Bundle install fails to install libxml-ruby

Question

I'm a new to Ruby world and I need to clone an existing project.

The instructions are:

source .env.development
bundle install

But it fails with:

Using libv8 3.16.14.15
Fetching libxml-ruby 2.9.0
Installing libxml-ruby 2.9.0 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

current directory: /Users/vlad/.rvm/gems/ruby-2.3.1/gems/libxml-ruby-2.9.0/ext/libxml
/Users/vlad/.rvm/rubies/ruby-2.3.1/bin/ruby -r ./siteconf20181109-46682-fvgifh.rb extconf.rb --use-system-libraries
checking for libxml/xmlversion.h in /opt/include/libxml2,/opt/local/include/libxml2,/usr/local/include/libxml2,/usr/include/libxml2... no
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.

Provided configuration options:
--with-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=/Users/vlad/.rvm/rubies/ruby-2.3.1/bin/$(RUBY_BASE_NAME)
--with-xml2-config
--without-xml2-config
--with-xml2-dir
--without-xml2-dir
--with-xml2-include
--without-xml2-include=${xml2-dir}/include
--with-xml2-lib
--without-xml2-lib=${xml2-dir}/lib
 extconf failure: need libxml2.

    Install the library or try one of the following options to extconf.rb:

      --with-xml2-config=/path/to/xml2-config
      --with-xml2-dir=/path/to/libxml2
      --with-xml2-lib=/path/to/libxml2/lib
      --with-xml2-include=/path/to/libxml2/include


To see why this extension failed to compile, please check the mkmf.log which can be found here:

  /Users/vlad/.rvm/gems/ruby-2.3.1/extensions/x86_64-darwin-18/2.3.0/libxml-ruby-2.9.0/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /Users/vlad/.rvm/gems/ruby-2.3.1/gems/libxml-ruby-2.9.0 for inspection.
Results logged to /Users/vlad/.rvm/gems/ruby-2.3.1/extensions/x86_64-darwin-18/2.3.0/libxml-ruby-2.9.0/gem_make.out

An error occurred while installing libxml-ruby (2.9.0), and Bundler cannot continue.
Make sure that `gem install libxml-ruby -v '2.9.0'` succeeds before bundling.

In Gemfile:
  upnxt_community_lib_common was resolved to 1.7.49, which depends on
    upnxt_processing_lib_document was resolved to 2.0.0, which depends on
      libxml-

If I want to execute the command that is suggested "gem install libxml-ruby -v '2.9.0'" I get the same error.

Operating System: MacOS Mojave, version 10.14. Ruby version needed for the project: ruby 2.3.1p112 (2016-04-26 revision 54768) [x86_64-darwin18]

I also tried this but it didn't helped.

Thanks in advance for any help!

Answer 1

I've encountered many tips while googling around today. I've tried to compile them into a logical order of some things to try:

Installing/debugging libxml on mac for ruby/rails.

There's a lot on this page already. But just to point out a few extra things I've gathered from elsewhere.

To me it seems more sensible to try to get a working bundle config command than to bypass this with a gem install command. So use skplunkerin's answer, or...

The following will configure it to use the system libxml headers:

bundle config --global build.libxml-ruby --with-xml2-include=`xcrun --show-sdk-path`/usr/include/libxml2
bundle install

...which worked better for me today. The libxml-ruby gem build was having issues with the latest homebrew installed libxml vs an older system libxml.

Answer 2

These steps worked for me (source)

brew install libxml2
bundle config --global build.libxml-ruby --with-xml2-config="$(brew --prefix libxml2)/bin/xml2-config"

then bundle install worked as expected

Answer 3

It solved for me in mac by running

gem install libxml-ruby -v '3.0.0' -- --with-xml2-config=/usr/local/opt/libxml2/bin/xml2-config --with-xml2-dir=/usr/local/opt/libxml2 --with-xml2-lib=/usr/local/opt/libxml2/lib --with-xml2-include=/usr/local/opt/libxml2/include

Answer 4

Just happened today.

$ brew link --force libxml2
Warning: Refusing to link macOS-provided software: libxml2
...

At first, I wasn't aware that there's a warning and it doesn't work anymore. Then found this workaround and it worked for me.

bundle config build.libxml-ruby --use-system-libraries=true --with-xml2-include=/usr/local/opt/libxml2/include/libxml2/

Answer 5

I manage to fix this with the help of a colleague, if anybody else encounter this problem:

gem install libxml-ruby -v '2.9.0' -- --use-system-libraries --with-xml2-dir=/usr/local/Cellar/libxml2/2.9.8/include/libxml2/libxml/ --with-xml2-config=/usr/bin/xml2-config

Replace '2.9.0' with the libxml version that you need!