我正在尝试在Ubuntu上安装Rails，但是我在安装sqlite3-ruby时遇到了问题——它似乎找不到sqlite3.h。我能找到的所有参考资料都表明，问题要么是sqlite3头文件未安装，要么是make无法找到它们。我认为我已经解决了这两个问题，但仍然看到同样的问题。
我真不知道这里发生了什么。也许是版本不匹配？这是使用ruby 1.8.7、sqlite 3.6.22-1、gem 1.3.5和sqlite3-ruby 1.3.1在Ubuntu 10.04.1上的情况。
david@li88-188:~$ sudo apt-get install sqlite3
[...安装成功...]
Setting up sqlite3 (3.6.22-1) ...
david@li88-188:~$ sudo apt-get install libsqlite3-dev
[...安装成功...]
Setting up libsqlite3-dev (3.6.22-1) ...
david@li88-188:~$ sudo gem install sqlite3-ruby
Building native extensions. This could take a while...
ERROR: Error installing sqlite3-ruby:
ERROR: Failed to build gem native extension.
/usr/bin/ruby1.8 extconf.rb
checking for sqlite3.h... no
sqlite3.h is missing. Try 'port install sqlite3 +universal' or 'yum install sqlite3-devel'
*** 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.
[...配置选项等等...]
david@li88-188:~$ cat /var/lib/gems/1.8/gems/sqlite3-ruby-1.3.1/ext/sqlite3/mkmf.log
find_header: checking for sqlite3.h... -------------------- no
"gcc -E -I. -I/usr/lib/ruby/1.8/i486-linux -I. -I/usr/local/include -I/opt/local/include -I/usr/include -D_FILE_OFFSET_BITS=64 -fno-strict-aliasing -g -g -O2 -fPIC -O3 -Wall -Wcast-qual -Wwrite-strings -Wconversion -Wmissing-noreturn -Winline conftest.c -o conftest.i"
checked program was:
/* begin */
1: #include <sqlite3.h>
/* end */
--------------------
/usr/include 在参数列表中。david@li88-188:~$ ls -l /usr/include/sqlite3.h
-rw-r--r-- 1 root root 268351 2010-02-08 03:59 /usr/include/sqlite3.h
请注意文件已经存在。