I am trying to install an old project that runs on Ruby 1.8.7-p370 and has a dependency on an old version of the libxml-ruby 2.3.2 gem on a Mac running OS X El Capitan.
The problem is that when trying to install the gem it won't build the native extension. Here is the complete error upon running gem install libxml-ruby -v '2.3.2':
Building native extensions. This could take a while...
ERROR: Error installing libxml-ruby:
ERROR: Failed to build gem native extension.
/Users/myusername/.rbenv/versions/1.8.7-p370/bin/ruby extconf.rb
checking for socket() in -lsocket... no
checking for gethostbyname() in -lnsl... no
checking for atan() in -lm... no
checking for atan() in -lm... yes
checking for inflate() in -lz... yes
checking for iconv_open() in -liconv... yes
checking for xmlParseDoc() in -lxml2... yes
checking for libxml/xmlversion.h... yes
creating extconf.h
creating Makefile
make
/usr/local/bin/gcc-4.2 -I. -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -DRUBY_EXTCONF_H=\"extconf.h\" -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -fno-common -O3 -Wno-error=shorten-64-to-32 -pipe -fno-common -I/usr/include/libxml2 -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -c libxml.c
couldn't understand kern.osversion `15.6.0'
/usr/local/bin/gcc-4.2 -I. -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -DRUBY_EXTCONF_H=\"extconf.h\" -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -fno-common -O3 -Wno-error=shorten-64-to-32 -pipe -fno-common -I/usr/include/libxml2 -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -c ruby_xml.c
couldn't understand kern.osversion `15.6.0'
/usr/local/bin/gcc-4.2 -I. -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -DRUBY_EXTCONF_H=\"extconf.h\" -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -fno-common -O3 -Wno-error=shorten-64-to-32 -pipe -fno-common -I/usr/include/libxml2 -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -c ruby_xml_attr.c
couldn't understand kern.osversion `15.6.0'
/usr/local/bin/gcc-4.2 -I. -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -DRUBY_EXTCONF_H=\"extconf.h\" -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -fno-common -O3 -Wno-error=shorten-64-to-32 -pipe -fno-common -I/usr/include/libxml2 -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -c ruby_xml_attr_decl.c
couldn't understand kern.osversion `15.6.0'
/usr/local/bin/gcc-4.2 -I. -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -DRUBY_EXTCONF_H=\"extconf.h\" -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -fno-common -O3 -Wno-error=shorten-64-to-32 -pipe -fno-common -I/usr/include/libxml2 -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -c ruby_xml_attributes.c
couldn't understand kern.osversion `15.6.0'
/usr/local/bin/gcc-4.2 -I. -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -DRUBY_EXTCONF_H=\"extconf.h\" -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -fno-common -O3 -Wno-error=shorten-64-to-32 -pipe -fno-common -I/usr/include/libxml2 -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -c ruby_xml_cbg.c
couldn't understand kern.osversion `15.6.0'
/usr/local/bin/gcc-4.2 -I. -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -DRUBY_EXTCONF_H=\"extconf.h\" -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -fno-common -O3 -Wno-error=shorten-64-to-32 -pipe -fno-common -I/usr/include/libxml2 -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -c ruby_xml_document.c
couldn't understand kern.osversion `15.6.0'
ruby_xml_document.c: In function ‘rxml_document_canonicalize’:
ruby_xml_document.c:334: warning: passing argument 4 of ‘xmlC14NDocDumpMemory’ from incompatible pointer type
/usr/local/bin/gcc-4.2 -I. -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -DRUBY_EXTCONF_H=\"extconf.h\" -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -fno-common -O3 -Wno-error=shorten-64-to-32 -pipe -fno-common -I/usr/include/libxml2 -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -c ruby_xml_dtd.c
couldn't understand kern.osversion `15.6.0'
/usr/local/bin/gcc-4.2 -I. -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -DRUBY_EXTCONF_H=\"extconf.h\" -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -fno-common -O3 -Wno-error=shorten-64-to-32 -pipe -fno-common -I/usr/include/libxml2 -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -c ruby_xml_encoding.c
couldn't understand kern.osversion `15.6.0'
