.h chvalid.h pattern.h xmlsave.h schematron.h '/usr/local/Cellar/libxml2/2.9.1/include/libxml2/libxml'
make[4]: Nothing to be done for `install-exec-am'.
make[4]: Nothing to be done for `install-data-am'.
Making install in .
 ./install-sh -c -d '/usr/local/Cellar/libxml2/2.9.1/lib'
 /bin/sh ./libtool   --mode=install /usr/bin/install -c   libxml2.la '/usr/local/Cellar/libxml2/2.9.1/lib'
libtool: install: /usr/bin/install -c .libs/libxml2.2.dylib /usr/local/Cellar/libxml2/2.9.1/lib/libxml2.2.dylib
libtool: install: (cd /usr/local/Cellar/libxml2/2.9.1/lib && { ln -s -f libxml2.2.dylib libxml2.dylib || { rm -f libxml2.dylib && ln -s libxml2.2.dylib libxml2.dylib; }; })
libtool: install: /usr/bin/install -c .libs/libxml2.lai /usr/local/Cellar/libxml2/2.9.1/lib/libxml2.la
libtool: install: /usr/bin/install -c .libs/libxml2.a /usr/local/Cellar/libxml2/2.9.1/lib/libxml2.a
libtool: install: chmod 644 /usr/local/Cellar/libxml2/2.9.1/lib/libxml2.a
libtool: install: ranlib /usr/local/Cellar/libxml2/2.9.1/lib/libxml2.a
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: /usr/local/Cellar/libxml2/2.9.1/lib/libxml2.a(xzlib.o) has no symbols
 ./install-sh -c -d '/usr/local/Cellar/libxml2/2.9.1/bin'
  /bin/sh ./libtool   --mode=install /usr/bin/install -c xmllint xmlcatalog '/usr/local/Cellar/libxml2/2.9.1/bin'
libtool: install: /usr/bin/install -c .libs/xmllint /usr/local/Cellar/libxml2/2.9.1/bin/xmllint
libtool: install: /usr/bin/install -c .libs/xmlcatalog /usr/local/Cellar/libxml2/2.9.1/bin/xmlcatalog
 ./install-sh -c -d '/usr/local/Cellar/libxml2/2.9.1/bin'
 /usr/bin/install -c xml2-config '/usr/local/Cellar/libxml2/2.9.1/bin'
 ./install-sh -c -d '/usr/local/Cellar/libxml2/2.9.1/lib'
 /usr/bin/install -c -m 644 xml2Conf.sh '/usr/local/Cellar/libxml2/2.9.1/lib'
./install-sh -c -d /usr/local/Cellar/libxml2/2.9.1/share/doc/libxml2-2.9.1
/usr/bin/install -c -m 0644 ./Copyright /usr/local/Cellar/libxml2/2.9.1/share/doc/libxml2-2.9.1
./install-sh -c -d /usr/local/Cellar/libxml2/2.9.1/share/doc/libxml2-2.9.1/examples
/usr/bin/install -c -m 0644 ./xmllint.c /usr/local/Cellar/libxml2/2.9.1/share/doc/libxml2-2.9.1/examples
/usr/bin/install -c -m 0644 ./testSAX.c /usr/local/Cellar/libxml2/2.9.1/share/doc/libxml2-2.9.1/examples
/usr/bin/install -c -m 0644 ./testHTML.c /usr/local/Cellar/libxml2/2.9.1/share/doc/libxml2-2.9.1/examples
/usr/bin/install -c -m 0644 ./testXPath.c /usr/local/Cellar/libxml2/2.9.1/share/doc/libxml2-2.9.1/examples
 ./install-sh -c -d '/usr/local/Cellar/libxml2/2.9.1/share/aclocal'
 /usr/bin/install -c -m 644 libxml.m4 '/usr/local/Cellar/libxml2/2.9.1/share/aclocal'
 ./install-sh -c -d '/usr/local/Cellar/libxml2/2.9.1/share/man/man1'
 /usr/bin/install -c -m 644 xml2-config.1 '/usr/local/Cellar/libxml2/2.9.1/share/man/man1'
 ./install-sh -c -d '/usr/local/Cellar/libxml2/2.9.1/share/man/man3'
 /usr/bin/install -c -m 644 libxml.3 '/usr/local/Cellar/libxml2/2.9.1/share/man/man3'
 ./install-sh -c -d '/usr/local/Cellar/libxml2/2.9.1/lib/pkgconfig'
 /usr/bin/install -c -m 644 libxml-2.0.pc '/usr/local/Cellar/libxml2/2.9.1/lib/pkgconfig'
Making install in doc
Making install in .
make[4]: Nothing to be done for `install-exec-am'.
