Author: Sun Wen-chang <sunwch@nankai.edu.cn>
Based on "cmap" package by Vladimir Volovich <vvv@vsu.ru>.

With this package, Chinese PDF generated by PDFTeX (NOT FOR LaTeX,
DVIPS, DVIPDFm, etc.) may be searched for Chinese text, and may be
copied Chinese text from, when read in Adobe Reader. GB2312, GBK,
BIG5, BIG5+, JIS and UTF-8 are supported. (Korean is supported only
in UTF-8 so far.)

Original version from http://lsec.cc.ac.cn/cgi-bin/viewcvs.cgi/cct/ccmap/
The file "makecmap.tex" has been slightly modified for FreeBSD.

Usage: use it with CJK:

\documentclass[12pt]{article}
\usepackage{ccmap}
\usepackage{CJK}
\begin{document}
\begin{CJK}{GB}{song}
...


