Installing nokogiri on OS Mavericks [duplicate] - ruby-on-rails

I upgraded my OSX (Lion) to Mavericks and I can't install Nokogiri for my projects.
I already install XCode 5.0.1, Command Line Tools (using xcode-select --install), and already installed libxml2 from Homebrew and I am still having problems.
The error is:
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/Users/ericcamalionte/.rvm/rubies/ruby-1.9.2-p320/bin/ruby extconf.rb
checking for libxml/parser.h... *** 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/ericcamalionte/.rvm/rubies/ruby-1.9.2-p320/bin/ruby
--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-iconv-dir
--without-iconv-dir
--with-iconv-include
--without-iconv-include=${iconv-dir}/include
--with-iconv-lib
--without-iconv-lib=${iconv-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-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-libxml-2.0-config
--without-libxml-2.0-config
--with-libiconv-config
--without-libiconv-config
/Users/ericcamalionte/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:368:in `try_do': The complier failed to generate an executable file. (RuntimeError)
You have to install development tools first.
from /Users/ericcamalionte/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:452:in `try_cpp'
from /Users/ericcamalionte/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:853:in `block in find_header'
from /Users/ericcamalionte/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:693:in `block in checking_for'
from /Users/ericcamalionte/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:280:in `block (2 levels) in postpone'
from /Users/ericcamalionte/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:254:in `open'
from /Users/ericcamalionte/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:280:in `block in postpone'
from /Users/ericcamalionte/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:254:in `open'
from /Users/ericcamalionte/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:276:in `postpone'
from /Users/ericcamalionte/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:692:in `checking_for'
from /Users/ericcamalionte/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/mkmf.rb:852:in `find_header'
from extconf.rb:116:in `<main>'
Gem files will remain installed in /Users/ericcamalionte/Locaweb/code/dns-panel/vendor/bundle/ruby/1.9.1/gems/nokogiri-1.5.9 for inspection.
Results logged to /Users/ericcamalionte/Locaweb/code/dns-panel/vendor/bundle/ruby/1.9.1/gems/nokogiri-1.5.9/ext/nokogiri/gem_make.out
An error occured while installing nokogiri (1.5.9), and Bundler cannot continue.
Make sure that `gem install nokogiri -v '1.5.9'` succeeds before bundling.
I installed libxml2, libxslt and libiconv from Homebrew, and set the params to install Nokogiri, but don't work too.
I can't find what's wrong in my enviroment, can you help me?

You can also install Nokogiri on Mac OS X 10.9 Mavericks with full XCode Install using:
gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/libxml2
Update
For those using Yosemite the following command will work:
gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/include/libxml2 --use-system-libraries
or, it might actually be in your MacOSX10.11.sdk folder (mine was as of 18-Sep-2015) anyways, so even if you are not yet fully up to El Capitan, I had recently updated XCode and you may need to use the El Capitan SDK path, which follows next:
Update
For those using El Capitan the following command will work:
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
Update
For those using Sierra the following command will work:
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

After navigating the animated GIFs here, all that I had to do was simply xcode-select --install and the gem install nokogiri worked fine.

I found this log and saw that gcc-4.2 was not found:
package configuration for libxslt
cflags: -I/usr/local/Cellar/libxslt/1.1.28/include -I/usr/local/Cellar/libxml2/2.9.1/include/libxml2
ldflags: -L/usr/local/Cellar/libxslt/1.1.28/lib -L/usr/local/Cellar/libxml2/2.9.1/lib
libs: -lxslt -lxml2 -lz -lpthread -liconv -lm -lxml2
package configuration for libxml-2.0
cflags: -I/usr/local/Cellar/libxml2/2.9.1/include/libxml2
ldflags: -L/usr/local/Cellar/libxml2/2.9.1/lib
libs: -lxml2
package configuration for libiconv is not found
"/usr/bin/gcc-4.2 -o conftest -I/Users/ericcamalionte/.rvm/rubies/ruby-1.9.2-p320/include/ruby-1.9.1/x86_64-darwin11.4.0 -I/Users/ericcamalionte/.rvm/rubies/ruby-1.9.2-p320/include/ruby-1.9.1/ruby/backward -I/Users/ericcamalionte/.rvm/rubies/ruby-1.9.2-p320/include/ruby-1.9.1 -I. -I/usr/local/Cellar/libxslt/1.1.28/include -I/usr/local/Cellar/libxml2/2.9.1/include/libxml2 -I/usr/local/Cellar/libiconv/1.14/include -I/Users/ericcamalionte/.rvm/gems/ruby-1.9.2-p320#dns-panel/gems/nokogiri-1.6.0/ports/x86_64-apple-darwin13.0.0/libxml2/2.8.0/include -I/Users/ericcamalionte/.rvm/gems/ruby-1.9.2-p320#dns-panel/gems/nokogiri-1.6.0/ports/x86_64-apple-darwin13.0.0/libxslt/1.1.26/include -I/Users/ericcamalionte/.rvm/usr/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -O3 -ggdb -Wextra -Wno-unused-parameter -Wno-parentheses -Wpointer-arith -Wwrite-strings -Wno-missing-field-initializers -Wshorten-64-to-32 -Wno-long-long -fno-common -pipe -g -DXP_UNIX -O3 -Wall -Wcast-qual -Wwrite-strings -Wconversion -Wmissing-noreturn -Winline -DNOKOGIRI_USE_PACKAGED_LIBRARIES -DNOKOGIRI_LIBXML2_PATH='"/Users/ericcamalionte/.rvm/gems/ruby-1.9.2-p320#dns-panel/gems/nokogiri-1.6.0/ports/x86_64-apple-darwin13.0.0/libxml2/2.8.0"' -DNOKOGIRI_LIBXSLT_PATH='"/Users/ericcamalionte/.rvm/gems/ruby-1.9.2-p320#dns-panel/gems/nokogiri-1.6.0/ports/x86_64-apple-darwin13.0.0/libxslt/1.1.26"' -I/usr/local/Cellar/libxslt/1.1.28/include -I/usr/local/Cellar/libxml2/2.9.1/include/libxml2 -I/usr/local/Cellar/libxml2/2.9.1/include/libxml2 conftest.c -L. -L/Users/ericcamalionte/.rvm/rubies/ruby-1.9.2-p320/lib -L/usr/local/Cellar/libxslt/1.1.28/lib -L/usr/local/Cellar/libxml2/2.9.1/lib -L/usr/local/Cellar/libiconv/1.14/lib -L/Users/ericcamalionte/.rvm/gems/ruby-1.9.2-p320#dns-panel/gems/nokogiri-1.6.0/ports/x86_64-apple-darwin13.0.0/libxml2/2.8.0/lib -L/Users/ericcamalionte/.rvm/gems/ruby-1.9.2-p320#dns-panel/gems/nokogiri-1.6.0/ports/x86_64-apple-darwin13.0.0/libxslt/1.1.26/lib -L/Users/ericcamalionte/.rvm/usr/lib -L. -Wl,-rpath,/Users/ericcamalionte/.rvm/gems/ruby-1.9.2-p320#dns-panel/gems/nokogiri-1.6.0/ports/x86_64-apple-darwin13.0.0/libxml2/2.8.0/lib -Wl,-rpath,/Users/ericcamalionte/.rvm/gems/ruby-1.9.2-p320#dns-panel/gems/nokogiri-1.6.0/ports/x86_64-apple-darwin13.0.0/libxslt/1.1.26/lib -L/usr/local/Cellar/libxslt/1.1.28/lib -L/usr/local/Cellar/libxml2/2.9.1/lib -L/usr/local/Cellar/libxml2/2.9.1/lib -lxslt -lxml2 -lz -lpthread -liconv -lm -lxml2 -lxml2 -lruby.1.9.1-static -lpthread -ldl -lobjc "
sh: /usr/bin/gcc-4.2: No such file or directory
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: int main() {return 0;}
/* end */
To solve this problem I intalled apple-gcc42 using homebrew brew install apple-gcc42 and created a symlink to my /usr/bin :
sudo ln -s /usr/local/Cellar/apple-gcc42/4.2.1-5666.3/bin/gcc-4.2 /usr/bin/gcc-4.2

If you're running Xcode 5.1, the command line tools don't work for nokogiri 1.6.1. You'll need to download the Late october 2013 tools from Apple. Once you do that run
sudo xcode-select -s /Library/Developer/CommandLineTools/
to set up your machine to use the Xcode 5.0.X command line tools, then run
gem install nokogiri
If you want to reset your command line tools to the Xcode.app version afterward run
sudo xcode-select -r
Or, another thing you can do is add the flag to ignore unknown command line arguments. Then the install looks like this:
sudo ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future gem install nokogiri

This is what worked for me on OSX Mavericks:
sudo ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future gem install nokogiri -v '1.6.1' --verbose --no-ri --no-rdoc

I'm on OSX Mavericks and my problem turned out to be a bad install of Ruby.
So, I reinstalled ruby with rvm :
rvm remove ruby 2.0.0p451
rvm remove ruby-2.0.0-p451 && rvm install ruby-2.0.0-p451
I was then able to
gem install nokogiri --no-ri --no-rdoc
Problem solved.

