rb-libxml2 @2.3.4: error: use of undeclared identifier 'xlinkType'

[cooljeanius (Eric Gallager)]

/usr/bin/clang -I. -I. -I/opt/local/lib/ruby/1.8/x86_64-darwin20 -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_ruby_rb-libxml2/rb-libxml2/work/libxml-ruby-2.3.4/ext/libxml -I/usr/local/include -DRUBY_EXTCONF_H=\"extconf.h\" -I/opt/local/libexec/openssl10/include -isystem/opt/local/include -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE  -I/opt/local/libexec/openssl10/include -isystem/opt/local/include -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk -fno-common -pipe -I/opt/local/libexec/openssl10/include -Os -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk -arch x86_64  -fno-common -pipe -fno-common  -I/opt/local/include/libxml2 -I. -I/opt/local/lib/ruby/1.8/x86_64-darwin20 -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_ruby_rb-libxml2/rb-libxml2/work/libxml-ruby-2.3.4/ext/libxml -I/usr/local/include -arch x86_64 -c ruby_xml_node.c
ruby_xml_node.c:815:3: error: use of undeclared identifier 'xlinkType'
  xlinkType xlt;
  ^
ruby_xml_node.c:818:3: error: use of undeclared identifier 'xlt'
  xlt = xlinkIsLink(xnode->doc, xnode);
  ^
ruby_xml_node.c:818:9: error: implicit declaration of function 'xlinkIsLink' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
  xlt = xlinkIsLink(xnode->doc, xnode);
        ^
ruby_xml_node.c:820:7: error: use of undeclared identifier 'xlt'
  if (xlt == XLINK_TYPE_NONE)
      ^
ruby_xml_node.c:820:14: error: use of undeclared identifier 'XLINK_TYPE_NONE'
  if (xlt == XLINK_TYPE_NONE)
             ^
ruby_xml_node.c:837:3: error: use of undeclared identifier 'xlinkType'
  xlinkType xlt;
  ^
ruby_xml_node.c:840:3: error: use of undeclared identifier 'xlt'
  xlt = xlinkIsLink(xnode->doc, xnode);
  ^
ruby_xml_node.c:840:9: error: implicit declaration of function 'xlinkIsLink' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
  xlt = xlinkIsLink(xnode->doc, xnode);
        ^
ruby_xml_node.c:842:7: error: use of undeclared identifier 'xlt'
  if (xlt == XLINK_TYPE_NONE)
      ^
ruby_xml_node.c:842:14: error: use of undeclared identifier 'XLINK_TYPE_NONE'
  if (xlt == XLINK_TYPE_NONE)
             ^
ruby_xml_node.c:845:21: error: use of undeclared identifier 'xlt'
    return (INT2NUM(xlt));
                    ^
ruby_xml_node.c:859:3: error: use of undeclared identifier 'xlinkType'
  xlinkType xlt;
  ^
ruby_xml_node.c:862:3: error: use of undeclared identifier 'xlt'
  xlt = xlinkIsLink(xnode->doc, xnode);
  ^
ruby_xml_node.c:862:9: error: implicit declaration of function 'xlinkIsLink' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
  xlt = xlinkIsLink(xnode->doc, xnode);
        ^
ruby_xml_node.c:864:11: error: use of undeclared identifier 'xlt'
  switch (xlt)
          ^
ruby_xml_node.c:866:8: error: use of undeclared identifier 'XLINK_TYPE_NONE'
  case XLINK_TYPE_NONE:
       ^
ruby_xml_node.c:868:8: error: use of undeclared identifier 'XLINK_TYPE_SIMPLE'
  case XLINK_TYPE_SIMPLE:
       ^
ruby_xml_node.c:870:8: error: use of undeclared identifier 'XLINK_TYPE_EXTENDED'
  case XLINK_TYPE_EXTENDED:
       ^
ruby_xml_node.c:872:8: error: use of undeclared identifier 'XLINK_TYPE_EXTENDED_SET'
  case XLINK_TYPE_EXTENDED_SET:
       ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
make: *** [ruby_xml_node.o] Error 1
setup.rb:655:in `command': system("make") failed (RuntimeError)
	from setup.rb:664:in `make'
	from setup.rb:1258:in `setup_dir_ext'
	from setup.rb:1532:in `__send__'
	from setup.rb:1532:in `traverse'
	from setup.rb:1549:in `dive_into'
	from setup.rb:1530:in `traverse'
	from setup.rb:1534:in `traverse'
	from setup.rb:1533:in `each'
	from setup.rb:1533:in `traverse'
	from setup.rb:1549:in `dive_into'
	from setup.rb:1530:in `traverse'
	from setup.rb:1524:in `exec_task_traverse'
	from setup.rb:1519:in `each'
	from setup.rb:1519:in `exec_task_traverse'
	from setup.rb:1246:in `exec_setup'
	from setup.rb:996:in `exec_setup'
	from setup.rb:826:in `__send__'
	from setup.rb:826:in `invoke'
	from setup.rb:773:in `invoke'
	from setup.rb:1578
Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_ruby_rb-libxml2/rb-libxml2/work/libxml-ruby-2.3.4" && /opt/local/bin/ruby1.8 -rvendor-specific setup.rb setup 
Exit code: 1
Error: Failed to build rb-libxml2: command execution failed
DEBUG: Error code: CHILDSTATUS 24130 1

I'm on Big Sur with Xcode 13.

[cooljeanius (Eric Gallager)]

main.log for rb-libxml2

[ryandesign (Ryan Carsten Schmidt)]

The first thing to try is probably to update it to a newer version. The version we have, 2.3.4, is from December 2012. The latest version available, 4.0.0, is from December 2022.