mac 下安装 lua环境

==> Downloading http://www.lua.org/ftp/lua-5.2.3.tar.gz
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==> Downloading http://luajit.org/patches/lua-5.2.0-advanced_readline.patch
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==> Downloading http://lua-users.org/files/wiki_insecure/power_patches/5.2/lua-5
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==> Patching
patching file Makefile
patching file src/Makefile
patching file src/lua.c
Hunk #1 succeeded at 231 (offset -5 lines).
Hunk #2 succeeded at 559 (offset -4 lines).
Hunk #3 succeeded at 575 (offset -4 lines).
patching file src/lua.c
==> make macosx INSTALL_TOP=/usr/local/Cellar/lua/5.2.3_1 INSTALL_MAN=/usr/local
==> make install INSTALL_TOP=/usr/local/Cellar/lua/5.2.3_1 INSTALL_MAN=/usr/loca
Error: The `brew link` step did not complete successfully
The formula built, but is not symlinked into /usr/local
Could not symlink lib/liblua.5.2.3.dylib
/usr/local/lib is not writable.

You can try again using:
  brew link lua
==> Summary
mac 下安装 lua环境
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原文地址：http://blog.csdn.net/freewebsys/article/details/43231751