I like to stick with system-provided stuff typically. This worked for me:
gem install nokogiri -- --with-iconv-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/ --with-iconv-lib=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/lib/

I ran into this problem immediately after installing the Mavericks 10.9.5 update and the 10.9 Developer tools update from Apple. I ran xcode-select --install, but that did not fix the problem. Then I opened XCode, accepted the eula, and quit XCode. That fixed the problem.

I had this problem today, on Maverick, this is how I ended up solving the issue:
brew update
brew install libiconv
brew link libiconv
Make sure that you know the version of libiconv in Cellar mine below was 1.14, then install as below:
gem install nokogiri -- --with-iconv-dir=/usr/local/Cellar/libiconv/1.14
If you require a particular version of nokogiri e.g -v '1.6.2.1' then install as:
gem install nokogiri -v '1.6.2.1' -- --with-iconv-dir=/usr/local/Cellar/libiconv/1.14
Nokogiri was installed successfully!

This is the same as #thomas_witt's post but works on Mac OS X Sierra:
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

To get the install to work, I had to modify the filepaths in the gem install command to match those on my system. I have different versions of libxml2 and libiconv and a slightly different file structure. The command, with my modifications, is:
gem install nokogiri -- --with-xml2-include=/usr/local/Cellar/libxml2/2.9.1/include/libxml2
--with-xml2-lib=/usr/local/Cellar/libxml2/2.9.1/lib
--with-xslt-dir=/usr/local/Cellar/libxslt/1.1.28
--with-iconv-include=/usr/local/Cellar/libiconv/1.13.1/include
--with-iconv-lib=/usr/local/Cellar/libiconv/1.13.1/lib

For people using MacPorts, make sure you have installed libxml2 via MacPorts. Then type:
bundle config build.nokogiri --use-system-libraries
bundle install
This should do the trick, worked for me without using full paths.

Use brew install libxml2 libxslt if you use Homebrew.

Here is another reference:
system: OS X Yosemite 10.10
rvm: 1.26.10
brew: 0.9.5
ruby: ruby 2.2.0p0 (2014-12-25 revision 49005) [x86_64-darwin14]
I got error while installing nokogiri
error like this:
.rvm/rubies/ruby-2.2.0-p0/lib/ruby/1.9.1/mkmf.rb:368:in `try_do': The complier failed to generate an executable file. (RuntimeError)
You have to install development tools first.
then probably need:
$ xcode-select --install
or if you got error like
checking for libxml/parser.h... no
I just fix the lib path by:
gem uninstall nokogiri libxml-ruby
brew update
brew uninstall libxml2
brew install libxml2 libxslt
gem install nokogiri -- --with-xml2-include=/usr/local/Cellar/libxml2/2.9.2/include/libxml2/libxml --with-xml2-lib=/usr/local/Cellar/libxml2/2.9.2/lib --with-iconv-dir=/usr/local/Cellar/libiconv/1.14/ --with-xslt-dir=/usr/local/Cellar/libxslt/1.1.26/
for bundle need something like:
bundle config build.nokogiri --with-xml2-include=/usr/local/Cellar/libxml2/2.9.2/include/libxml2/libxml --with-xml2-lib=/usr/local/Cellar/libxml2/2.9.2/lib --with-iconv-dir=/usr/local/Cellar/libiconv/1.14/ --with-xslt-dir=/usr/local/Cellar/libxslt/1.1.26/
bundle install

This works for me
system: OS X Yosemite 10.10
rvm: 1.26.10
ruby: ruby 2.2.1
Just run below two commands
$ xcode-select --install
It will ask you to download say "yes" then it will ask to install the xcode component click install.
Now try to install gem with below command
gem install nokogiri --no-ri --no-rdoc
This works for me with above environment.

I ran into the same issue for Mavrick, and the solution was:
xcode-select --install
However, that is not working as Apple's download page for Command-line-tool does not have that installer available publically now.
So, if you want to have the command-line tools for Mavricks you need to have a paid account. Then only you will be able to install it.
Once you install it you will not face this issue with Nokogiri.

I had this same error on a fresh Mavericks install. After having a lapse of judgement I renamed my Xcode app bundle to Xcode 5.0.1.app.
Apparently the Nokogiri installation script does not quote its paths and so the space in the file name caused all sorts or troubles. It wasn't until I tried brew install libxml2 that the error became obvious.
Lesson learned: spaces in file names are evil.

In my case, I had to actually run /usr/bin/gcc-4.2 after symlinking it. You have to accept the license agreement, otherwise it hangs.

The error message gives a clue here: The compiler failed to generate an executable file. (RuntimeError)
xcode-select --install # not sure if this is required
brew install apple-gcc42
gem install nokogiri
You also might need to brew install and link these:
libxml2 libxslt

brew install libxml2 libxslt
gem install nokogiri -- \
--with-xml2-include=/usr/local/Cellar/libxml2/*/include/libxml2 \
--with-xml2-lib=/usr/local/Cellar/libxml2/*/lib \
--with-xslt-dir=/usr/local/Cellar/libxslt/*

For me the error was that that gcc (4.2.1, installed from Homebrew) was complaining that:
-E, -S, -save-temps and -M options are not allowed with multiple -arch flags
I solved the issue by forcing x86_64 only:
ARCHFLAGS="-arch x86_64" gem install nokogiri

After upgrading to Maverick, I had a similar problem. I use RVM with Ruby 1.9.2-p320, and I tried several solutions given here, but nothing solved the problem.
Then I changed to Ruby 2.1.2, and bundle install installed Nokogiri immediately.

If anyone is having this issue on el capitan, whilst using bundler.
Make sure the xcode command line tools are installed and run this:
bundle config build.nokogiri --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include/libxml2 --use-system-libraries

I was facing the same issue from past two weeks while trying to run a rails 3 version application.
The issue is that your rvm/rbenv is not using the C compiler.
Use this command for rvm to take compatible C compiler
CC=gcc rvm install-version
So if you are using Ruby 1.9.3, use it this way
CC=gcc rvm install-1.9.3
Use this command every time you are not able to bundle install or anything.
This thing is working on El Capitan, rails 3.2.16, ruby 1.9.3, mysql 5.7
Hopefully, It will resolve the issue.
I was facing the same issue from past two weeks while trying to run a rails 3 version application.
The issue is that your rvm/rbenv is not using the C compiler.
Use this command for rvm to take compatible C compiler
CC=gcc rvm install-version
So if you are using Ruby 1.9.3, use it this way
CC=gcc rvm install-1.9.3
Use this command every time you are not able to bundle install or anything.
This thing is working on El Capitan, rails 3.2.16, ruby 1.9.3, mysql 5.7
Hopefully, It will resolve the issue.
And also if you already have the Xcode and then also you are not getting the same errors installing any gem, try this solution.

I added my findings here after I came across this same issue shortly after an Upgrade: http://jasdeep.ca/2013/10/installing-nokogiri-fails-os-x-mavericks/
The fix simply is these 2 commands:
xcode-select --install
gem install nokogiri
Hope it helps.

I had this issue as well. Running brew doctor showed that I had an unexpected version of libiconv in /user/local/lib.
Warning: Unbrewed dylibs were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.
Unexpected dylibs:
/usr/local/lib/libcharset.1.dylib
/usr/local/lib/libiconv.2.dylib
So I removed them, and rebrewed libxml:
rm /usr/local/lib/libiconv*
andromeda:nokogiri-1.6.0 Jeff$ brew install libxml2 libxslt
...
==> Summary
🍺 /usr/local/Cellar/libxslt/1.1.28: 145 files, 3.3M, built in 36 seconds
Finally, I installed nokogiri:
Jeff$ gem install nokogiri
Building native extensions. This could take a while...
Successfully installed nokogiri-1.6.0
1 gem installed

None of these answers worked for my particular case, and since I am a newb I figured my solution might be able to help someone else.
I am using Yosemite and was using Ruby 1.9.3p547. There was a security exposure for p547 so I was trying to update to Ruby 1.9.3p550 or higher. I used RVM, then tried to migrate my gems and many of them didn't go. Then I tried to bundle install but that was failing and I thought maybe it was a conflict between the various paths and dependencies so I removed the older version of Ruby. This broke everything.
I kept getting a message saying that the C compiler was missing, even though I had downloaded XCode and recently updated the CLI tools. I found another website that told me to download a third party GCC, which I did. which made everything worse.
Now I'm getting a message saying I need to fix my profiles and PATHs or it might just be easier to reinstall OSX.
So I did.
Anyway, longer story merely long: the solution that finally worked for me was to get rid of RVM and just use brew to download the Ruby version I wanted then before running bundle install. Install the correct version of Nokogiri FIRST.
brew install ruby193
sudo gem install nokogiri -v '1.6.0'
bundle install

for windows you can also try local installation:
download the appropriate gem based on your environment.
go to the directory where you saved the gem file.
gem install --local nokogiri-1.6.3.1-x86-mingw32.gem
if not worked you may check if you have zlib and mingw or proper c compiler installed.

