安装 redmine遇到的一些问题
１）执行
bundle install --without development test rmagick
结果报错：
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/usr/bin/ruby1.9.1 extconf.rb
/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- mkmf (LoadError)
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from extconf.rb:1:in `<main>'
Gem files will remain installed in /var/lib/gems/1.9.1/gems/json-1.8.1 for inspection.
Results logged to /var/lib/gems/1.9.1/gems/json-1.8.1/ext/json/ext/generator/gem_make.out
An error occurred while installing json (1.8.1), and Bundler cannot continue.
Make sure that `gem install json -v '1.8.1'` succeeds before bundling.
检查之后， 确认需要安装 ruby1.9.1-dev.
执行：
sudo aptitude install ruby1.9.1-dev之后，重新执行上面的 bundle程序，还是报错，不过这次不同了：
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/usr/bin/ruby1.9.1 extconf.rb
checking for ruby/thread.h... no
checking for rb_thread_blocking_region()... yes
checking for rb_wait_for_single_fd()... yes
checking for rb_hash_dup()... yes
checking for rb_intern3()... yes
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lm... yes
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lz... yes
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lsocket... no
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lnsl... yes
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lmygcc... no
checking for mysql_query() in -lmysqlclient... no
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/var/lib/gems/1.9.1/gems/mysql2-0.3.16/ext/mysql2/mkmf.log/or headers. Check the mkmf.log file for more
details. You may need configuration options.
检查一下 /var/lib/gems/1.9.1/gems/mysql2-0.3.16/ext/mysql2/mkmf.log,发现有：
have_header: checking for ruby/thread.h... -------------------- no需要安装
sudo aptitude install libmysqld-dev之后，再执行bundle 安装程序，就可以了：
Your bundle is complete! Gems in the groups development, test and rmagick were not installed. Use `bundle show [gemname]` to see where a bundled gem is installed.