rails new でエラーが出るが対処法がわからない

Question

rails new を実施したところエラーが出てうまくいかないです

やりたいこと　　エラーを解消しrails newをだたしく起動させたい

[vagrant@localhost rails_lessons]$ rails new my_memo
      create
      create  README.md
      create  Rakefile
            :
            :
      create  tmp/storage
      create  tmp/storage/.keep
      remove  config/initializers/cors.rb
      remove  config/initializers/new_framework_defaults_6_0.rb
         run  bundle install
The dependency tzinfo-data (>= 0) will be unused by any of the platforms Bundler is installing for. Bundler is installing for ruby but the dependency is only for x86-mingw32, x86-mswin32, x64-mingw32, java. To add those platforms to the bundle, run `bundle lock --add-platform x86-mingw32 x86-mswin32 x64-mingw32 java`.
Fetching gem metadata from https://rubygems.org/............
Fetching gem metadata from https://rubygems.org/.
Resolving dependencies......
Using rake 13.0.1
Using concurrent-ruby 1.1.5
           :
           :
Using sassc-rails 2.1.2
Using sass-rails 6.0.0
Using selenium-webdriver 3.142.6
Using spring 2.1.0
Using spring-watcher-listen 2.0.1
Fetching sqlite3 1.4.1
Installing sqlite3 1.4.1 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

current directory:
/home/vagrant/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/sqlite3-1.4.1/ext/sqlite3
/home/vagrant/.rbenv/versions/2.6.5/bin/ruby -I /home/vagrant/.rbenv/versions/2.6.5/lib/ruby/2.6.0 -r
./siteconf20191213-24129-14tuj2s.rb extconf.rb
checking for sqlite3.h... no
sqlite3.h is missing. Try 'brew install sqlite3',
'yum install sqlite-devel' or 'apt-get install libsqlite3-dev'
and check your shared library search path (the
location where your sqlite3 shared library is located).
*** 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-sqlite3-include
        --without-sqlite3-include=${sqlite3-dir}/include
        --with-sqlite3-lib
        --without-sqlite3-lib=${sqlite3-dir}/lib

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

/home/vagrant/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/extensions/x86_64-linux/2.6.0/sqlite3-1.4.1/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in
/home/vagrant/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/sqlite3-1.4.1 for inspection.
Results logged to
/home/vagrant/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/extensions/x86_64-linux/2.6.0/sqlite3-1.4.1/gem_make.out

An error occurred while installing sqlite3 (1.4.1), and Bundler cannot continue.
Make sure that `gem install sqlite3 -v '1.4.1' --source 'https://rubygems.org/'` succeeds before
bundling.

In Gemfile:
  sqlite3
         run  bundle binstubs bundler
Could not find gem 'sqlite3 (~> 1.4)' in any of the gem sources listed in your Gemfile.
         run  bundle exec spring binstub --all
Could not find gem 'sqlite3 (~> 1.4)' in any of the gem sources listed in your Gemfile.
Run `bundle install` to install missing gems.
       rails  webpacker:install
Could not find gem 'sqlite3 (~> 1.4)' in any of the gem sources listed in your Gemfile.
Run `bundle install` to install missing gems.

恐らく重要なのは
①

The dependency tzinfo-data (>= 0) will be unused by any of the platforms Bundler is installing for. Bundler is installing for ruby but the dependency is only for x86-mingw32, x86-mswin32, x64-mingw32, java. To add those platforms to the bundle, run `bundle lock --add-platform x86-mingw32 x86-mswin32 x64-mingw32 java`.

②

Fetching sqlite3 1.4.1
Installing sqlite3 1.4.1 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

③

An error occurred while installing sqlite3 (1.4.1), and Bundler cannot continue.
Make sure that `gem install sqlite3 -v '1.4.1' --source 'https://rubygems.org/'` succeeds before
bundling.

In Gemfile:
  sqlite3
         run  bundle binstubs bundler
Could not find gem 'sqlite3 (~> 1.4)' in any of the gem sources listed in your Gemfile.
         run  bundle exec spring binstub --all
Could not find gem 'sqlite3 (~> 1.4)' in any of the gem sources listed in your Gemfile.
Run `bundle install` to install missing gems.
       rails  webpacker:install
Could not find gem 'sqlite3 (~> 1.4)' in any of the gem sources listed in your Gemfile.
Run `bundle install` to install missing gems.

の3か所の記述のところだと思われるのですが
①に関しては全く原因と対処法が思い浮かびません
②③にかんしてはaqliteのバージョンが違うという事だと思うのですが、gem fileを書き換えて

gem 'sqlite3', '~> 1.4'

を

gem 'sqlite3', '~> 1.4.1'

に書き換えて試すことも試みましたがうまくいきませんでした
原因や解決法を教えていただければと思います

Answer 1

      exist
   identical  README.md
   identical  Rakefile

というエラーからみて、同じアプリケーション名でやっていませんか？
あるdirには同じアプリケーション名では作製できません。
名前を変えるか、別のdirで行うかして下さい

sqlite3関連でのcompileに失敗しています

Installing sqlite3 1.4.1 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

ですので、
Check the mkmf.log file for more details. You may need configuration options.
と言ってますので、mkmf.logを見て下さい。
少なくとも一つは
sqlite3.h is missing.とあります。

 Try 'brew install sqlite3',
'yum install sqlite-devel' or 'apt-get install libsqlite3-dev'
and check your shared library search path (the location where your sqlite3 shared library is located).

と指示がありますから、これを行いましょう

Comments

[story_aniki]

回答ありがとうございます
実は最初にエラーが出て、おっしゃる通りもう一度同じ名前でrails newを不適切に行ってしまいました
ただ、エラーが出ることは間違いがないので、もう一度フォルダを削除してから新しくrails newをしてみました
質問文中のコーどの部分も修正しましたので、もし原因がわかればご回答お願いします

[story_aniki]

ありがとうございます！
無事に解決しました
対策がこんなに素直にエラー文の中に書いてあるのですね
また一つ勉強になりました

[winterboum]

エラーメッセージは宝です