[SOLVED] Unable To Install the GEM (install nokogiri manually to solve the issue)

[ahmadawais]

I have been looking forward to using GitReflow and today I ended up installing it. I think I had some issues which are listed below since the gem was not installed. Can you guide me how to get it done?

sudo gem install git_reflow
Password:
Fetching: simple_oauth-0.3.1.gem (100%)
Successfully installed simple_oauth-0.3.1
Fetching: mini_portile2-2.0.0.gem (100%)
Successfully installed mini_portile2-2.0.0
Fetching: nokogiri-1.6.7.2.gem (100%)
Building native extensions.  This could take a while...
ERROR:  Error installing git_reflow:
    ERROR: Failed to build gem native extension.

    current directory: /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/ext/nokogiri
/usr/local/opt/ruby/bin/ruby -r ./siteconf20160527-22094-1ttq2lr.rb extconf.rb
checking if the C compiler accepts ... yes
checking if the C compiler accepts -Wno-error=unused-command-line-argument-hard-error-in-future... no
Building nokogiri using packaged libraries.
Using mini_portile version 2.0.0
checking for iconv.h... yes
checking for gzdopen() in -lz... yes
checking for iconv using --with-opt-* flags... yes
************************************************************************
IMPORTANT NOTICE:

Building Nokogiri with a packaged version of libxml2-2.9.2
with the following patches applied:
    - 0001-Revert-Missing-initialization-for-the-catalog-module.patch
    - 0002-Fix-missing-entities-after-CVE-2014-3660-fix.patch
    - 0003-Stop-parsing-on-entities-boundaries-errors.patch
    - 0004-Cleanup-conditional-section-error-handling.patch
    - 0005-CVE-2015-1819-Enforce-the-reader-to-run-in-constant-.patch
    - 0006-Another-variation-of-overflow-in-Conditional-section.patch
    - 0007-Fix-an-error-in-previous-Conditional-section-patch.patch
    - 0008-CVE-2015-8035-Fix-XZ-compression-support-loop.patch
    - 0009-Updated-config.guess.patch
    - 0010-Fix-parsering-short-unclosed-comment-uninitialized-access.patch
    - 0011-Avoid-extra-processing-of-MarkupDecl-when-EOF.patch
    - 0012-Avoid-processing-entities-after-encoding-conversion-.patch
    - 0013-CVE-2015-7497-Avoid-an-heap-buffer-overflow-in-xmlDi.patch
    - 0014-CVE-2015-5312-Another-entity-expansion-issue.patch
    - 0015-Add-xmlHaltParser-to-stop-the-parser.patch
    - 0016-Detect-incoherency-on-GROW.patch
    - 0017-CVE-2015-7500-Fix-memory-access-error-due-to-incorre.patch
    - 0018-CVE-2015-8242-Buffer-overead-with-HTML-parser-in-pus.patch
    - 0019-Do-not-print-error-context-when-there-is-none.patch
    - 0020-xmlStopParser-reset-errNo.patch
    - 0021-Reuse-xmlHaltParser-where-it-makes-sense.patch

Team Nokogiri will keep on doing their best to provide security
updates in a timely manner, but if this is a concern for you and want
to use the system library instead; abort this installation process and
reinstall nokogiri as follows:

    gem install nokogiri -- --use-system-libraries
        [--with-xml2-config=/path/to/xml2-config]
        [--with-xslt-config=/path/to/xslt-config]

If you are using Bundler, tell it to use the option:

