```

    C:\Users\Desktop\RailsSample\first-rails>gem install sqlite3 --platform ruby
    Temporarily enhancing PATH for MSYS/MINGW...
    Installing required msys2 packages: mingw-w64-x86_64-sqlite3
    警告: mingw-w64-x86_64-sqlite3-3.25.2-1 は最新です -- スキップ
    Building native extensions. This could take a while...
    ERROR:  Error installing sqlite3:
            ERROR: Failed to build gem native extension.
    
        current directory: C:/Ruby25-x64/lib/ruby/gems/2.5.0/gems/sqlite3-1.4.0/ext/sqlite3
    C:/Ruby25-x64/bin/ruby.exe -r ./siteconf20190412-5832-177unhn.rb extconf.rb
    checking for sqlite3.h... yes
    checking for pthread_create() in -lpthread... yes
    checking for -ldl... no
    checking for dlopen()... no
    missing function dlopen
    *** 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=C:/Ruby25-x64/bin/$(RUBY_BASE_NAME)
            --with-sqlcipher
            --without-sqlcipher
            --with-sqlite3-config
            --without-sqlite3-config
            --with-pkg-config
            --without-pkg-config
            --with-sqlcipher
            --without-sqlcipher
            --with-sqlite3-dir
            --without-sqlite3-dir
            --with-sqlite3-include
            --without-sqlite3-include=${sqlite3-dir}/include
            --with-sqlite3-lib
            --without-sqlite3-lib=${sqlite3-dir}/lib
            --with-pthreadlib
            --without-pthreadlib
            --with-dllib
            --without-dllib
    
    To see why this extension failed to compile, please check the mkmf.log which can be found here:
    
      C:/Ruby25-x64/lib/ruby/gems/2.5.0/extensions/x64-mingw32/2.5.0/sqlite3-1.4.0/mkmf.log
    
    extconf failed, exit code 1
    
    Gem files will remain installed in C:/Ruby25-x64/lib/ruby/gems/2.5.0/gems/sqlite3-1.4.0 for inspection.
    Results logged to C:/Ruby25-x64/lib/ruby/gems/2.5.0/extensions/x64-mingw32/2.5.0/sqlite3-1.4.0/gem_make.out
    
```
CC BY-SA 4.0
2019-04-11T15:53:22.930
54102
2019-04-11T16:14:05.997
2019-04-11T16:01:46.510
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question
ruby-on-rails windows rubygems
windowsのrailsにsqlite3をインストールしようとするとエラーがでます。解決策を教えてください。
自己解決しました。

ridk exec pacman -S mingw-w64-x86_64-dlfcn

MSYS2上にdlfncパッケージをいれることで解決しました。
CC BY-SA 4.0
2019-04-11T16:14:05.997
54104
2019-04-11T16:14:05.997
32887
54102
answer