How to build applications for uClinux

Dear Ken !

thank you very much for your answer !

Please help me this problem:

We are using altera cyclone1c12 eval (using on-board Flash chip)...., NIOS IDE 5.0

How to write a file When running a C application in uClinux ?

fp=fopen(myfile,"r") works well but an error occurs when I use fp=fopen(myfile,"w")

Please follow the link to see the images :

problem image (http://img.photobucket.com/albums/v604/bebechance/problem.jpg)

http://img.photobucket.com/albums/v604/bebechance/problem.jpg

There are 2 possible problems for this error :

1. linux_time_limited.sof doesn’t support writing file

2. The program is running on sdram but the file (output_filename) is written to Flash. We already knew that we cannot write to Flash by C functions such as fprintf ,fwrite ,…. To do that , we must use some scripts : nios2-flash-programmer , ……

Is this related to RO readonly.....?

If it is the reason , then the uClinux FileSystem is useless.

What do you think ?