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Quartus 8.1在Linux上的安装破解方法

学习SOPC，自然会用到Quartus II和NIOS，这两个软件似乎是java编写的，所以都有linux版。
首先，到官方网站下载 Quartus II Subscription Edition Software v8.1(Includes MegaCore IP Library) 和 Nios II Embedded Design Suite 这两个软件，下载时需要注册，也可以选择 Get One-Time Access 取得一次下载权限。
然后，解压两个tar包，分别以root权限运行install脚本，注意运行此脚本需要 csh 。
最后，运行 安装目录/quartus/bin/quartus 即可。
我在 Arch Linux 64bit 下运行会出现段错误，在 Ubuntu 8.10 32bit 下运行正常，可能是64位问题，也可能是 csh 问题，不过总算是能用了。

注册时，licence.dat可以用windows下的，对于没有licence的同学，可以参照这个：

How to crack Quartus for linux:
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cd /linux
cp libsys_cpt.so libsys_cpt.so.bak

then run gdb:
gdb> file libsys_cpt.so
gdb> info function l_pubkey_verify

Note the resulting address (for Quartus 7.2 it was 0x000c617b)

quit gdb, then open libsys_cpt.so using a hex editor, then go to the address
that you got from gdb and replace the 3 bytes starting at that address with
those bytes: 31 C0 C3

Alternatively one can get the address of 'l_pubkey_verify' function using the
command:
nm libsys_cpt.so | grep l_pubkey_verify

Now regular quartus tool flow can work, except for the Design Space Explorer,
to get the Design Space Explorer working do the following:
* Note the first few bytes (8 or more) in the 'l_pubkey_verify' function of the
original libsys_cpt.so, and search for those bytes in quartus_sh (using a hex
editor). I found that the number of bytes to search for (which were 8 for
Quartus 8.0) are the minimum number of bytes which will match only once in
quartus_sh.
* Replace the first 3 bytes with those bytes: 31 C0 C3