Every single darn thing on here didn't do it for me (I didn't get into brew reinstalls, oy), but this finally did (found via a bug report on some unrelated project):
gem install nokogiri -- --use-system-libraries=true --with-xml2-include=/usr/include/libxml2
Good luck. Yay for #yakshaving!

Check your Commandline tools version. Set up your machine to use the Xcode 5.0.X command line tools, then run:
gem install nokogiri

Related

nokogiri gem installation error

I know there are a lot of questions about this gem but no answer has worked for me.
When I run in SSH gem install nokogiri I get this error:
Extracting libxml2-2.8.0.tar.gz into tmp/x86_64-unknown-linux-gnu/ports/libxml2/2.8.0... OK
Running patch with /home/user58952277/.gem/ruby/1.9.3/gems/nokogiri-1.6.2.1/ports/patches/libxml2/0001-Fix-parser-local-buffers-size-problems.patch...
Running 'patch' for libxml2 2.8.0... ERROR, review 'tmp/x86_64-unknown-linux-gnu/ports/libxml2/2.8.0/patch.log' to see what happened.
*** 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.
My host told me that all libs are installed.
Here are the full logs after executing the install nokogiri command:
Building native extensions. This could take a while...
Building nokogiri using packaged libraries.
Building libxml2-2.8.0 for nokogiri with the following patches applied:
- 0001-Fix-parser-local-buffers-size-problems.patch
- 0002-Fix-entities-local-buffers-size-problems.patch
- 0003-Fix-an-error-in-previous-commit.patch
- 0004-Fix-potential-out-of-bound-access.patch
- 0005-Detect-excessive-entities-expansion-upon-replacement.patch
- 0006-Do-not-fetch-external-parsed-entities.patch
- 0007-Enforce-XML_PARSER_EOF-state-handling-through-the-pa.patch
- 0008-Improve-handling-of-xmlStopParser.patch
- 0009-Fix-a-couple-of-return-without-value.patch
- 0010-Keep-non-significant-blanks-node-in-HTML-parser.patch
- 0011-Do-not-fetch-external-parameter-entities.patch
************************************************************************
IMPORTANT! Nokogiri builds and uses a packaged version of libxml2.
If this is a concern for you and you want to use the system library
instead, abort this installation process and reinstall nokogiri as
follows:
gem install nokogiri -- --use-system-libraries
If you are using Bundler, tell it to use the option:
bundle config build.nokogiri --use-system-libraries
bundle install
However, note that nokogiri does not necessarily support all versions
of libxml2.
For example, libxml2-2.9.0 and higher are currently known to be broken
and thus unsupported by nokogiri, due to compatibility problems and
XPath optimization bugs.
************************************************************************
ERROR: Error installing nokogiri:
ERROR: Failed to build gem native extension.
/opt/rubies/ruby-1.9.3/bin/ruby extconf.rb
Building nokogiri using packaged libraries.
checking for iconv.h... yes
checking for iconv_open() in iconv.h... yes
Building libxml2-2.8.0 for nokogiri with the following patches applied:
- 0001-Fix-parser-local-buffers-size-problems.patch
- 0002-Fix-entities-local-buffers-size-problems.patch
- 0003-Fix-an-error-in-previous-commit.patch
- 0004-Fix-potential-out-of-bound-access.patch
- 0005-Detect-excessive-entities-expansion-upon-replacement.patch
- 0006-Do-not-fetch-external-parsed-entities.patch
- 0007-Enforce-XML_PARSER_EOF-state-handling-through-the-pa.patch
- 0008-Improve-handling-of-xmlStopParser.patch
- 0009-Fix-a-couple-of-return-without-value.patch
- 0010-Keep-non-significant-blanks-node-in-HTML-parser.patch
- 0011-Do-not-fetch-external-parameter-entities.patch
************************************************************************
IMPORTANT! Nokogiri builds and uses a packaged version of libxml2.
If this is a concern for you and you want to use the system library
instead, abort this installation process and reinstall nokogiri as
follows:
gem install nokogiri -- --use-system-libraries
If you are using Bundler, tell it to use the option:
bundle config build.nokogiri --use-system-libraries
bundle install
However, note that nokogiri does not necessarily support all versions
of libxml2.
For example, libxml2-2.9.0 and higher are currently known to be broken
and thus unsupported by nokogiri, due to compatibility problems and
XPath optimization bugs.
************************************************************************
Extracting libxml2-2.8.0.tar.gz into tmp/x86_64-unknown-linux-gnu/ports/libxml2/2.8.0... OK
Running patch with /home/user58952277/.gem/ruby/1.9.3/gems/nokogiri-1.6.2.1/ports/patches/libxml2/0001-Fix-parser-local-buffers-size-problems.patch...
Running 'patch' for libxml2 2.8.0... ERROR, review 'tmp/x86_64-unknown-linux-gnu/ports/libxml2/2.8.0/patch.log' to see what happened.
*** 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=/opt/rubies/ruby-1.9.3/bin/ruby
--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
/home/user58952277/.gem/ruby/1.9.3/gems/mini_portile-0.6.0/lib/mini_portile.rb:279:in `block in execute': Failed to complete patch task (RuntimeError)
from /home/user58952277/.gem/ruby/1.9.3/gems/mini_portile-0.6.0/lib/mini_portile.rb:271:in `chdir'
from /home/user58952277/.gem/ruby/1.9.3/gems/mini_portile-0.6.0/lib/mini_portile.rb:271:in `execute'
from extconf.rb:282:in `block in patch'
from extconf.rb:279:in `each'
from extconf.rb:279:in `patch'
from /home/user58952277/.gem/ruby/1.9.3/gems/mini_portile-0.6.0/lib/mini_portile.rb:108:in `cook'
from extconf.rb:253:in `block in process_recipe'
from extconf.rb:154:in `tap'
from extconf.rb:154:in `process_recipe'
from extconf.rb:419:in `<main>'
2020 April 6th Update:
macOS Catalina 10.15
gem install nokogiri -- --use-system-libraries=true --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/libxml2/
macOS Mojave 10.14
gem install nokogiri -- --use-system-libraries=true --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/include/libxml2/
macOS High Sierra 10.13
gem install nokogiri -- --use-system-libraries=true --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/usr/include/libxml2/
macOS Sierra 10.12:
gem install nokogiri -- --use-system-libraries=true --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/libxml2/
OS X El Capitan 10.11
gem install nokogiri -- --use-system-libraries=true --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include/libxml2/
Consider to add sudo if you don't have permission.
For some reason Apple’s Yosemite version of OSX does not have a system accessible installation of libxml2. Nokogiri requires this in order to compile and luckily Xcode has a version of libxml2 bundled with it — we just need to specify it when installing the gem. It’s important to get Nokogiri installed correctly because as of right now Rails 4.2.1.rc4 automatically attempts to install it and you will feel pain.
Checkout this post for more info.
Finally, the problem was caused by nokogiri itself by shipping it's own libxml2 that's incompatible with some systems.
So to install nokogiri I had to tell it that it should use the system libraries.
I installed it manually by:
gem install nokogiri -v 1.6.2.1 -- --use-system-libraries
And it worked well. Other answers didn't solve it.
I ran into this same problem, because of an unlisted build dependency. When I found the tmp directory in question:
find ~/.rbenv/ -name patch.log
It said:
sh: patch: command not found
Fixed that with a simple:
sudo yum install -y patch
On OSX Yosemite, I did xcode-select --install in a terminal. After which, bundle worked fine with that gem.
This works for me in Windows 7 Home Basic 64 Bit:
gem install nokogiri -v 1.6.2.1 -- --use-system-libraries
Nothing in current answers worked for me (I use Ubuntu 16.04, not Mac).
However, by following the instructions in Nokogiri site and this part did the trick:
# See http://www.nokogiri.org/tutorials/installing_nokogiri.html#ubuntu___debian
sudo apt-get install build-essential patch
sudo apt-get install ruby-dev zlib1g-dev liblzma-dev
Note I've been using Nokogiri since 2009 and I've always had trouble installing it. Any further comment would probably not comply with SO T&Cs :)
This worked for me with OS X Yosemite.
gem install nokogiri -v 1.6.5 -- --use-system-libraries
Installing Nokogiri in Mac OS El Capitan:
brew install libxml2
bundle config build.nokogiri "--use-system-libraries --with-xml2-include=/usr/local/opt/libxml2/include/libxml2"
bundle install
It working for me :)
Nokogiri didn't find Xcode libs on my OSX Sierra machine until I ran:
sudo xcodebuild -license accept
This is what worked for me on OS X 10.10.3 Yosemite:
sudo gem install nokogiri -- --use-system-libraries --with-xslt-dir=/usr/local/opt/libxslt --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/include/libxml2 --with-xml2-lib=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/lib
Just Like wongzigii says the install command works with those flags with macOS Sierra
gem install nokogiri -- --use-system-libraries=true --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/libxml2/
I figured this out the hard way and took a few hours to follow the breadcrumbs and read up on what people were trying out. Nothing helped. Everything on this overflow page just didn't help so here's how I fixed this:
If you use your machine for other development projects that aren't in ruby. You might want to check package manager installations for other languages. More importantly - you might want to check for other c compiler installations - namely clang
In my case - I had installed anaconda/conda(python) and this replaced a bunch of paths in my .bash_profile to use clang as the main c compiler where as xcode command line tools and rebenv were all using gcc installed through Homebrew earlier.
I removed anaconda(using anaconda-clean) and the clang installation and then tried to bundle. That's when I got the missing libxml2 issue. I then REINSTALLED libxml2 through homebrew to ensure the symlinks would be redone through homebrew and followed the instructions that followed to add the appropriate export flags to my ~/bash_profile file.
Successfully bundles now. The reason is, the gems are now being bundled with the same compiler as the ruby version I am using for that project.
Docker would have made this a non issue for a polyglot dev machine like many of us I assume.
So heads up.
This worked for me:
sudo gem install nokogiri -v 'versionNumber' -- --use-system-libraries --with-xslt-dir=/usr/local/opt/libxslt --with-xml2-include=/Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include/libxml2 --with-xml2-lib=/Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/lib
step 1:
brew install libxml2
Step 2:
bundle config build.nokogiri --use-system-libraries
Step 3:
then try
bundle install
Finally after much struggle the following worked for me (OS X 10.8.5, macports). (I am installing github pages i.e. jekyll)
/opt/local/bin/gem install nokogiri -v 1.6.6.2 -- --use-system-libraries --with-xslt-dir=/usr/local/opt/libxslt --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/usr/include/libxml2 --with-xml2-lib=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/usr/lib
In my case, I am using Mac OSX Mojave and had to install a package described here: https://developer.apple.com/documentation/xcode_release_notes/xcode_10_release_notes#3035624
Here is the path to the package:
/Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg
After installing it, the installation finished without problems.
If using bundler, run this command first:
bundle config build.nokogiri --use-system-libraries
Am using macOS Sierra.
Went to nokogiri documentation and followed this:
ON MAC OSX
Installation should Just Work™ using Nokogiri’s vendored libxml2 and libxslt.
First, make sure you have the latest version of RubyGems and xcode commandline tools:
1 gem update --system
2 xcode-select --install
Then install nokogiri:
1 gem install nokogiri