    bundle config build.nokogiri --use-system-libraries
    bundle install

Note, however, that nokogiri is not fully compatible with arbitrary
versions of libxml2 provided by OS/package vendors.
************************************************************************
Extracting libxml2-2.9.2.tar.gz into tmp/x86_64-apple-darwin15.4.0/ports/libxml2/2.9.2... OK
Running git apply with /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/patches/libxml2/0001-Revert-Missing-initialization-for-the-catalog-module.patch... OK
Running git apply with /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/patches/libxml2/0002-Fix-missing-entities-after-CVE-2014-3660-fix.patch... OK
Running git apply with /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/patches/libxml2/0003-Stop-parsing-on-entities-boundaries-errors.patch... OK
Running git apply with /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/patches/libxml2/0004-Cleanup-conditional-section-error-handling.patch... OK
Running git apply with /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/patches/libxml2/0005-CVE-2015-1819-Enforce-the-reader-to-run-in-constant-.patch... OK
Running git apply with /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/patches/libxml2/0006-Another-variation-of-overflow-in-Conditional-section.patch... OK
Running git apply with /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/patches/libxml2/0007-Fix-an-error-in-previous-Conditional-section-patch.patch... OK
Running git apply with /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/patches/libxml2/0008-CVE-2015-8035-Fix-XZ-compression-support-loop.patch... OK
Running git apply with /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/patches/libxml2/0009-Updated-config.guess.patch... OK
Running git apply with /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/patches/libxml2/0010-Fix-parsering-short-unclosed-comment-uninitialized-access.patch... OK
Running git apply with /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/patches/libxml2/0011-Avoid-extra-processing-of-MarkupDecl-when-EOF.patch... OK
Running git apply with /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/patches/libxml2/0012-Avoid-processing-entities-after-encoding-conversion-.patch... OK
Running git apply with /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/patches/libxml2/0013-CVE-2015-7497-Avoid-an-heap-buffer-overflow-in-xmlDi.patch... OK
Running git apply with /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/patches/libxml2/0014-CVE-2015-5312-Another-entity-expansion-issue.patch... OK
Running git apply with /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/patches/libxml2/0015-Add-xmlHaltParser-to-stop-the-parser.patch... OK
Running git apply with /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/patches/libxml2/0016-Detect-incoherency-on-GROW.patch... OK
Running git apply with /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/patches/libxml2/0017-CVE-2015-7500-Fix-memory-access-error-due-to-incorre.patch... OK
Running git apply with /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/patches/libxml2/0018-CVE-2015-8242-Buffer-overead-with-HTML-parser-in-pus.patch... OK
Running git apply with /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/patches/libxml2/0019-Do-not-print-error-context-when-there-is-none.patch... OK
Running git apply with /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/patches/libxml2/0020-xmlStopParser-reset-errNo.patch... OK
Running git apply with /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/patches/libxml2/0021-Reuse-xmlHaltParser-where-it-makes-sense.patch... OK
Running 'configure' for libxml2 2.9.2... ERROR, review '/usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/ext/nokogiri/tmp/x86_64-apple-darwin15.4.0/ports/libxml2/2.9.2/configure.log' to see what happened. Last lines are:
========================================================================
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,  char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
Disabling ICU 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
checking that generated files are newer than configure... done
configure: creating ./config.status
sed: 1: "s/.*%!_!# !%!_!#  _%!_! ...": unterminated substitute pattern
configure: error: could not make ./config.status
========================================================================
*** 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=/usr/local/Cellar/ruby/2.3.1/bin/$(RUBY_BASE_NAME)
    --help
    --clean
    --use-system-libraries
    --enable-static
    --disable-static
    --with-zlib-dir
    --without-zlib-dir
    --with-zlib-include
    --without-zlib-include=${zlib-dir}/include
    --with-zlib-lib
    --without-zlib-lib=${zlib-dir}/lib
    --enable-cross-build
    --disable-cross-build
/usr/local/lib/ruby/gems/2.3.0/gems/mini_portile2-2.0.0/lib/mini_portile2/mini_portile.rb:366:in `block in execute': Failed to complete configure task (RuntimeError)
    from /usr/local/lib/ruby/gems/2.3.0/gems/mini_portile2-2.0.0/lib/mini_portile2/mini_portile.rb:337:in `chdir'
    from /usr/local/lib/ruby/gems/2.3.0/gems/mini_portile2-2.0.0/lib/mini_portile2/mini_portile.rb:337:in `execute'
    from /usr/local/lib/ruby/gems/2.3.0/gems/mini_portile2-2.0.0/lib/mini_portile2/mini_portile.rb:106:in `configure'
    from /usr/local/lib/ruby/gems/2.3.0/gems/mini_portile2-2.0.0/lib/mini_portile2/mini_portile.rb:149:in `cook'
    from extconf.rb:289:in `block (2 levels) in process_recipe'
    from extconf.rb:182:in `block in chdir_for_build'
    from extconf.rb:181:in `chdir'
    from extconf.rb:181:in `chdir_for_build'
    from extconf.rb:288:in `block in process_recipe'
    from extconf.rb:187:in `tap'
    from extconf.rb:187:in `process_recipe'
    from extconf.rb:478:in `<main>'

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

  /usr/local/lib/ruby/gems/2.3.0/extensions/x86_64-darwin-15/2.3.0/nokogiri-1.6.7.2/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2 for inspection.
Results logged to /usr/local/lib/ruby/gems/2.3.0/extensions/x86_64-darwin-15/2.3.0/nokogiri-1.6.7.2/gem_make.out
 ✘ ✝  ~  git reflow setup
WARNING: You called a Git command named 'reflow', which does not exist.
Continuing under the assumption that you meant 'reflog'
in 0.1 seconds automatically...
fatal: Not a git repository (or any of the parent directories): .git
 ✘ ✝  ~ 

[codenamev]

I'd try to install nokogiri manually using either

gem install nokogiri -- --use-system-libraries

or

gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include/libxml2 --use-system-libraries

If neither of those work, make sure your xcode is up to date and you have developer tools installed. Then I'd use homebrew to install the dependencies and update bundler to use those libraries by default.

