macox下编译snappy静态库

1. 源码地址：https://github.com/google/snappy
   下载 git clone https://github.com/google/snappy
2. 编译
   
   • 进入snappy源码目录，执行命令： ./autogen.sh
     报错 “./autogen.sh: line 3: aclocal: command not found”
     通过http://superuser.com/questions/657925/cygwin-rtorrent-installing-libtorrent-autogen-sh-aclocal-not-found这篇文章得知，系统没有安装automake，
     执行命令： breaw install automake
     报错“-bash: brew: command not found”
     安装 brew
     执行 命令：ruby -e "$(curl -f sSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
     
     然后 安装 automake，执行命令： brew install automake
     执行命令：./autogen.sh
     报错：“./autogen.sh: line 5: libtoolize: command not found”
     安装 libtool，执行命令：brew install libtool
     继续执行命令：./autogen.sh
     报错“./autogen.sh: line 5: libtoolize: command not found”
     通过这篇文章：http://stackoverflow.com/questions/15448582/installed-libtool-but-libtoolize-not-found
     我是在修改./autogen.sh 把第五行改成 glibtoolize --copy
     网上也有这样改得（我没试）:

case `uname` in Darwin*) glibtoolize --copy ;;
  *) libtoolize --copy ;; esac 

执行命令：./autogen.sh
报错：“configure.ac:42: error: possibly undefined macro: AC_DEFINE
If this token and others are legitimate, please use m4_pattern_allow.
See the Autoconf documentation.
configure.ac:44: error: possibly undefined macro: AC_MSG_FAILURE”
通过这篇文章http://stackoverflow.com/questions/8811381/possibly-undefined-macro-ac-msg-error
我安装了pkgconfig，执行命令：brew install pkgconfig
报错“rm: autom4te.cache/output.0: Permission denied
rm: autom4te.cache/output.1: Permission denied
rm: autom4te.cache/requests: Permission denied
rm: autom4te.cache/traces.0: Permission denied
rm: autom4te.cache/traces.1: Permission denied
rm: autom4te.cache: Directory not empty
”
改成sudo ,执行命令：sudo ./autogen.sh
- 执行configure ,执行命令：./configure
- 执行make，执行命令：make
- 执行make install，执行命令：make install
3. 验证

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