Nokogiri 'Failed to build gem native extension' when I run bundle install

I'm running bundle install and I'm getting this error:
Building nokogiri using system libraries.
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb --use-system-libraries
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
--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=/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby
--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
extconf failed, exit code 1
Gem files will remain installed in /Users/myuser/projectpath/vendor/bundle/ruby/2.0.0/gems/nokogiri-1.6.2.rc2 for inspection.
Results logged to /Users/myuser/projectpath/vendor/bundle/ruby/2.0.0/extensions/universal-darwin-13/2.0.0/nokogiri-1.6.2.rc2/gem_make.out
An error occurred while installing nokogiri (1.6.2.rc2), and Bundler cannot continue.
Make sure that `gem install nokogiri -v '1.6.2.rc2'` succeeds before bundling.
Any ideas what could this be?
EDIT:
I also have installed nokogiri following the instructions in the tutorial, and the weird thing is that the gem was successfully installed. When I run gem list, I have nokogiri (1.6.2.1), but when running bundle install it displays the error.
Previous advises didn't help me, here is the solution for OS 10.9:
brew install libxml2
bundle config build.nokogiri "--use-system-libraries --with-xml2-include=/usr/local/opt/libxml2/include/libxml2"
bundle install
On Mavericks this workaround worked for me:
gem install nokogiri -- --use-system-libraries=true --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/libxml2
See: https://github.com/sparklemotion/nokogiri/issues/1099#issuecomment-43023208
On Amazon Linux, I had to install these two devel libraries, and then specify the include path for libxml2
$ yum install libxml2-devel libxslt-devel
$ gem install nokogiri -- --use-system-libraries=true --with-xml2-include=/usr/include/libxml2/
I also had some problems installing nokogiri, Than I installed following packages, It worked for me:
libxslt-dev
libxml2-dev
libruby1.8
libreadline-ruby1.8
libopenssl-ruby
libxml2
I am not sure, which one was exactly needed.
http://nokogiri.org/tutorials/installing_nokogiri.html. Refer to this link and install the dependencies required for nokogiri. Then run this
bundle config build.nokogiri --use-system-libraries
bundle install
On Yosemite 10.10.1, this step did not help (may be it works for others)
gem install nokogiri -- --use-system-libraries
Basically issue on my local was due to libxml2, so following workaround did the trick
bundle config build.nokogiri "--use-system-libraries --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/include/libxml2
bundle install
This worked for OS X El Capitan:
brew install libxml2 libxslt libiconv
After running the'brew install libxml2 libxslt libiconv ' You may find, that they are already installed. No worries, it never hurts to double check.
sudo gem install nokogiri -v '1.6.7' -- --use-system-libraries --with-xml2-include=/usr/include/libxml2 --with-xml2-lib=/usr/lib
bundle install
Change the version of nokogiri, if needed. e.g.
sudo gem install nokogiri -v '1.6.5' -- --use-system-libraries --with-xml2-include=/usr/include/libxml2 --with-xml2-lib=/usr/lib
For mac, the reason why it failed is that you didn't have latest Xcode Developer Tools. Nokogiri has already been packaged with libxml2. For the lack of latest Xcode Developer Tools, it can't build native extensions.
To update Xcode Developer Tools using:
xcode-select --install
And then:
gem install nokogiri
If you fix it by using
gem install nokogiri -- --use-system-libraries
may get a similar warning later:
WARNING: Nokogiri was built against LibXML version 2.9.3, but has dynamically loaded 2.9.0
The error states that your libxml2 system library is out of date. You need version 2.6.21 or later.
On my Debian/ubuntu system, nokogiri compiles for me, and I can see I have version 2.9.1
dpkg -l | grep libxml2-dev
ii libxml2-dev:amd64 2.9.1+dfsg1-3 amd64 Development files for the GNOME XML library
You have three options here.
Check if your OS package manager provides a newer version of libxml2
library
Download the latest libxml2 source code, compile and install
it
Manually specify an older version of nokogiri in your Gemfile
that works with older libxml2 library. The nokogiri changelog shows that you won't have this problem with nokogiri version 1.4.7 (although using an older
version can expose you to security issues)
For solution #3, you would put this in your gemfile:
gem 'nokogiri', '1.4.7'
On Yosemite 10.10 the following steps solved my issues completely:
sudo xcode-select -switch /Library/Developer/CommandLineTools
gem uninstall nokogiri libxml-ruby
gem install nokogiri
This thread on GitHub gave me the trick I needed get Nokogiri 1.6.2 to install:
My ~/.gitconfig had the setting autocrlf = input. When I remove this setting the nokogiri build succeeds.
On Yosemite 10.10 this workaround worked for me:
gem install nokogiri -- --use-system-libraries
For #CentOS I needed to do the following:
gem update --system
yum install libxml2-devel libxslt-devel ruby-devel
gem install nokogiri -- --use-system-libraries
This is an old thread, but I hit similar issues, and the solution in my case was quite different to those posted so far.
After some digging, I found this thread:
https://github.com/bundler/bundler/issues/2648#issuecomment-25124800
It talks about bundler using a different version of ruby to that used by gem.
From OP's paste, we can see bundler is using the Mac system copy of ruby:
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby
In my case I found that gem was coming from brew; which gem gave /usr/local/bin/gem which symlinks to /Cellar/ruby/2.3.3/bin/gem. My guess is that the OP's case was the same.
So, gem and bundler are not working off the same ruby installation, which explains why the OP sees this:
When I run gem list, I have nokogiri (1.6.2.1), but when running bundle install it displays the error.
In my case, I simply ran gem install bundler, which made bundler start using the brew version of ruby, and all problems disappeared.
On OSX 10.12 (Sierra) this worked for me:
gem install nokogiri -- --use-system-libraries=true --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/libxml2
I had this exact issue. I run a rails environment on a mac. After I upgraded from Yosemite to Sierra I believe thats when it started.
To fix the problem I just had to install xcode command line tools. I don't know if the Sierra upgrade removed them or what.
xcode-select --install
(this will install the xcode command line tools)
Also another symptom..things like git status won't work. After this i was able to do rails new appname and it was fine.
This can be fixed by installing libxml2:
brew install libxml2
bundle config build.nokogiri --use-system-libraries
bundle install
This is a problem with macOS, I tried everything above but nothing was working, So tried to install versions of libxml2 but everything in vain.
So use the below command to you will be in good shape then,
sudo installer -pkg /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg -target /

