我在我的mac上的终端中安装mysql2但是有一条错误消息。有谁知道如何解决这个问题？非常感谢！
我的osx版本是10.9并安装了Xcode和命令行工具。
joe@~ $sudo gem install mysql2
Password:
Building native extensions. This could take a while...
ERROR: Error installing mysql2:
ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb
checking for ruby/thread.h... yes
checking for rb_thread_call_without_gvl() in ruby/thread.h... yes
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
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Using mysql_config at /usr/local/bin/mysql_config
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checking for mysql.h... yes
checking for errmsg.h... yes
checking for mysqld_error.h... yes
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Setting rpath to /usr/local/Cellar/mysql/5.6.17/lib
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creating Makefile
make "DESTDIR="
compiling client.c
compiling infile.c
compiling mysql2_ext.c
compiling result.c
linking shared-object mysql2/mysql2.bundle
clang: error: unknown argument: '-multiply_definedsuppress' [-Wunused-command-line-argument-hard-error-in-future]
clang: note: this will be a hard error (cannot be downgraded to a warning) in the future
make: *** [mysql2.bundle] Error 1
Gem files will remain installed in /Library/Ruby/Gems/2.0.0/gems/mysql2-0.3.15 for inspection.
Results logged to /Library/Ruby/Gems/2.0.0/gems/mysql2-0.3.15/ext/mysql2/gem_make.out