Use [TEA], but perhaps also see "[Hello World as a C extension]".

[aricb] I hope someone will fill in a few more details here.  Some questions I have are:

What are the popular compilers used for Tcl extensions on OS X?  What Mac-specific compiler arguments should an extension writer be familiar with?

The [MacOS X] page mentions that Tk can be compiled to have a native Aqua look and feel, or it can be compiled to use X-Windows.  Does an extension writer need to worry about this distinction, and if so, what does one do differently in each case?