OS X Lion, Attempting Nokogiri install - libxml2 is missing

sudo gem install nokogiri
Building native extensions. This could take a while...
ERROR: Error installing nokogiri:
ERROR: Failed to build gem native extension.
/Users/sajeev86/.rvm/rubies/ruby-1.8.7-p352/bin/ruby extconf.rb
checking for libxml/parser.h... no
-----
libxml2 is missing. please visit http://nokogiri.org/tutorials/installing_nokogiri.html for help with installing dependencies.
-----
*** 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.
I can't get Nokogiri to install. This has been taxing me for a while now. I've installed the dependencies via MacPorts and Homebrew as well.
I've got a feeling the right directories are not pointed to each other? But haven't a clue how to fix.
In Mavericks, installing the libraries with Homebrew and setting NOKOGIRI_USE_SYSTEM_LIBRARIES=1 before installing the gem did the trick for me.
Summarising:
If previously installed, uninstall the gem:
$ gem uninstall nokogiri
Use Homebrew to install libxml2, libxslt and libiconv:
$ brew install libxml2 libxslt libiconv
Install the gem specifying the paths to the libraries to be linked against:
$ NOKOGIRI_USE_SYSTEM_LIBRARIES=1 gem install nokogiri -- --use-system-libraries --with-iconv-dir="$(brew --prefix libiconv)" --with-xml2-config="$(brew --prefix libxml2)/bin/xml2-config" --with-xslt-config="$(brew --prefix libxslt)/bin/xslt-config"
Absolutely none of the other answers here worked for me.
On the latest version of Mavericks, the only method that succeeded for me was the following:
$ brew install libxml2 libxslt libiconv
$ sudo gem install nokogiri -v '1.6.5' -- --use-system-libraries --with-xml2-include=/usr/include/libxml2 --with-xml2-lib=/usr/lib
Same issue happened to me on Lion. Took hours of reading posts, trying homebrew, macports, etc. When I found this post and read the contents of .rvm/gems/ruby-1.8.7-p358/gems/nokogiri-1.4.4/ext/nokogiri/mkmf.log, I saw:
find_header: checking for libxml/parser.h... -------------------- no
"/usr/bin/gcc-4.2 -E -I. -I/Users/me/.rvm/rubies/ruby-1.8.7-p358/lib/ruby/1.8/i686-darwin10.8.0 -I. -I-I-I/opt/local/include -I-I-I/usr/local/include -I-I-I/Users/me/.rvm/rubies/ruby-1.8.7-p358/include -I-I-I/usr/include -I-I-I/usr/include/libxml2 -I/opt/local/include/libxml2 -I/usr/local/include/libxml2 -I/Users/me/.rvm/rubies/ruby-1.8.7-p358/include/libxml2 -I-I/opt/local/include -I-I/usr/local/include -I-I/Users/me/.rvm/rubies/ruby-1.8.7-p358/include -I-I/usr/include -I-I/usr/include/libxml2 -I/opt/local/include -I/usr/local/include -I/Users/me/.rvm/rubies/ruby-1.8.7-p358/include -I/usr/include -I/usr/include/libxml2 -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -g -O2 -fno-common -pipe -fno-common -g -DXP_UNIX -O3 -Wall -Wcast-qual -Wwrite-strings -Wconversion -Wmissing-noreturn -Winline conftest.c -o conftest.i"
checked program was:
/* begin */
1: #include <libxml/parser.h>
/* end */
However, gcc-4.2 didn't exist:
$ ls /usr/bin/gcc*
/usr/bin/gcc
Hence, I was able to solve the issue and get nokogiri to install by making a gcc-4.2 a symlink to gcc.
sudo ln -s gcc gcc-4.2
I ran into same issue for Mavrick and solution was the
xcode-select --install
However that was not working as apple download page does not have that installer available publically.
So if you want to have the command-line tools for Mavricks you need to have a paid account then only you will be able to install it.
Once you install it you will not face this issue of Nokogiri.
Checking the url given in the error message (http://nokogiri.org/tutorials/installing_nokogiri.html) I think the question is what version of Homebrew are you using?
brew -v
I'd update to 0.8+
brew update
brew upgrade
and then try the installation again:
brew install libxml2 libxslt
brew link libxml2 libxslt
gem install nokogiri
As for me, it helps:
brew install libxml2 libxslt
if permission denied sudo chown -R $USER /Library/Caches/Homebrew
sudo env ARCHFLAGS="-arch x86_64"
export NOKOGIRI_USE_SYSTEM_LIBRARIES=1
NOKOGIRI_USE_SYSTEM_LIBRARIES=1 gem install nokogiri
brew install libxml2 libxslt
gem install nokogiri -v '1.6.5' -- --use-system-libraries
Late to the party, but in case anyone is still having this issue while using MacPorts:
Add the /include dir to your PATH in your .profile file so nokogiri knows where to find it.
e.g.
MacPorts writes to your .profile file and adds the following line by default:
export PATH=/opt/local/bin:/opt/local/sbin:$PATH
First, add the /include path like so:
export PATH=/opt/local/bin:/opt/local/sbin:/opt/local/include/:$PATH
Then, run this from the same terminal window:
source ~/.profile
(this tells your terminal to recheck the .profile file for any changes)
Finally, try installing the gem from the same terminal window.
sudo gem install nokogiri
On Yosemite I used:
brew install libxml2 libxslt
sudo gem install nokogiri -v '1.6.5' -- --use-system-libraries --with-xml2-include=/usr/include/libxml2 --with-xml2-lib=/usr/lib
Very close to some of the above commands but without the libconv
For my somewhat outdated system encountering the issues above, specifically:
FENG-SHUI:demo Eric$ brew install libxml2
==> Downloading ftp://xmlsoft.org/libxml2/libxml2-2.9.0.tar.gz
######################################################################## 100.0%
==> Downloading patches
######################################################################## 100.0%
######################################################################## 100.0%
==> Patching patching file threads.c patching file xpath.c
==> ./configure --prefix=/usr/local/Cellar/libxml2/2.9.0 --without-python
==> make
==> make install
==> Caveats This formula is keg-only: so it was not symlinked into /usr/local.
Mac OS X already provides this software and installing another version in parallel can cause all kinds of trouble.
Generally there are no consequences of this for you. If you build your own software and it requires this formula, you'll need to add to your build variables:
LDFLAGS: -L/usr/local/opt/libxml2/lib
CPPFLAGS: -I/usr/local/opt/libxml2/include
Error: Failed to create: /usr/local/opt/libxml2
Things that depend on libxml2 will probably not build.
==> Summary /usr/local/Cellar/libxml2/2.9.0: 273 files, 11M, built in 2.0 minutes
FENG-SHUI:demo Eric$ brew install libxml2 libxslt
Error: libxml2-2.9.0 already installed
Error: /usr/local/opt/libxml2 not present or broken Please reinstall libxml2. Sorry :(
This was the magic formula for getting libxml2 and libxslt happily running:
# latest version 2.9.0
brew install libxml2
# installing libxslt from source code
# get latest libxslt from ftp://xmlsoft.org/libxml2/libxslt-git-snapshot.tar.gz..
# then
./configure --prefix=/usr/local/Cellar/libxslt/1.1.28 --with-libxml-prefix=/usr/local/Cellar/libxml2/2.9.0
make
sudo make install
# installing nokogiri with this new compiled libs
gem install nokogiri -- --with-xml2-include=/usr/local/Cellar/libxml2/2.9.0/include/libxml2 --with-xml2-lib=/usr/local/Cellar/libxml2/2.9.0/lib --with-xslt-dir=/usr/local/Cellar/libxslt/1.1.28
Thanks to this guy: https://gist.github.com/fabioyamate/443160
Hope this helps someone!
Try adding --with-xml2-include=/opt/local/include/libxml2 --with-xml2-lib=/opt/local/lib to your command, assuming that's where MacPorts libxml2.
I struggled with this for hours until I found this blogpost: http://www.markhneedham.com/blog/2010/07/08/installing-ruby-1-9-2-with-rvm-on-snow-leopard
Running the command
file /usr/local/lib/libxml2.2.dylib
in the terminal returned
/usr/local/lib/libxml2.2.dylib: Mach-O dynamically linked shared library i386
which means my libxml2.2 was compiled for a 32 bit system, so I had to recompile libxml2 for 64 bit OS (Lion)
First I downloaded LATEST_LIBXML2 from ftp://xmlsoft.org/libxml2 and ran the following commands:
tar xzvf LATEST_LIBXML2
cd libxml2-2.8.0
./configure --with-python=/System/Library/Frameworks/Python.framework/Versions/2.3/
make
Then I downloaded LATEST_LIBXSLT from the same site and ran these commands:
tar xzvf LATEST_LIBXSLT
cd libxslt-1.1.26
./configure
make
sudo make install
Running
file /usr/local/lib/libxml2.2.dylib
again returned
/usr/local/lib/libxml2.2.dylib: Mach-O 64-bit dynamically linked shared library x86_64
And I could finally install nokogiri!
This worked for me on OSX - the same as #remeberer's answer, but with a full path.
sudo ln -s /usr/bin/gcc /usr/bin/gcc-4.2
I had to use this command for it to work :
sudo gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/include/libxml2 --use-system-libraries
(source : http://www.virtlab.cx/ruby-fix-error-install-nokogiri-yosemite/ , many thanks to the author)
ran into a similar install issue on mountain lion except the make command was looking for gcc-4.2 in /usr/local/opt/apple-gcc42/bin
this resolved the issue for me; no need to brew install libxml2 or libxslt or add a --with option:
mkdir -p /usr/local/opt/apple-gcc42/bin
ln -s /usr/bin/gcc /usr/local/opt/apple-gcc42/bin/gcc-4.2
If you're installing an older version of Nokogiri, i.e. pre 1.6, this may help:
In the Nokogiri installation guide, they mention:
Because Nokogiri needs to be compiled and dynamically linked against
both libxml2 and libxslt, it has gained a reputation for being
complicated to install.
As of Nokogiri 1.6, libxml2 and libxslt source code is bundled with
Nokogiri, and compiled at gem-install-time. This document should work
for all versions 1.6.4 and later.
(If you need support for installing earlier versions of Nokogiri, you
may want to take a look at the git history for this document.)
Indeed, it is difficult to install, but there is a way. I went digging through the history of the readme, and decided on this one, with the well-written commit message:
"Homebrew, I straight hate you."
From that message and from the other answers here, I gleaned that I needed to be very specific about libxml2's lib, dir and include directories when installing Nokogiri. The following worked for me, but please update to match your version of the libxml2 software (mine was 2.9.2 and I was installing Nokogiri 1.5.0):
NOKOGIRI_USE_SYSTEM_LIBRARIES=1 gem install nokogiri -v '1.5.0' --
--use-system-libraries
--with-xml2-lib=/usr/local/Cellar/libxml2/2.9.2/lib
--with-xml2-config="$(brew --prefix libxml2)/bin/xml2-config"
--with-xslt-config="$(brew --prefix libxslt)/bin/xslt-config"
--with-xml2-dir=/usr/local/Cellar/libxml2/2.9.2/
--with-xml2-include=/usr/local/Cellar/libxml2/2.9.2/include/libxml2
For me, I simply did the following
xcode-select --install
gem install nokogiri
For more in-depth troubleshooting, checkout Installing Nokogiri

