Ruby on rails 未能'；gem安装sqlite3'；

当我运行

railsnewtodo

时，它显示如下（相关问题）

当我运行

gem install sqlite3

时，它显示如下

C:\Ruby21-x64>gem install sqlite3
Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
ERROR:  Error installing sqlite3:
        ERROR: Failed to build gem native extension.

    C:/Ruby21-x64/bin/ruby.exe extconf.rb
checking for sqlite3.h... no
sqlite3.h is missing. Install SQLite3 from http://www.sqlite.org/ first.
*** 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:/Ruby21-x64/bin/ruby
        --with-sqlite3-dir
        --without-sqlite3-dir
        --with-sqlite3-include
        --without-sqlite3-include=${sqlite3-dir}/include
        --with-sqlite3-lib
        --without-sqlite3-lib=${sqlite3-dir}/lib

extconf failed, exit code 1

Gem files will remain installed in C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/sqlite
3-1.3.10 for inspection.
Results logged to C:/Ruby21-x64/lib/ruby/gems/2.1.0/extensions/x64-mingw32/2.1.0
/sqlite3-1.3.10/gem_make.out

按照我的课本，我已经下载了'sqlite-shell-win32-x86'，创建了'c:\sqlite3'文件夹，在该文件夹中添加了'sqlite3.exe'，并添加了路径'c:\sqlite3'

我该怎么办？我不能启动RoR

增加

他说

checking for sqlite3.h... no
sqlite3.h is missing.

我找到了sqlite3.h（这是在sqlite合并文件夹中），所以我想我下一步要做的是把它放在适当的文件夹中。那在哪里？

---

我把sqlite3.h放在ruby.exe所在的文件夹中，但他仍然说缺少

sqlite3.h。

您缺少gem所需的系统依赖性

sudo apt-get install sqlite3 libsqlite3-dev

---

看看这里，您的机器上还没有安装sqlite3。首先，在机器中安装sqlite3并启动sqlite3的安装gem。它会起作用。我如何安装sqlite3？运行

gem install sqlite3

时失败。

sudo apt-get install sqlite3 libsqlite3-dev