.././install-sh -c -d /usr/local/Cellar/libxml2/2.9.1/share/doc/libxml2-2.9.1/html
/usr/bin/install -c -m 0644 ./xml.html ./encoding.html ./FAQ.html ./structure.gif ./DOM.gif ./smallfootonly.gif ./redhat.gif ./libxml.gif ./w3c.png ./Libxml2-Logo-180x168.gif ./Libxml2-Logo-90x34.gif /usr/local/Cellar/libxml2/2.9.1/share/doc/libxml2-2.9.1/html
.././install-sh -c -d /usr/local/Cellar/libxml2/2.9.1/share/doc/libxml2-2.9.1/html/html
/usr/bin/install -c -m 0644 ./html/*.html /usr/local/Cellar/libxml2/2.9.1/share/doc/libxml2-2.9.1/html/html
/usr/bin/install -c -m 0644 ./html/*.png /usr/local/Cellar/libxml2/2.9.1/share/doc/libxml2-2.9.1/html/html
.././install-sh -c -d /usr/local/Cellar/libxml2/2.9.1/share/doc/libxml2-2.9.1/html/tutorial
/usr/bin/install -c -m 0644 ./tutorial/*.* \
		/usr/local/Cellar/libxml2/2.9.1/share/doc/libxml2-2.9.1/html/tutorial
.././install-sh -c -d /usr/local/Cellar/libxml2/2.9.1/share/doc/libxml2-2.9.1/html/tutorial/images
/usr/bin/install -c -m 0644 ./tutorial/images/*.* \
		/usr/local/Cellar/libxml2/2.9.1/share/doc/libxml2-2.9.1/html/tutorial/images
.././install-sh -c -d /usr/local/Cellar/libxml2/2.9.1/share/doc/libxml2-2.9.1/html/tutorial/images/callouts
/usr/bin/install -c -m 0644 ./tutorial/images/callouts/*.* \
		/usr/local/Cellar/libxml2/2.9.1/share/doc/libxml2-2.9.1/html/tutorial/images/callouts
 .././install-sh -c -d '/usr/local/Cellar/libxml2/2.9.1/share/man/man1'
 /usr/bin/install -c -m 644 xmllint.1 xmlcatalog.1 '/usr/local/Cellar/libxml2/2.9.1/share/man/man1'
Making install in devhelp
make[4]: Nothing to be done for `install-exec-am'.
 ../.././install-sh -c -d '/usr/local/Cellar/libxml2/2.9.1/share/gtk-doc/html/libxml2'
 /usr/bin/install -c -m 644 libxml2.devhelp general.html index.html libxml2-c14n.html libxml2-catalog.html libxml2-chvalid.html libxml2-debugXML.html libxml2-dict.html libxml2-DOCBparser.html libxml2-encoding.html libxml2-entities.html libxml2-globals.html libxml2-hash.html libxml2-HTMLparser.html libxml2-HTMLtree.html libxml2-list.html libxml2-nanoftp.html libxml2-nanohttp.html libxml2-parser.html libxml2-parserInternals.html libxml2-pattern.html libxml2-relaxng.html libxml2-SAX2.html libxml2-SAX.html libxml2-schemasInternals.html libxml2-schematron.html libxml2-threads.html libxml2-tree.html libxml2-uri.html libxml2-valid.html libxml2-xinclude.html libxml2-xlink.html libxml2-xmlautomata.html libxml2-xmlerror.html libxml2-xmlexports.html libxml2-xmlIO.html libxml2-xmlmemory.html libxml2-xmlmodule.html libxml2-xmlreader.html libxml2-xmlregexp.html '/usr/local/Cellar/libxml2/2.9.1/share/gtk-doc/html/libxml2'
 /usr/bin/install -c -m 644 libxml2-xmlsave.html libxml2-xmlschemas.html libxml2-xmlschemastypes.html libxml2-xmlstring.html libxml2-xmlunicode.html libxml2-xmlversion.html libxml2-xmlwriter.html libxml2-xpath.html libxml2-xpathInternals.html libxml2-xpointer.html home.png left.png right.png up.png style.css '/usr/local/Cellar/libxml2/2.9.1/share/gtk-doc/html/libxml2'
Making install in examples
make[4]: Nothing to be done for `install-exec-am'.