/usr/local/bin/gcc-4.2 -I. -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -DRUBY_EXTCONF_H=\"extconf.h\" -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -fno-common -O3 -Wno-error=shorten-64-to-32 -pipe -fno-common -I/usr/include/libxml2 -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -c ruby_xml_error.c
couldn't understand kern.osversion `15.6.0'
/usr/local/bin/gcc-4.2 -I. -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -DRUBY_EXTCONF_H=\"extconf.h\" -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -fno-common -O3 -Wno-error=shorten-64-to-32 -pipe -fno-common -I/usr/include/libxml2 -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -c ruby_xml_html_parser.c
couldn't understand kern.osversion `15.6.0'
/usr/local/bin/gcc-4.2 -I. -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -DRUBY_EXTCONF_H=\"extconf.h\" -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -fno-common -O3 -Wno-error=shorten-64-to-32 -pipe -fno-common -I/usr/include/libxml2 -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -c ruby_xml_html_parser_context.c
couldn't understand kern.osversion `15.6.0'
/usr/local/bin/gcc-4.2 -I. -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -DRUBY_EXTCONF_H=\"extconf.h\" -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -fno-common -O3 -Wno-error=shorten-64-to-32 -pipe -fno-common -I/usr/include/libxml2 -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -c ruby_xml_html_parser_options.c
couldn't understand kern.osversion `15.6.0'
/usr/local/bin/gcc-4.2 -I. -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -DRUBY_EXTCONF_H=\"extconf.h\" -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -fno-common -O3 -Wno-error=shorten-64-to-32 -pipe -fno-common -I/usr/include/libxml2 -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -c ruby_xml_input_cbg.c
couldn't understand kern.osversion `15.6.0'
/usr/local/bin/gcc-4.2 -I. -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -DRUBY_EXTCONF_H=\"extconf.h\" -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -fno-common -O3 -Wno-error=shorten-64-to-32 -pipe -fno-common -I/usr/include/libxml2 -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -c ruby_xml_io.c
couldn't understand kern.osversion `15.6.0'
/usr/local/bin/gcc-4.2 -I. -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -DRUBY_EXTCONF_H=\"extconf.h\" -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -fno-common -O3 -Wno-error=shorten-64-to-32 -pipe -fno-common -I/usr/include/libxml2 -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -c ruby_xml_namespace.c
couldn't understand kern.osversion `15.6.0'
/usr/local/bin/gcc-4.2 -I. -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -DRUBY_EXTCONF_H=\"extconf.h\" -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -fno-common -O3 -Wno-error=shorten-64-to-32 -pipe -fno-common -I/usr/include/libxml2 -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -c ruby_xml_namespaces.c
couldn't understand kern.osversion `15.6.0'
/usr/local/bin/gcc-4.2 -I. -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -DRUBY_EXTCONF_H=\"extconf.h\" -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/Users/myusername/.rbenv/versions/1.8.7-p370/include -fno-common -O3 -Wno-error=shorten-64-to-32 -pipe -fno-common -I/usr/include/libxml2 -I. -I/Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/1.8/i686-darwin15.6.0 -I. -I/usr/local/include -c ruby_xml_node.c
couldn't understand kern.osversion `15.6.0'
ruby_xml_node.c: In function ‘rxml_node_to_s’:
ruby_xml_node.c:622: error: dereferencing pointer to incomplete type
ruby_xml_node.c:624: error: dereferencing pointer to incomplete type
make: *** [ruby_xml_node.o] Error 1
Gem files will remain installed in /Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/gems/1.8/gems/libxml-ruby-2.3.2 for inspection.
Results logged to /Users/myusername/.rbenv/versions/1.8.7-p370/lib/ruby/gems/1.8/gems/libxml-ruby-2.3.2/ext/libxml/gem_make.out
I have done some Googling but so far have not found a solution to the problem that works. Here are some of the things I have tried.
One suggestion was that uninstalling apple-gcc might work, but that leaves me without a compiler to build the native extension.
Another post suggested that this has to do with an incompatibility between libxml-ruby 2.3.2 and the more recent version of libxml that ships with OS X. However the following does not work since the MacOSX10.8 SDK does not seem to ship with Xcode anymore. Or am I missing something there?
export SDKROOT=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk
What steps can I take to remedy this problem? Thanks for your help!
