在带有 rvm 和 ruby​​ 1.9.3 的 Mac Lion 上构建 mysql2 gem 时出错

Question

为了在 mac 上构建 ruby​​ 1.9，我必须安装 gcc 4.6。 Rails 和一堆其他的 gem 构建得很好。安装 mysql 或 mysql2 让我各种心痛。

rubygems> env ARCHFLAGS="-arch x86_64" gem install mysql2 -- --with-mysql-dir=/usr/local/mysql --with-mysql-lib=/usr/local/mysql/lib --with-mysql-include=/usr/local/mysql/include --with-mysql-config=/usr/local/mysql/bin/mysql_config
Building native extensions.  This could take a while...
ERROR:  Error installing mysql2:
    ERROR: Failed to build gem native extension.

        /Users/ff/.rvm/rubies/ruby-1.9.3-p0/bin/ruby extconf.rb --with-mysql-dir=/usr/local/mysql --with-mysql-lib=/usr/local/mysql/lib --with-mysql-include=/usr/local/mysql/include --with-mysql-config=/usr/local/mysql/bin/mysql_config
checking for rb_thread_blocking_region()... yes
checking for rb_wait_for_single_fd()... yes
checking for mysql.h... no
checking for mysql/mysql.h... no
-----
mysql.h is missing.  please check your installation of mysql and try again.
-----
*** 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
    --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=/Users/ff/.rvm/rubies/ruby-1.9.3-p0/bin/ruby
    --with-mysql-config


Gem files will remain installed in /Users/ff/.rvm/gems/ruby-1.9.3-p0/gems/mysql2-0.3.11 for inspection.
Results logged to /Users/ff/.rvm/gems/ruby-1.9.3-p0/gems/mysql2-0.3.11/ext/mysql2/gem_make.out

当我查看 mkmf.log 文件时，我看到：

---

have_header: checking for mysql.h... -------------------- no

"/opt/local/bin/gcc-mp-4.6 -E -I/Users/ff/.rvm/rubies/ruby-1.9.3-p0/include/ruby-1.9.1/x86_64-darwin11.2.0 -I/Users/ff/.rvm/rubies/ruby-1.9.3-p0/include/ruby-1.9.1/ruby/backward -I/Users/ff/.rvm/rubies/ruby-1.9.3-p0/include/ruby-1.9.1 -I. -I/Users/ff/.rvm/usr/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -I/usr/local/mysql/include -Os -arch i386 -fno-common  -O3 -ggdb -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration  -fno-common -pipe  conftest.c -o conftest.i"
gcc-mp-4.6: error: i386: No such file or directory
gcc-mp-4.6: error: unrecognized option '-arch'
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: #include <mysql.h>
/* end */

所以基本上似乎不支持 -arch 标志。任何人都知道这些编译选项是在哪里提供的，所以我可以删除这个标志？或任何其他解决方案....谢谢

Answer 1

我尝试了此处发布的所有解决方案，但并不幸运。我通过自制软件重新安装了 mysql 几次，但仍然没有运气。然后我发现了一篇包含解决方案的博客文章。

我在/usr/local/Cellar/mysql/5.6.12/bin 中编辑了mysql_config 文件，并删除了cflags 和cxxflags 的W 编译器选项-Wno-null-conversion 和-Wno-unused-private-field。

这解决了gem install mysql2 的问题。

参考：randomactsofsentience.com/2013/05/gem-install-mysql2-missing-mysqlh-on-os

Answer 2

在安装 Rails 时单独安装 MySQL。我尝试用 rvm 安装它，但它不起作用。

看看这个article它应该可以帮助你安装mysql

如果失败，这里是另一个solution。两者都为我工作。

Answer 3

好吧，既然您生活在边缘... -arch 标志现在应该是 -m64... 所以您可能需要更新您的 mysql_config 以反映该更改，例如在我的第 128 行替换：

-arch x86_64

与

-m64

那么，

gem install mysql2 

Answer 4

构建 gem 原生扩展失败与 gem 依赖无关，而是与应用程序未完全安装有关。

我遇到了同样的问题，这应该可以解决问题：

sudo apt-get install libmysql-ruby libmysqlclient-dev