制作中文可以拷贝的PDF

本来如果严格按照中文Gentoo wiki上的这篇文章来做的话应该是没有问题的，这篇文章使用的字符集是GBK。
不过我曾经按照及永刚大哥的一篇文章配置过UTF-8环境下的teTeX。
前者的主要文件放在/usr/local/share里，后者放在$HOME里。有些文件是重复的，这就有个取舍的问题，到底用的是哪个。

生成可以拷贝中文的pdf要用dvipdfmx，这个都有共识。
可是还要配置两个文件，一个是UGBK.sfd，一个是cid-x.map。
这次就栽在了后一个文件上，没有搞清楚用的是哪个。

我用strace分析了dvipdfmx运行时打开的配置文件，发现dvipdfmx依据的是$HOME里的cid-x.map。
strace dvipdfmx test.dvi 2>&1 | grep cid-x.map

然后我又发现了FerretL的这篇文章，原来有个命令可以查的
kpsewhich cid-x.map

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