libxml2 did not build on 10.4 under tigerbrew

brew --config

$ brew --config
HOMEBREW_VERSION: 0.9.4
ORIGIN: https://github.com/mistydemeo/tigerbrew.git
HEAD: be60f54c17f38b8f4b7be1254e97c42aa9b84822
HOMEBREW_PREFIX: /usr/local
HOMEBREW_CELLAR: /usr/local/Cellar
CPU: single-core 32-bit g4e
OS X: 10.4.11-Power Macintosh
Xcode: 2.5
GCC-4.0: build 5370
LLVM-GCC: N/A
Clang: N/A
X11: 1.1.3 => /usr/X11R6
System Ruby: 1.8.2
Perl: /usr/bin/perl
Python: /usr/bin/python => /System/Library/Frameworks/Python.framework/Versions/2.3/bin/python
Ruby: /usr/bin/ruby

brew_install_verbose_debug

$ brew install --verbose --debug libxml2
/usr/local/Library/brew.rb: loading /usr/local/Library/Formula/libxml2.rb
 Downloading ftp://xmlsoft.org/libxml2/libxml2-2.9.1.tar.gz
Already downloaded: /Library/Caches/Homebrew/libxml2-2.9.1.tar.gz
/usr/local/Library/Formula/libxml2.rb: loading /usr/local/Library/Formula/openssl.rb
/usr/bin/tar xzf /Library/Caches/Homebrew/libxml2-2.9.1.tar.gz
./configure --disable-dependency-tracking --prefix=/usr/local/Cellar/libxml2/2.9.1 --without-python
./configure --disable-dependency-tracking --prefix=/usr/local/Cellar/libxml2/2.9.1 --without-python
checking build system type... powerpc-apple-darwin8.11.0
checking host system type... powerpc-apple-darwin8.11.0
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... /usr/bin/gcc-4.0
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 /usr/bin/gcc-4.0 accepts -g... yes
checking for /usr/bin/gcc-4.0 option to accept ISO C89... none needed
checking for style of include used by make... GNU
checking dependency style of /usr/bin/gcc-4.0... none
checking whether ln -s works... yes
checking how to run the C preprocessor... /usr/bin/gcc-4.0 -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/bin/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 /usr/bin/gcc-4.0... /usr/libexec/gcc/powerpc-apple-darwin8/4.0.1/ld
checking if the linker (/usr/libexec/gcc/powerpc-apple-darwin8/4.0.1/ld) is GNU ld... no
checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -p
checking the name lister (/usr/bin/nm -p) 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 "+="... no
checking how to convert powerpc-apple-darwin8.11.0 file names to powerpc-apple-darwin8.11.0 format... func_convert_file_noop
checking how to convert powerpc-apple-darwin8.11.0 file names to toolchain format... func_convert_file_noop
checking for /usr/libexec/gcc/powerpc-apple-darwin8/4.0.1/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 -p output from /usr/bin/gcc-4.0 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... otool64
checking for -single_module linker flag... no
checking for -exported_symbols_list linker flag... yes
checking for -force_load linker flag... /usr/libexec/gcc/powerpc-apple-darwin8/4.0.1/ld: unknown flag: -force_load
no
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 /usr/bin/gcc-4.0 supports -fno-rtti -fno-exceptions... yes
checking for /usr/bin/gcc-4.0 option to produce PIC... -fno-common -DPIC
checking if /usr/bin/gcc-4.0 PIC flag -fno-common -DPIC works... yes
checking if /usr/bin/gcc-4.0 static flag -static works... no
checking if /usr/bin/gcc-4.0 supports -c -o file.o... yes
checking if /usr/bin/gcc-4.0 supports -c -o file.o... (cached) yes
checking whether the /usr/bin/gcc-4.0 linker (/usr/libexec/gcc/powerpc-apple-darwin8/4.0.1/ld) supports shared libraries... yes
checking dynamic linker characteristics... darwin8.11.0 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... no
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, const 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
make 
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
warning: no debug map in executable (-arch ppc)
ranlib: file: .libs/libxml2.a(xzlib.o) has no symbols
ranlib: file: .libs/libxml2.a(xzlib.o) has no symbols
  CC     testdso.lo
  CCLD   testdso.la
warning: no debug map in executable (-arch ppc)
  CC     xmllint.o
  CCLD   xmllint
/usr/libexec/gcc/powerpc-apple-darwin8/4.0.1/ld: Undefined symbols:
_gzdirect
collect2: ld returned 1 exit status
make[2]: *** [xmllint] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2
/usr/local/Library/Homebrew/formula.rb:607:in `system'
BuildError: Failed executing: make 
1. raise
2. ignore
3. backtrace
4. irb
5. shell
Choose an action: 2
==> make install
make install 
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 .
  CCLD   xmllint
/usr/libexec/gcc/powerpc-apple-darwin8/4.0.1/ld: Undefined symbols:
_gzdirect
collect2: ld returned 1 exit status
make[2]: *** [xmllint] Error 1
make[1]: *** [install-recursive] Error 1
make: *** [install] Error 2
/usr/local/Library/Homebrew/formula.rb:607:in `system'
BuildError: Failed executing: make install 
1. raise
2. ignore
3. backtrace
4. irb
5. shell
Choose an action: 