../.././install-sh -c -d /usr/local/Cellar/libxml2/2.9.1/share/doc/libxml2-2.9.1/html
/usr/bin/install -c -m 0644 ./*.html ./*.c ./*.xml ./*.xsl ./*.res /usr/local/Cellar/libxml2/2.9.1/share/doc/libxml2-2.9.1/html
Making install in example
make[3]: Nothing to be done for `install-exec-am'.
make[3]: Nothing to be done for `install-data-am'.
Making install in xstc
make[3]: Nothing to be done for `install-exec-am'.
make[3]: Nothing to be done for `install-data-am'.
==> python setup.py install --prefix=/usr/local/Cellar/libxml2/2.9.1
/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py:251: UserWarning: 'licence' distribution option is deprecated; use 'license'
  warnings.warn(msg)
libxslt stub generator not found, libxslt not built
running install
running build
running build_py
creating build
creating build/lib.macosx-10.9-intel-2.7
copying libxml2.py -> build/lib.macosx-10.9-intel-2.7
copying drv_libxml2.py -> build/lib.macosx-10.9-intel-2.7
running build_ext
building 'libxml2mod' extension
creating build/temp.macosx-10.9-intel-2.7
clang -fno-strict-aliasing -fno-common -dynamic -arch x86_64 -arch i386 -g -Os -pipe -fno-common -fno-strict-aliasing -fwrapv -mno-fused-madd -DENABLE_DTRACE -DMACOSX -DNDEBUG -Wall -Wstrict-prototypes -Wshorten-64-to-32 -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch x86_64 -arch i386 -pipe -D_REENTRANT=1 -I/usr/local/Cellar/libxml2/2.9.1/include/libxml2 -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c libxml2-py.c -o build/temp.macosx-10.9-intel-2.7/libxml2-py.o
clang: error: unknown argument: '-mno-fused-madd' [-Wunused-command-line-argument-hard-error-in-future]
clang: note: this will be a hard error (cannot be downgraded to a warning) in the future
error: command 'clang' failed with exit status 1
Error: libxml2 did not build
==> Configuration
HOMEBREW_VERSION: 0.9.5
HEAD: 66c97ac4ce9f538d4ae3649d7bd305014e7b6c91
CPU: quad-core 64-bit arrandale
OS X: 10.9.2-x86_64
Xcode: 5.1
CLT: 5.1.0.0.1.1393561416
X11: N/A
==> ENV
HOMEBREW_CC: clang
HOMEBREW_CXX: clang++
CMAKE_PREFIX_PATH: /usr/local
CMAKE_INCLUDE_PATH: /usr/include/libxml2:/System/Library/Frameworks/OpenGL.framework/Versions/Current/Headers
CMAKE_LIBRARY_PATH: /System/Library/Frameworks/OpenGL.framework/Versions/Current/Libraries
PKG_CONFIG_LIBDIR: /usr/lib/pkgconfig:/usr/local/Library/ENV/pkgconfig/10.9
HOMEBREW_MAKE_JOBS: 1
ACLOCAL_PATH: /usr/local/share/aclocal
PATH: /usr/local/Library/ENV/4.3:/usr/bin:/bin:/usr/sbin:/sbin

Logs:
     /Users/gary/Library/Logs/Homebrew/libxml2/01.configure
     /Users/gary/Library/Logs/Homebrew/libxml2/01.configure.cc
     /Users/gary/Library/Logs/Homebrew/libxml2/02.make
     /Users/gary/Library/Logs/Homebrew/libxml2/02.make.cc
     /Users/gary/Library/Logs/Homebrew/libxml2/03.make
     /Users/gary/Library/Logs/Homebrew/libxml2/04.python
     /Users/gary/Library/Logs/Homebrew/libxml2/04.python.cc
     /Users/gary/Library/Logs/Homebrew/libxml2/config.log

These open issues may also help:
Linked problem with  libplist and libxml2 (https://github.com/Homebrew/homebrew/issues/26135)