网上找的：
Under your Quartus II folder, go to bin->cygwin->bin folder, select the following files in the list below and then right-click and choose Properties. Under the Compatibility tab, check“Run this program in compatibility mode for:” and choose “Windows XP (Service Pack 2)”. Check “Run this program as an administrator”, as well. Here is the list of files that you can select to change their compatibility mode under the Quartus II->bin->cygwin->bin folder:
1. Make.exe
2. Sh.exe
3. Echo.exe
4. Cygstart.exe
5. MakeInfo.exe
6. Perl.exe
7. Collect2.exe (under nios2edsbinnios2-gnutools H-i686-pc-cygwinlibexecgccnios2-elf3.4.6)
8. Nios2-elf-g++.exe (under nios2edsbinnios2-gnutools H-i686-pc-cygwinbin)
By doing the steps mentioned above, the success rate of building a project in NIOS II IDE 9.1 will be increased to above 90%.
另外，若编译niosii的时候不断出现下面的东西，很奇怪的是不断点击：关闭程序就可以编译过去了