【发布时间】：2014-06-17 07:58:43
【问题描述】：
Gemfile 上的 ruby 版本是 v2.1.2，rails 版本是 4.1.1
ruby '2.1.2'
gem 'rails', '4.1.1'
还有这样的。
gem "memcachier"
gem 'dalli'
我已经添加了 memcachier 插件。 但是当我将我的 rails 代码部署到 heroku 时，我遇到了这个错误。
Installing memcachier 0.0.2
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
/tmp/build_af6f5b6f-490c-4015-8729-49c519b4a44c/vendor/ruby-2.1.2/bin/ruby extconf.rb
checking for sasl/sasl.h... no
Please install SASL to continue. The package is called libsasl2-dev on Ubuntu and cyrus-sasl on Gentoo.
*** 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=/tmp/build_af6f5b6f-490c-4015-8729-49c519b4a44c/vendor/ruby-2.1.2/bin/ruby
extconf failed, exit code 1
Gem files will remain installed in /tmp/build_af6f5b6f-490c-4015-8729-49c519b4a44c/vendor/bundle/ruby/2.1.0/gems/memcached-1.8.0 for inspection.
Results logged to /tmp/build_af6f5b6f-490c-4015-8729-49c519b4a44c/vendor/bundle/ruby/2.1.0/extensions/x86_64-linux/2.1.0-static/memcached-1.8.0/gem_make.out
Installing newrelic_rpm 3.8.1.221
Installing kgio 2.9.2
An error occurred while installing memcached (1.8.0), and Bundler cannot
continue.
Make sure that `gem install memcached -v '1.8.0'` succeeds before bundling.
!
! Failed to install gems via Bundler.
!
! Push rejected, failed to compile Ruby app
这是什么原因，如何避免？
【问题讨论】：
标签： ruby-on-rails heroku deployment memcached memcachier