install

xgrafix 是PTSG模拟程序中的图形截面库 改版本是最新版本

Typically one does 

  ./conf-usual
  make
  make install

This puts the files in the standard directories and it
uses double for all real numbers.  If you do not like
the options specified by conf-usual, then do

  ./configure --help

to see what options are possible and choose as you wish.