Nokogiri installation fails -libxml2 is missing

I always worked my way around Nokogiri installation issues by following the documentation in the "Installing Nokogiri" tutorial.
But this time, even after installing all the dependencies, Nokogiri hasn't been installed. I get the following error:
libxml2 is missing. please visit <http://nokogiri.org/tutorials/installing_nokogiri.html>
I tried installing it by specifying the libxml2 and libxslt directories:
sudo gem install nokogiri -- --with-xml2-include=/usr/include/libxml2 --with-xml2-lib=/usr/lib --with-xslt-dir=/usr/
but it returned the same error.
I followed all the other related Stack Overflow articles and none helped. Does anyone have a solution?
You may actually need to install both of these packages
sudo apt-get install libxslt-dev libxml2-dev
First, install the dependencies:
sudo apt-get install libxslt-dev libxml2-dev
If you still receive the error, you may be missing a compiler toolchain:
sudo apt-get install build-essential
You'll get the "libxml2 is missing" error if you're missing a build toolchain (at least I ran into this issue on Debian Lenny).
The Nokogiri build test-compiles a libxml2 header file to verify that it is present, however, it doesn't differentiate between "libxml2 is missing" and "a compiler to test libxml2 is missing".
In Mac OS X (Mavericks), installing the libraries with brew and setting NOKOGIRI_USE_SYSTEM_LIBRARIES=1 before installing the gem did the trick for me.
Summarising:
If previously installed, uninstall the gem:
gem uninstall nokogiri
Use Homebrew to install libxml2, libxslt and libiconv:
brew install libxml2 libxslt libiconv
Install the gem specifying the paths to the libraries to be linked against:
NOKOGIRI_USE_SYSTEM_LIBRARIES=1 gem install nokogiri -- --use-system-libraries --with-iconv-dir="$(brew --prefix libiconv)" --with-xml2-config="$(brew --prefix libxml2)/bin/xml2-config" --with-xslt-config="$(brew --prefix libxslt)/bin/xslt-config"
I just had the same issue on Fedora 13. After a frustrating and unsuccessful search to make
gem install nokogiri
work for me, I was able to install it and get around the libxml2 error via yum.
Simply install the gem via yum instead of the gem command:
su
yum search rubygem-nokogiri #this find the proper package name
yum install rubygem-nokogiri.i686
This helped me find the right answer for Fedora and, as I am using RVM for Ruby package management,
yum install rubygem-nokogiri
will pull in all the Ruby gems and dependencies into the system, not into my RVM environment, and in my experience that leads to a very frustrating and humbling experience.
So, taking your find of the Nokogiri yum gem you can use:
yum provides rubygem-nokogiri
and get a list of the dependencies for rubygem-Nokogiri which showed me the libraries that were missing. After that I ran:
yum install libxml2-devel libxslt libxslt-devel
Now Nokogiri compiles in Fedora and Nokogiri installs. D'oh!, we need the headers to compile Nokogiri from the devel libraries.
In Mac OS X (Mavericks) if none of these solutions work, try:
ARCHFLAGS="-arch x86_64" gem install nokogiri
or
ARCHFLAGS="-arch i386" gem install nokogiri
depending on your system's architecture.
You usually need development files for building gems. Try:
sudo apt-get install libxslt-dev libxml2-dev
(I just saw that Eric suggested the same in a comment.)
I was able to get this installed with Chocolatey, Windows 8.1 x64, and DevKit x64.
cinst libxml2
cinst libxslt
cinst libiconv
gem install nokogiri --
--with-xml2-include=C:\Chocolatey\lib\libxml2.2.7.8.7\build\native\include
--with-xml2-lib=C:\Chocolatey\lib\libxml2.redist.2.7.8.7\build\native\bin\v110\x64\Release\dynamic\cdecl
--with-iconv-include=C:\Chocolatey\lib\libiconv.1.14.0.11\build\native\include
--with-iconv-lib=C:\Chocolatey\lib\libiconv.redist.1.14.0.11\build\native\bin\v110\x64\Release\dynamic\cdecl
--with-xslt-include=C:\Chocolatey\lib\libxslt.1.1.28.0\build\native\include
--with-xslt-lib=C:\Chocolatey\lib\libxslt.redist.1.1.28.0\build\native\bin\v110\x64\Release\dynamic
You'll have to verify the version number in the paths are correct.
You may possibly need to add Microsoft's NuGet repository:
-Source "https://go.microsoft.com/fwlink/?LinkID=230477"
It will be:
sudo yum install -y libxml2 libxml2-devel
on RHEL servers.
At macOS none of above/below had really worked for me until I explicitly provided XCode libxml2 path to --with-xml2-include.
gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/libxml2 --use-system-libraries
I was able to install Nokogiri 1.6.5 on Fedora 20 by doing:
export NOKOGIRI_USE_SYSTEM_LIBRARIES=true
Then running:
gem install nokogiri
For anyone else experiencing this issue, I solved it by running this command within the project directory
gem install nokogiri -- --use-system-libraries
Update: I ran into this again and tried just updating the gem which worked for me...
gem update nokogiri
Have you tried installing libxml2? Not from rubygems, but via the standard install process for your operating system. On Ubuntu/Debian for example:
sudo apt-get install libxml2
On any recent version of OS X it should already be installed.
For OSX users, if you've had success installing Nokogiri before, yet are getting errors installing it on, say, using a new version of Ruby that you've added and that error that includes a message like:
The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
This could be indicative of a XCode upgrade having happened via the App Store, either manually or automatically, and you not having opened it since that time.
If so, you should be able to open XCode, agree to the new license, and then install Nokogiri successfully.
On Mac OS X Yosemite my mistake was that I tried to use sudo gem install when it's a rule of thumb to not use superuser privileges when installing gems.
In my case it tried to modify the system installation of Ruby, and that's not a good idea. I installed rbenv, installed Ruby 2.2.2 thru it and set it as global, which is a term from rbenv's documentation. After that Nokogiri could install itself with a simple
gem install nokogiri
No hacks or workarounds were necessary, just a properly set environment; Nokogiri does the rest perfectly.
Was able to install vagrant-awe by following the above post but using the command as follow:
NOKOGIRI_USE_SYSTEM_LIBRARIES=1 vagrant plugin install vagrant-aws
For Windows x64:
gem inst nokogiri --pre --platform ruby
For more information check this thread: https://github.com/sparklemotion/nokogiri/issues/864
I was able to install Nokogiri by running the following packages:
$ dnf group install "C Development Tools and Libraries"
$ dnf install ruby-devel libxml2-devel patch
=== TLDR ===
As the instructions state, build Ruby with the latest clang compiler, or at least the same version that Rubygems will use to compile Nokogiri's native extensions libxml and libxsl.
If using RVM, building from source with the --with-ggc=clang flag was what did it for me:
rvm install 2.2 --with-gcc=clang
Replace 2.2 with whatever version you want. --with-gcc=clang ensures RVM builds from source and uses clang to do so; otherwise RVM may a pre-built binary Ruby, which is what tripped me up.
Then, install Nokogiri as normal using Bundler or Rubygems.
=== IN DEPTH ===
I struggled with this for a while. gem install nokogiri gave me:
checking for xmlParseDoc() in libxml/parser.h... no
checking for xmlParseDoc() in -lxml2... no
checking for xmlParseDoc() in -llibxml2... no
Digging into mkmf.log I saw:
conftest.c:15:27: error: too few arguments to function call, single argument 'cur' was not specified
int t(void) { xmlParseDoc(); return 0; }
Nokogiri supplies its own libxml and libxsl (as of 1.6.4). The signature defined in Nokogiri's local copy of parser.h (found under the gem install directory) is:
xmlParseDoc (const xmlChar *cur);
So I was at a loss as to how the method call in the hermetically sealed conftest.c file usage couldn't match up with the header file for parser.h.
When I realized I had probably installed a binary Ruby I removed and reinstalled using --with-gcc=clang (to force compilation and use clang) and the problem was solved:
rvm uninstall 2.2
rvm install 2.2 --with-gcc=clang
gem install nokogiri
I'm not exactly sure why that works as the system libxml header /usr/include/libxml2/libxml/parser.h has the same signature as Nokogiri's local copy.
It's weird, but it worked. Just make sure you compile a Ruby with clang.
gem install nokogiri -- --with-xml2-include=/usr/local/Cellar/libxml2/2.7.8/include/libxml2 --with-xml2-lib=/usr/local/Cellar/libxml2/2.7.8/lib --with-xslt-dir=/usr/local/Cellar/libxslt/1.1.26 --with-iconv-include=/usr/local/Cellar/libiconv/1.14/include --with-iconv-lib=/usr/local/Cellar/libiconv/1.14/lib
Change your version with it.

