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railsでDBにPostgreSQLを指定してプロジェクトを作成しましたが、エラーが発生し `bundle install`
できません。恐れ入りますが、どなたかご教授頂ければと存じます。

※ `brew install postgresql` を実行した場合は Warning: postgresql-9.6.3 already
installed と表示されるのでPostgreSQLはインストール済みです。パスの問題なのでしょうか？

### 手順

  1. `rails new hoge -d postgresql`
  2. Gemfileへgem 'pg'を追加
  3. `bundle install` を実行
  4. エラー発生

エラー内容

```

    Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
    
    /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb
    checking for pg_config... yes
    Using config values from /usr/local/bin/pg_config
    checking for libpq-fe.h... yes
    checking for libpq/libpq-fs.h... yes
    checking for pg_config_manual.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/2.0/usr/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}/
    --with-pqlib
    --without-pqlib
    --with-libpqlib
    --without-libpqlib
    --with-ms/libpqlib
    --without-ms/libpqlib
    
    
    Gem files will remain installed in /var/folders/4v/dsv8p_992w1f1f5bjqfwrp2h0000gn/T/bundler20170603-10893-150s2dspg-0.20.0/gems/pg-0.20.0 for inspection.
    Results logged to /var/folders/4v/dsv8p_992w1f1f5bjqfwrp2h0000gn/T/bundler20170603-10893-150s2dspg-0.20.0/gems/pg-0.20.0/ext/gem_make.out
        
    An error occurred while installing pg (0.20.0), and Bundler cannot continue.
    Make sure that `gem install pg -v '0.20.0'` succeeds before bundling.
    
```
CC BY-SA 4.0
2017-06-03T07:59:09.287
35245
2023-08-04T02:40:28.303
2023-08-04T02:40:28.303
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question
ruby-on-rails postgresql rubygems
rails newでpostgresqlの場合エラーが発生する
原因は不明なのですが、以下の記事を参照して解決できました。

[Mavericks でgem install pgしてNo
pg_configになるとき](http://qiita.com/satton_maroyaka/items/e142b7590eec1a649e8b)
CC BY-SA 4.0
2017-06-03T08:18:13.850
35249
2023-08-03T14:48:30.663
2023-08-03T14:48:30.663
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answer
database.ymlの設定でpostgresqlの記述はありますでしょうか？
CC BY-SA 4.0
2023-08-03T12:49:18.717
95842
2023-08-03T12:49:18.717
59138
35245
answer