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```

    Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
    
        /Users/kojimadaiki/.rvm/rubies/ruby-2.0.0-p645/bin/ruby -r ./siteconf20160104-7569-2gpugj.rb extconf.rb
    checking for pg_config... no
    No pg_config... trying anyway. If building fails, please try again with
     --with-pg-config=/path/to/pg_config
    checking for libpq-fe.h... no
    Can't find the 'libpq-fe.h header
    *** 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/kojimadaiki/.rvm/rubies/ruby-2.0.0-p645/bin/ruby
        --with-pg
        --without-pg
        --enable-windows-cross
        --disable-windows-cross
        --with-pg-config
        --without-pg-config
        --with-pg_config
        --without-pg_config
        --with-pg-dir
        --without-pg-dir
        --with-pg-include
        --without-pg-include=${pg-dir}/include
        --with-pg-lib
        --without-pg-lib=${pg-dir}/
    
    extconf failed, exit code 1
    
    Gem files will remain installed in /Users/kojimadaiki/.rvm/gems/ruby-2.0.0-p645/gems/pg-0.18.4 for inspection.
    Results logged to /Users/kojimadaiki/.rvm/gems/ruby-2.0.0-p645/extensions/x86_64-darwin-14/2.0.0/pg-0.18.4/gem_make.out
    An error occurred while installing pg (0.18.4), and Bundler cannot continue.
    Make sure that `gem install pg -v '0.18.4'` succeeds before bundling.
    
```

githubからフォークしたファイルをbundle installするとたまに上記のようなエラーが表示されます。

gem install pg -v '0.18.4'を打ってみてもエラーが続くのですが、どうしたらよいのでしょうか？
CC BY-SA 3.0
2016-01-04T08:24:38.533
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2016-01-04T11:21:46.160
2016-01-04T10:17:47.427
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question
ruby-on-rails ruby
bundle install時にエラーが表示される
"Can't find the 'libpq-fe.h header" というキーワードで検索してみたところ、Postgres（libpq-
dev）をインストールしたら直った、というような情報がいくつか見つかりました。

参考： [ruby on rails - Can't find the 'libpq-fe.h header when trying to install
pg gem - Stack Overflow](https://stackoverflow.com/questions/6040583/cant-
find-the-libpq-fe-h-header-when-trying-to-install-pg-gem)

Postgresはインストールしていますか？もしまだなら先にPostgresをインストールしてから（Macなら `brew install
postgresql` ）、pg gemをインストールしてみてください。
CC BY-SA 3.0
2016-01-04T11:21:46.160
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2016-01-04T11:21:46.160
2017-05-23T12:38:55.250
-1
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answer