[ahmadawais]

@codenamev Thanks for the help. Here's what I tried.

First of all I tried.

gem install nokogiri -- --use-system-libraries

And it gave me the following error

sudo gem install nokogiri -- --use-system-libraries
Password:
Building native extensions with: '--use-system-libraries'
This could take a while...
ERROR:  Error installing nokogiri:
    ERROR: Failed to build gem native extension.

    current directory: /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2/ext/nokogiri
/usr/local/opt/ruby/bin/ruby -r ./siteconf20160528-27156-1tj6om9.rb extconf.rb --use-system-libraries
checking if the C compiler accepts ... yes
checking if the C compiler accepts -Wno-error=unused-command-line-argument-hard-error-in-future... no
Building nokogiri using system libraries.
libxml2 version 2.6.21 or later is required!
*** 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=/usr/local/Cellar/ruby/2.3.1/bin/$(RUBY_BASE_NAME)
    --help
    --clean
    --use-system-libraries
    --with-zlib-dir
    --without-zlib-dir
    --with-zlib-include
    --without-zlib-include=${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=${xslt-dir}/lib
    --with-libxslt-config
    --without-libxslt-config
    --with-pkg-config
    --without-pkg-config
    --with-exslt-dir
    --without-exslt-dir
    --with-exslt-include
    --without-exslt-include=${exslt-dir}/include
    --with-exslt-lib
    --without-exslt-lib=${exslt-dir}/lib
    --with-libexslt-config
    --without-libexslt-config
    --with-pkg-config
    --without-pkg-config

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

  /usr/local/lib/ruby/gems/2.3.0/extensions/x86_64-darwin-15/2.3.0/nokogiri-1.6.7.2/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /usr/local/lib/ruby/gems/2.3.0/gems/nokogiri-1.6.7.2 for inspection.
Results logged to /usr/local/lib/ruby/gems/2.3.0/extensions/x86_64-darwin-15/2.3.0/nokogiri-1.6.7.2/gem_make.out

Then I tried

and it seems that it went all OK and the GEM was installed.

sudo gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include/libxml2 --use-system-libraries
Building native extensions with: '--with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include/libxml2 --use-system-libraries'
This could take a while...
Successfully installed nokogiri-1.6.7.2
Parsing documentation for nokogiri-1.6.7.2
Installing ri documentation for nokogiri-1.6.7.2
Done installing documentation for nokogiri after 4 seconds
1 gem installed

And after that I ran the original command and it installed everything as it was supposed to.

sudo gem install git_reflow
Fetching: multi_json-1.12.1.gem (100%)
Successfully installed multi_json-1.12.1
Fetching: hashie-3.4.4.gem (100%)
Successfully installed hashie-3.4.4
Fetching: multipart-post-2.0.0.gem (100%)
Successfully installed multipart-post-2.0.0
Fetching: faraday-0.9.2.gem (100%)
Successfully installed faraday-0.9.2
Fetching: faraday_middleware-0.9.2.gem (100%)
Successfully installed faraday_middleware-0.9.2
Fetching: reenhanced_bitbucket_api-0.3.2.gem (100%)
Successfully installed reenhanced_bitbucket_api-0.3.2
Fetching: httpclient-2.8.0.gem (100%)
Successfully installed httpclient-2.8.0
Fetching: highline-1.7.8.gem (100%)
Successfully installed highline-1.7.8
Fetching: gli-2.14.0.gem (100%)
Successfully installed gli-2.14.0
Fetching: rack-1.6.4.gem (100%)
Successfully installed rack-1.6.4
Fetching: multi_xml-0.5.5.gem (100%)
Successfully installed multi_xml-0.5.5
Fetching: jwt-1.5.1.gem (100%)
Successfully installed jwt-1.5.1
Fetching: oauth2-1.1.0.gem (100%)
Successfully installed oauth2-1.1.0
Fetching: thread_safe-0.3.5.gem (100%)
Successfully installed thread_safe-0.3.5
Fetching: descendants_tracker-0.0.4.gem (100%)
Successfully installed descendants_tracker-0.0.4
Fetching: addressable-2.4.0.gem (100%)
Successfully installed addressable-2.4.0
Fetching: github_api-0.14.0.gem (100%)
Successfully installed github_api-0.14.0
Fetching: colorize-0.7.7.gem (100%)
Successfully installed colorize-0.7.7
Fetching: git_reflow-0.8.1.gem (100%)
You need to setup your GitHub OAuth token
Please run 'git-reflow setup'
Successfully installed git_reflow-0.8.1
Parsing documentation for multi_json-1.12.1
Installing ri documentation for multi_json-1.12.1
Parsing documentation for hashie-3.4.4
Installing ri documentation for hashie-3.4.4
invalid options: -SHN
(invalid options are ignored)
Parsing documentation for multipart-post-2.0.0
Installing ri documentation for multipart-post-2.0.0
Parsing documentation for faraday-0.9.2
Installing ri documentation for faraday-0.9.2
Parsing documentation for faraday_middleware-0.9.2
Installing ri documentation for faraday_middleware-0.9.2
Parsing documentation for reenhanced_bitbucket_api-0.3.2
Installing ri documentation for reenhanced_bitbucket_api-0.3.2
Parsing documentation for httpclient-2.8.0
Installing ri documentation for httpclient-2.8.0
Parsing documentation for highline-1.7.8
Installing ri documentation for highline-1.7.8
Parsing documentation for gli-2.14.0
Installing ri documentation for gli-2.14.0
Parsing documentation for rack-1.6.4
Installing ri documentation for rack-1.6.4
Parsing documentation for multi_xml-0.5.5
Installing ri documentation for multi_xml-0.5.5
Parsing documentation for jwt-1.5.1
Installing ri documentation for jwt-1.5.1
Parsing documentation for oauth2-1.1.0
Installing ri documentation for oauth2-1.1.0
Parsing documentation for thread_safe-0.3.5
Installing ri documentation for thread_safe-0.3.5
Parsing documentation for descendants_tracker-0.0.4
Installing ri documentation for descendants_tracker-0.0.4
Parsing documentation for addressable-2.4.0
Installing ri documentation for addressable-2.4.0
Parsing documentation for github_api-0.14.0
Installing ri documentation for github_api-0.14.0
Parsing documentation for colorize-0.7.7
Installing ri documentation for colorize-0.7.7
invalid options: -ri
(invalid options are ignored)
Parsing documentation for git_reflow-0.8.1
Installing ri documentation for git_reflow-0.8.1
Done installing documentation for multi_json, hashie, multipart-post, faraday, faraday_middleware, reenhanced_bitbucket_api, httpclient, highline, gli, rack, multi_xml, jwt, oauth2, thread_safe, descendants_tracker, addressable, github_api, colorize, git_reflow after 24 seconds
19 gems installed

