[Bug 219418] textproc/rubygem-nokogiri: fails to build with elfutils installed

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=219418

            Bug ID: 219418
           Summary: textproc/rubygem-nokogiri: fails to build with
                    elfutils installed
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: ruby at FreeBSD.org
          Reporter: lantw44 at gmail.com
             Flags: maintainer-feedback?(ruby at FreeBSD.org)
          Assignee: ruby at FreeBSD.org

devel/elfutils port installs a shared library called libelf.so.1, causing the
linker to print warnings when linking test programs.

/usr/bin/ld: warning: libelf.so.2, needed by /usr/local/lib/libruby23.so, may
conflict with libelf.so.1


This causes pkg_config function call in ext/nokogiri/extconf.rb to return nil,
so it fallbacks to rubygem-pkg-config. However, the rubygem-pkg-config 1.2.0
provided by ports cannot pass the version check.

gem 'pkg-config', (gem_ver='~> 1.1.7')


===>  Building for rubygem-nokogiri-1.7.2
  Successfully built RubyGem
  Name: nokogiri
  Version: 1.7.2
  File: nokogiri-1.7.2.gem
===>  Staging for rubygem-nokogiri-1.7.2
===>   rubygem-nokogiri-1.7.2 depends on package: rubygem-pkg-config>=1.1.7 -
found
===>   rubygem-nokogiri-1.7.2 depends on file: /usr/local/bin/ruby23 - found
===>   rubygem-nokogiri-1.7.2 depends on file: /usr/local/bin/gem23 - found
===>   Generating temporary packing list
(cd /wrkdirs/usr/ports/textproc/rubygem-nokogiri/work/nokogiri-1.7.2;
/usr/bin/env RB_USER_INSTALL=yes LANG=en_US.UTF-8 LC_ALL=en_US.UTF-8
/usr/local/bin/gem23 install -l --no-update-sources --install-dir
/wrkdirs/usr/ports/textproc/rubygem-nokogiri/work/stage/usr/local/lib/ruby/gems/2.3
--ignore-dependencies
--bindir=/wrkdirs/usr/ports/textproc/rubygem-nokogiri/work/stage/usr/local/bin
--rdoc --ri nokogiri-1.7.2.gem -- --build-args --use-system-libraries)
Building native extensions with: '--build-args --use-system-libraries'
This could take a while...
ERROR:  Error installing nokogiri-1.7.2.gem:
        ERROR: Failed to build gem native extension.

    current directory:
/wrkdirs/usr/ports/textproc/rubygem-nokogiri/work/stage/usr/local/lib/ruby/gems/2.3/gems/nokogiri-1.7.2/ext/nokogiri
/usr/local/bin/ruby23 -r ./siteconf20170520-5753-1cepj95.rb extconf.rb
--build-args --use-system-libraries
checking if the C compiler accepts ... yes
Building nokogiri using system libraries.
pkg-config could not be used to find libxml-2.0
Please install either `pkg-config` or the pkg-config gem per

    gem install pkg-config -v "~> 1.1.7"

pkg-config could not be used to find libxslt
Please install either `pkg-config` or the pkg-config gem per

    gem install pkg-config -v "~> 1.1.7"

pkg-config could not be used to find libexslt
Please install either `pkg-config` or the pkg-config gem per

    gem install pkg-config -v "~> 1.1.7"

ERROR: cannot discover where libxml2 is located on your system. please make
sure `pkg-config` is installed.
*** 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
        --without-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=/usr/local/bin/$(RUBY_BASE_NAME)23
        --help
        --clean
        --use-system-libraries
        --with-zlib-dir
        --without-zlib-dir
        --with-zlib-include
        --without-zlib-include=${zlib-dir}/include
        --with-zlib-lib
        --without-zlib-lib=${zlib-dir}/lib
        --with-xml2-dir
        --without-xml2-dir
        --with-xml2-include
        --without-xml2-include=${xml2-dir}/include
        --with-xml2-lib
        --without-xml2-lib=${xml2-dir}/lib
        --with-libxml-2.0-config
        --without-libxml-2.0-config
        --with-pkg-config
        --without-pkg-config
        --with-xslt-dir
        --without-xslt-dir
        --with-xslt-include
        --without-xslt-include=${xslt-dir}/include
        --with-xslt-lib
        --without-xslt-lib=${xslt-dir}/lib
        --with-libxslt-config
        --without-libxslt-config
        --with-exslt-dir
        --without-exslt-dir
        --with-exslt-include
        --without-exslt-include=${exslt-dir}/include
        --with-exslt-lib
        --without-exslt-lib=${exslt-dir}/lib
        --with-libexslt-config
        --without-libexslt-config

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

 
/wrkdirs/usr/ports/textproc/rubygem-nokogiri/work/stage/usr/local/lib/ruby/gems/2.3/extensions/amd64-freebsd-11/2.3/nokogiri-1.7.2/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in
/wrkdirs/usr/ports/textproc/rubygem-nokogiri/work/stage/usr/local/lib/ruby/gems/2.3/gems/nokogiri-1.7.2
for inspection.
Results logged to
/wrkdirs/usr/ports/textproc/rubygem-nokogiri/work/stage/usr/local/lib/ruby/gems/2.3/extensions/amd64-freebsd-11/2.3/nokogiri-1.7.2/gem_make.out
*** Error code 1

Stop.
make: stopped in /usr/ports/textproc/rubygem-nokogiri

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