Can't find the PostgreSQL client library (libpq)

I'm trying to install PostgreSQL for Rails on Mac OS X 10.6. First I tried the MacPorts install but that didn't go well so I did the one-click DMG install. That seemed to work.
I suspect I need to install the PostgreSQL development packages but I have no idea how to do that on OS X.
Here's what I get when I try to do sudo gem install pg:
$ sudo gem install pg
Building native extensions. This could take a while...
ERROR: Error installing pg:
ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb
checking for pg_config... yes
Using config values from /Library/PostgreSQL/8.3/bin/pg_config
checking for libpq-fe.h... yes
checking for libpq/libpq-fs.h... yes
checking for PQconnectdb() in -lpq... no
checking for PQconnectdb() in -llibpq... no
checking for PQconnectdb() in -lms/libpq... no
Can't find the PostgreSQL client library (libpq)
*** 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=/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby
--with-pg
--without-pg
--with-pg-dir
--without-pg-dir
--with-pg-include
--without-pg-include=${pg-dir}/include
--with-pg-lib
--without-pg-lib=${pg-dir}/lib
--with-pg-config
--without-pg-config
--with-pg_config
--without-pg_config
--with-pqlib
--without-pqlib
--with-libpqlib
--without-libpqlib
--with-ms/libpqlib
--without-ms/libpqlib
Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/pg-0.11.0 for inspection.
Results logged to /Library/Ruby/Gems/1.8/gems/pg-0.11.0/ext/gem_make.out
$ sudo su
$ env ARCHFLAGS="-arch x86_64" gem install pg
Building native extensions. This could take a while...
Successfully installed pg-0.11.0
1 gem installed
Installing ri documentation for pg-0.11.0...
Installing RDoc documentation for pg-0.11.0...
WORKED!
I tried the top-rated answer here:
env ARCHFLAGS="-arch x86_64" gem install pg
But when I tried running bundle install again, it had the same error. Then I tried the entire bundle install with ARCHFLAGS like so:
ARCHFLAGS="-arch x86_64" bundle install
Worked for me! Make sure to replace x86_64 with i386 depending on what architecture you have.
I was just having this problem when using the EnterpiseDB .dmg. If that's the same think you used, I got it to work by specifying the right architecture:
sudo env ARCHFLAGS="-arch i386" gem install pg
There are some tutorials on the web that said to specify a different architecture (like "-arch x86_64" for people who used MacPorts) but it wasn't working for me because I used the single file install.
If using Yosemite:
brew install postgres
Then:
ARCHFLAGS="-arch x86_64" gem install pg
And (optional) finally, if you want to launch autovacuum...
postgres -D /usr/local/var/postgres
Solution: reinstalled PostgreSQL with Homebrew.
Maybe you can try this one:
ARCHFLAGS="-arch i386 -arch x86_64" gem install pg
To know the architecture of your library you can use
file /usr/local/lib/libpq.dylib
which gave just 1 architecture in my case (installed via homebrew):
/usr/local/lib/libpq.dylib: Mach-O 64-bit dynamically linked shared library x86_64
The error message is right there:
Can't find the PostgreSQL client library (libpq)
You can fix that by using homebrew to install it
brew install libpq
The following, or a similar, message will appear:
If you need to have libpq first in your PATH, run:
echo 'export PATH="/opt/homebrew/opt/libpq/bin:$PATH"' >> ~/.zshrc
For compilers to find libpq you may need to set:
export LDFLAGS="-L/opt/homebrew/opt/libpq/lib"
export CPPFLAGS="-I/opt/homebrew/opt/libpq/include"
You can then run it:
export PATH="/opt/homebrew/opt/libpq/bin:$PATH"
gem install pg
Done.
Most of those answers focus on giving you one command that just works.
However they only work for some particular scenarii.
If you have trouble figuring out which command you should run, you better understand what is happening.
Why doesn't it work?
The pg gem is a native extension written in C. It relies on the libpq library which is the PostgreSQL library for C applications.
So, during its build, the pg gem needs to be able to find the library libqp compiled for the same architecture (for example x86_64 or arm64).
There can be a mismatch if:
you are on a m1 macbook (apple silicon) but have installed postgres in rosetta 2 mode.
you are on a 64-bit computer but have installed postgres in 32-bit mode.
If you end up in this situation, you have several options:
try to compile the pg gem in the same architecture as postgres
reinstall postgres to match the architecture in which the pg gem is built (by default it's the same as ruby's)
Example
For instance, in my case, I have a m1 macbook.
I have installed ruby in "rosetta 2" mode (x86_64) and postgres in "native" mode (arm64).
You can check the architecture with the lipo -info command:
which ruby
# You might need to use a different command if you use a ruby version manager
# "which ruby" if you use rvm
# "rbenv which ruby" if you use rbenv
# "asdf which ruby" if you use asdf
=> /Users/leo/.rbenv/versions/2.6.6/bin/ruby
lipo -info /Users/leo/.rbenv/versions/2.6.6/bin/ruby
=> /Users/leo/.rbenv/versions/2.6.6/bin/ruby is architecture: x86_64
which postgres
=> /opt/homebrew/bin/pg_config
lipo -info /opt/homebrew/bin/pg_config
=> Non-fat file: /opt/homebrew/bin/pg_config is architecture: arm64
To solve this, in my case, I just had to add to the PATH another version of postgres compiled in x86_64. It allowed the pg gem to be able to find binaries in the right architecture:
export PATH=/usr/local/Cellar/postgresql/13.2_1/bin:$PATH
gem install pg
# and finally 🎉
=> Building native extensions. This could take a while...
=> Successfully installed pg-1.2.3
=> Parsing documentation for pg-1.2.3
=> Installing ri documentation for pg-1.2.3
=> Done installing documentation for pg after 1 seconds
=> 1 gem installed
If you are getting this error in Mac M1 pro, Silicon chip
Issue:
checking for PQconnectdb() in -lpq... no
checking for PQconnectdb() in -llibpq... no
checking for PQconnectdb() in -lms/libpq... no
Can't find the PostgreSQL client library (libpq)
Solution:
Install libpq via homebrew and add it to the PATH
brew install libpq
echo 'export PATH="/opt/homebrew/opt/libpq/bin:$PATH"' >> ~/.zshrc
source ~/.zshrc
OR ~/bash_profile if you use it instead.
Try:
bundle install # OR
gem install pg
This works for me.
Fake out gem by prefixing the appropriate environment variables. If you were installing from MacPorts, you should be able to walk through the following procedure:
% /opt/local/lib/postgresql91/bin/pg_config
BINDIR = /opt/local/lib/postgresql91/bin
DOCDIR = /opt/local/share/doc/postgresql
HTMLDIR = /opt/local/share/doc/postgresql
INCLUDEDIR = /opt/local/include/postgresql91
PKGINCLUDEDIR = /opt/local/include/postgresql91
INCLUDEDIR-SERVER = /opt/local/include/postgresql91/server
LIBDIR = /opt/local/lib/postgresql91
PKGLIBDIR = /opt/local/lib/postgresql91
LOCALEDIR = /opt/local/share/locale
MANDIR = /opt/local/share/man
SHAREDIR = /opt/local/share/postgresql91
SYSCONFDIR = /opt/local/etc/postgresql91
PGXS = /opt/local/lib/postgresql91/pgxs/src/makefiles/pgxs.mk
CONFIGURE = '--prefix=/opt/local' '--sysconfdir=/opt/local/etc/postgresql91' '--bindir=/opt/local/lib/postgresql91/bin' '--libdir=/opt/local/lib/postgresql91' '--includedir=/opt/local/include/postgresql91' '--datadir=/opt/local/share/postgresql91' '--mandir=/opt/local/share/man' '--with-includes=/opt/local/include' '--with-libraries=/opt/local/lib' '--with-openssl' '--with-bonjour' '--with-readline' '--with-zlib' '--with-libxml' '--with-libxslt' '--enable-thread-safety' '--enable-integer-datetimes' '--with-ossp-uuid' 'CC=/usr/bin/gcc-4.2' 'CFLAGS=-pipe -O2 -arch x86_64' 'LDFLAGS=-L/opt/local/lib -arch x86_64' 'CPPFLAGS=-I/opt/local/include -I/opt/local/include/ossp'