Thanks for the help.

[codenamev]

Fantastic! Thanks for providing feedback for anyone else running into this issue :smile:

[ahmadawais]

^ That was the intention of my last comment. I edited the issue title for it to rank at Google in case someone is searching via Google for a similar issue.

[robinstroobants]

gem uninstall nokogiri xcode-select --install gem install nokogiri

upgrade to osx sierra broke xcode cli reinstall fixed it

[complanboy2]

Thank you, @ahmadawais. It worked for me as well.

I'm on Sierra, 10.12.6

sudo gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include/libxml2 --use-system-libraries

[sebasjimenez10]

@ahmadawais Thanks for sharing. This worked for me (just updated the version of the MacOSX sdk):

sudo gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/usr/include/libxml2 --use-system-libraries

Thanks again 😄

[sgnl]

FWIW (for those coming in from a web search),

xcode-select --install would not return any information as I have installed it previously so I assumed that this step was fine but after inspecting the mkmf.log file it had a message in there that I still have to, again (because I did it before), agree to the CLI tools (im guessing because I just updated the cli tools via app store.app).

inside of mkmf.log:

Agreeing to the Xcode/iOS license requires admin privileges, please run “sudo xcodebuild -license” and then retry this command.

🤣 Thanks OS X

after which I was able to install successfully.

[alexandesigner]

@codenamev Thanks!

For me it turned out cool, I just had to change the path to SDK of XCODE which in my case I use 10.12

$ gem install nokogiri - --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms / MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/libxml2 --use-system-libraries

[FeeiCN]

sudo gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/usr/include/libxml2 --use-system-libraries

[ghost]

@ahmadawais Thank you very much!

[escapeit]

Those coming here from google after upgrading MacOS to Mojave (10.14), just changing the above paths to 10.14 didn't address the root issue. See this stack overflow answer.

Running this resolved it for me: $ sudo installer -pkg /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg -target /

[jaswinder97]

I have to kill all bundler services to make it work for bundle install only without manually installing nokogiri. Sometimes activesupport depends on nokogiri and it could be broken with existing symlinks

[mrcnk]

For Mojave this one also works (remember to change the SDK version):

gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/include/libxml2 --use-system-libraries

[mehdihz]

With bundler when trying to install to vendor/bundle, I've followed this method:

bundle config build.nokogiri --use-system-libraries --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/libxml2
bundle install --path vendor/bundle

[chongfai13]

gem uninstall nokogiri xcode-select --install gem install nokogiri

upgrade to osx sierra broke xcode cli reinstall fixed it

It works for me! Thanks bro

[mactive]

sudo gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.1.sdk/usr/include/libxml2/ --use-system-libraries

[emersonxinay]

Esto funciono para mi sudo gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/usr/include/libxml2 --use-system-libraries