date_calc on Mac OS X

I'm trying to install date_calc on Mac OS X (Snow Leopard), but I'm having some problems.

I've downloa开发者_运维问答ded date_calc 5.4 and I've tried to do the following:

sudo perl Makefile.PL

I then tried:

sudo make

But this returns,

make: *** No rule to make target/System/Library/Perl/5.10.0/darwin-thread-multi-2level/CORE/config.h', needed by Makefile'. Stop.

Does anyone know what this means?

Thanks

From what I could gather, it seems that this is an issue with Xcode not being installed, or being out of date.

Try (re)installing Xcode. Xcode 3 will probably be sufficient if you don't want to pay the few bucks for Xcode 4. The link is located in the bottom right of the page.