CC = /usr/bin/gcc-4.2
CPPFLAGS = -I/opt/local/include -I/opt/local/include/ossp -I/opt/local/include/libxml2 -I/opt/local/include
CFLAGS = -pipe -O2 -arch x86_64 -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wformat-security -fno-strict-aliasing -fwrapv
CFLAGS_SL =
LDFLAGS = -L/opt/local/lib -arch x86_64 -L/opt/local/lib -L/opt/local/lib -Wl,-dead_strip_dylibs
LDFLAGS_EX =
LDFLAGS_SL =
LIBS = -lpgport -lxslt -lxml2 -lssl -lcrypto -lz -lreadline -lm
VERSION = PostgreSQL 9.1beta1
From there, pull out the LIBDIR, INCLUDEDIR, CPPFLAGS, LIBS and LDFLAGS (the one that I think will get you running is LIBDIR, however). Then you'd run:
setenv PATH /opt/local/lib/postgresql91/bin:${PATH}
sudo env LDFLAGS=-L`pg_config --libdir` CPPFLAGS=`pg_config --cppflags` gem install pg
That should do it for you. Let me know if it doesn't.
The problem we had was pretty weird.
ruby -v # was ok (rbenv)
gem -v # was ok (rbenv)
but when we did a bundle install in fact, bundler wasn't installed for the version of ruby that was installed by rbenv, so, when we typed bundle install, it used the bundler of the system.
So before running bundle install, be sure that you have installed bundler by running
gem install bundler
libpq from Postgres.app will not work on ARM-based Macs, as Postgres.app is not getting released for ARM (only Universal Intel/ARM packages get released, which is just x86_64 emulation on ARM64):
~ > file /Applications/Postgres.app/Contents/Versions/13/lib/libpq.dylib
/Applications/Postgres.app/Contents/Versions/13/lib/libpq.dylib: Mach-O 64-bit dynamically linked shared library x86_64
For this reason, I decided to install libpq separately from Homebrew:
brew install libpq
Then installing pg worked with this:
gem install pg -- --with-pq-dir=/opt/homebrew/opt/libpq/
(MacOS 11.6 Big Sur on MacBook Pro 13" 2020 with Apple M1 CPU)
I don't think you need the postgres development files, everything you need should have been included with your installer. It's more likely that the path they're installed to isn't in your environment path and therefore gem can't find them when it tries to compile pg.
You shouldn't have to run gem install pg as root, in fact if you do it's likely your PATH (root's PATH if run w/ sudo) won't contain the necessary info.
The following usually works for me:
# Might be different depending on where your installer installed postgres 8.3
export PATH=$PATH:/Library/PostgreSQL/8.3/include/
export ARCHFLAGS='-arch x86_64'
gem install pg
This is what finally did it for me (combination of multiple solutions provided before along with other posts):
$ sudo env ARCHFLAGS="-arch x86_64" gem install pg -- with-pg-include=/Library/PostgreSQL/9.6/include/
Well, I have tried all the solutions given above for
Can't find the PostgreSQL client library (libpq)
$ sudo su
$ env ARCHFLAGS="-arch x86_64" gem install pg
but nothing helped.
For this reason, I decided to install libpq separately from Homebrew:
brew install libpq
then found a small catch though: libpq won't install itself in the /usr/local/bin directory for mac. To make that happen, you need to run:
brew link --force libpq
Which will symlink all the tools, not just libpq, into the /usr/local/bin directory. You're ready to run psql and start connecting now.
The ARCHFLAGS answer that others have proposed will not work if you somehow ended up with a 64-bit version of postgres (which homebrew will install) and a 32-bit version of ruby. For some reason rbenv insists on building ruby 1.9.2-p290 as 32-bit for me, which makes it impossible to link against 64-bit postgres.
Check the architecture of your ruby binary with
file `which ruby`
or if using rbenv
file `rbenv which ruby`
And compare against your postgres:
file `which postgres`
If there's a mis-match you'll need to re-install postgres or ruby. With rbenv I solved this just by switching to a different version: 1.9.3-p194 instead of 1.9.2-p290.
This is how I made it to work on Mavericks. Note: I already had installed postgresql 9.3 from homebrew.
Update Xcode to 5.0 from App Store
Install command line developer tools
xcode-select --install
Agree to Xcode license
sudo xcodebuild -license
Install gem
ARCHFLAGS="-arch x86_64" gem install pg
So basically I did this ;-)
brew install postgres
For my mac m1 after trying all of above solution and nothing working. I made it work by:
Install Homebrew x86
brew x86 will locate on: /usr/local/Homebrew/bin/brew
brew arm64 locate on: /opt/homebrew/bin/brew (my current brew)
Install libpq with arch x86 ( Since pg must be compiled with x86 libpq )
arch --x86_64 /usr/local/Homebrew/bin/brew install libpq
Install gem pg
gem install pg -v '0.18.2' -- --with-pq-dir=/usr/local/Cellar/libpq/14.2 --with-pg-config=/usr/local/Cellar/libpq/14.2/bin/pg_config
I'm probably a bit late to the party here, but in my case I was using rbenv and upgrading to Ruby 2.2.3. I had to install Bundler to get mine to work, I had an old system version.
gem install bundler
As mentioned above this has to do with the fact of having two ruby archs on rbenv /usr/bin/ruby: Mach-O universal binary with 2 architectures: [x86_64:Mach-O 64-bit executable x86_64] [i386:Mach-O executable i386] what i had to do was simply install pg gem forcing x86_64 arch to be used with this command:
sudo env ARCHFLAGS="-arch x86_64" gem install pg
Remember to have your bash_profile up to date
Add the path of your postgres, in this case im using Postgres app (OSX) instead of brew (https://postgresapp.com/) by default this is the location:
export PATH=/Applications/Postgres.app/Contents/Versions/10/bin:$PATH
Reload bash with
sudo vi ~/.bash_profile
After doing this i was able to finally successfully install pg gem
Hope this helps!
On Mac you can try this (works for me):
gem install pg -- with-pg-include=/Library/PostgreSQL/9.5/include
Fetching: pg-1.0.0.gem (100%)
Building native extensions with: 'with-pg-include=/Library/PostgreSQL/9.5/include'
This could take a while...
Successfully installed pg-1.0.0
Parsing documentation for pg-1.0.0
Installing ri documentation for pg-1.0.0
Done installing documentation for pg after 3 seconds
1 gem installed
(this part "/Library/PostgreSQL/9.5/include" you must put your Postgres path)
For those of you that tried the top answers and they didn't quite work, I thought I'd explain my situation and how it was fixed.
I was trying to use postgres for a Ruby project, using bundle install (and with a gem 'pg' in my gemfile), but I already had Postgres installed before, probably by using npm install pg or something like that.
I had an existing database, with data, and I was concerned that if I ran brew install postgres then it would wipe my existing data and tables.
It didn't! brew install postgres worked perfectly as suggested by #Jackie Chan
If you want to put your mind at ease though, you can back up your data as described at this link https://www.tecmint.com/backup-and-restore-postgresql-database/ e.g.
cd desktop
pg_dump -U your_db_user your_database_name >> file_containing_backup.sql

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