gem安装memcached在Lion上失败

Question

我想在Mac (10.7.2)上使用memcached宝石(http://fauna.github.com/fauna/memcached/)。Xcode 4.2已经安装。

我安装了memcached，libmemcached由Homebrew安装。

$ brew list -v 
libmemcached 0.50
memcached 1.4.10

我在rvm (ruby版本管理器)中使用ruby 1.9.3-p0。

$ ruby -v 
ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-darwin11.2.0]
$ rvm -v
rvm 1.9.2 by Wayne E. Seguin (wayneeseguin@gmail.com) [https://rvm.beginrescueend.com/]

但是，我无法安装memcached gem (1.3.5)。我按照gits粘贴了安装日志。https://gist.github.com/1395459

一些错误发生在libmemcached的制作过程中。我看到了那个的目录。

$ pwd 
/Users/inohiro/.rvm/gems/ruby-1.9.3-p0/gems/memcached-1.3.5/ext/libmemcached-0.32

配置成功。但是make (全部)失败了。

$ make all
make  all-recursive
Making all in docs
make[2]: Nothing to be done for `all'.
Making all in libmemcached
make  all-am
make[3]: Nothing to be done for `all-am'.
Making all in libmemcachedutil
make[2]: Nothing to be done for `all'.
Making all in support
make[2]: Nothing to be done for `all'.
Making all in clients
/bin/sh ../libtool --tag=CC   --mode=link gcc -std=gnu99 -O3  -pedantic -Wall -Wextra -Wundef -Wshadow  -fdiagnostics-show-option -fvisibility=hidden -Wformat=2  -Wstrict-aliasing -Wstrict-prototypes -Wmissing-prototypes -Wredundant-decls -Wmissing-declarations -Wcast-align -Wswitch-default -Wswitch-enum -Wwrite-strings    -D_THREAD_SAFE   -rpath /usr/local/lib/libmemcached -lsasl2 -L/usr/local/lib -o memcat memcat.o libutilities.la ../libmemcached/libmemcached.la 
libtool: link: gcc -std=gnu99 -O3 -pedantic -Wall -Wextra -Wundef -Wshadow -fdiagnostics-show-option -fvisibility=hidden -Wformat=2 -Wstrict-aliasing -Wstrict-prototypes -Wmissing-prototypes -Wredundant-decls -Wmissing-declarations -Wcast-align -Wswitch-default -Wswitch-enum -Wwrite-strings -D_THREAD_SAFE -o .libs/memcat memcat.o  -L/usr/local/lib ./.libs/libutilities.a ../libmemcached/.libs/libmemcached.dylib -lsasl2
Undefined symbols for architecture x86_64:
  "_memcached_create", referenced from:
      _main in memcat.o
  "_memcached_behavior_set", referenced from:
      _main in memcat.o
      _process_hash_option in libutilities.a(utilities.o)
  "_memcached_get", referenced from:
      _main in memcat.o
  "_memcached_free", referenced from:
      _main in memcat.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
make[2]: *** [memcat] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2

这里有配置和libmemcached的完整日志。https://gist.github.com/1395470

请告诉我如何将memcached宝石安装到Lion :/

Postscript-1

我试过"brew链接memcached“。但是返回一个错误。我该怎么办？

$ brew link memcached 
Linking /usr/local/Cellar/memcached/1.4.10... 
Error: Cannot link memcached
Another version is already linked: /usr/local/Cellar/memcached/1.4.10

Postscript-2

我尝试了删除/usr/local/c业力/memcached/。并运行'brew链接memcached'，但得到以下错误。

$ rm -rf memcached
$ brew link memcached 
Error: No such keg: /usr/local/Cellar/memcached

Answer 1

这样做：

ls -l /usr/local/include/memcached
lrwxr-xr-x  1 root  staff  43 Jul 18 14:17 /usr/local/include/memcached -> ../Cellar/memcached/1.4.5/include/memcached

您需要先删除这个旧链接：

sudo rm /usr/local/include/memcached

然后再尝试brew link memcached

您可能还想这样做：

Installed memcached via homebrew, how to start and stop server?

Answer 2

我认为问题是gcc找不到由brew安装的memcached库。

尝试运行brew link memcached，然后再次运行gem install memcached。