libxml2_brew_log

==> Downloading ftp://xmlsoft.org/libxml2/libxml2-2.9.1.tar.gz
Already downloaded: /Library/Caches/Homebrew/libxml2-2.9.1.tar.gz
/usr/bin/tar xzf /Library/Caches/Homebrew/libxml2-2.9.1.tar.gz
==> ./configure --disable-dependency-tracking --prefix=/usr/local/Cellar/libxml2/2.9.1 --without-python
./configure --disable-dependency-tracking --prefix=/usr/local/Cellar/libxml2/2.9.1 --without-python
checking build system type... powerpc-apple-darwin8.11.0
checking host system type... powerpc-apple-darwin8.11.0
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... /usr/bin/gcc-4.0
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 /usr/bin/gcc-4.0 accepts -g... yes
checking for /usr/bin/gcc-4.0 option to accept ISO C89... none needed
checking for style of include used by make... GNU
checking dependency style of /usr/bin/gcc-4.0... none
checking whether ln -s works... yes
checking how to run the C preprocessor... /usr/bin/gcc-4.0 -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/bin/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 /usr/bin/gcc-4.0... /usr/libexec/gcc/powerpc-apple-darwin8/4.0.1/ld
checking if the linker (/usr/libexec/gcc/powerpc-apple-darwin8/4.0.1/ld) is GNU ld... no
checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -p
checking the name lister (/usr/bin/nm -p) 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 "+="... no
checking how to convert powerpc-apple-darwin8.11.0 file names to powerpc-apple-darwin8.11.0 format... func_convert_file_noop
checking how to convert powerpc-apple-darwin8.11.0 file names to toolchain format... func_convert_file_noop
checking for /usr/libexec/gcc/powerpc-apple-darwin8/4.0.1/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 -p output from /usr/bin/gcc-4.0 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... otool64
checking for -single_module linker flag... no
checking for -exported_symbols_list linker flag... yes
checking for -force_load linker flag... /usr/libexec/gcc/powerpc-apple-darwin8/4.0.1/ld: unknown flag: -force_load
no
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 /usr/bin/gcc-4.0 supports -fno-rtti -fno-exceptions... yes
checking for /usr/bin/gcc-4.0 option to produce PIC... -fno-common -DPIC
checking if /usr/bin/gcc-4.0 PIC flag -fno-common -DPIC works... yes
checking if /usr/bin/gcc-4.0 static flag -static works... no
checking if /usr/bin/gcc-4.0 supports -c -o file.o... yes
checking if /usr/bin/gcc-4.0 supports -c -o file.o... (cached) yes
checking whether the /usr/bin/gcc-4.0 linker (/usr/libexec/gcc/powerpc-apple-darwin8/4.0.1/ld) supports shared libraries... yes
checking dynamic linker characteristics... darwin8.11.0 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... no
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, const 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
make 
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
warning: no debug map in executable (-arch ppc)
  CC     testdso.lo
  CCLD   testdso.la
warning: no debug map in executable (-arch ppc)
  CC     xmllint.o
  CCLD   xmllint
==> Configuration
HOMEBREW_VERSION: 0.9.4
HEAD: be60f54c17f38b8f4b7be1254e97c42aa9b84822
CPU: single-core 32-bit g4e
OS X: 10.4.11-Power Macintosh
Xcode: 2.5
X11: 1.1.3 => /usr/X11R6
==> ENV
CC: /usr/bin/gcc-4.0
CXX: /usr/bin/g++-4.0
CFLAGS: -Os -w -pipe -mcpu=7450 -faltivec -mmacosx-version-min=10.4
CXXFLAGS: -Os -w -pipe -mcpu=7450 -faltivec -mmacosx-version-min=10.4
LDFLAGS: -L/usr/local/lib
MAKEFLAGS: -j1
MACOSX_DEPLOYMENT_TARGET: 10.4
PKG_CONFIG_LIBDIR: /usr/local/lib/pkgconfig:/usr/local/Library/ENV/pkgconfig/10.4:/usr/lib/pkgconfig
HOMEBREW_MAKE_JOBS: 1
ACLOCAL_PATH: /usr/local/share/aclocal
OBJC: /usr/bin/gcc-4.0
PATH: /bin:/sbin:/usr/bin:/usr/sbin:/usr/local/sbin:/usr/local/bin:~bin:/usr/local/Library/Contributions/cmd

Logs:       ~/Library/Logs/Homebrew/libxml2/config.log

terminal output from build

$ brew doctor
Your system is ready to brew.
$ HOMEBREW_MAKE_JOBS=1 VERBOSE=1 brew install libxml2 > libxml2_brew_log &
[1] 3810
$ ranlib: file: .libs/libxml2.a(xzlib.o) has no symbols
ranlib: file: .libs/libxml2.a(xzlib.o) has no symbols
/usr/libexec/gcc/powerpc-apple-darwin8/4.0.1/ld: Undefined symbols:
_gzdirect
collect2: ld returned 1 exit status
make[2]: *** [xmllint] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2
Error: libxml2 did not build