Mac 10.7-安装 xcode 后无法使用 make 实用程序

Question

我正在尝试安装从 CPAN 手动下载的 perl 模块，但遇到了困难。

$perl Makefile.PL 
Welcome to JSON (v.2.53)
=============================
If you install JSON::XS v.2.27, it makes JSON faster.

 ************************** CAUTION **************************
 * This is 'JSON version 2' and there are many differences   *
 * to version 1.xx                                           *
 * Please check your applications useing old version.        *
 *   See to 'INCOMPATIBLE CHANGES TO OLD VERSION' and 'TIPS' *
 *************************************************************


Writing Makefile for JSON
$make
make: *** No rule to make target `/System/Library/Perl/5.12/darwin-thread-multi-2level/CORE/config.h', needed by `Makefile'.  Stop.

有人遇到了同样的问题，但我无法让他的解决方案对我有用。

https://stackoverflow.com/questions/6793499/perl-config-h-needed-by-makefile-problem-after-osx-lion-upgrade

我已安装 Xcode 和命令行工具包。输入“which make”输出：

$which make
/Applications/Xcode.app/Contents/Developer/usr/bin/make

perl 输出：

$which perl
/usr/bin/perl

我做错了什么？这是 Perl 的问题吗？