no rule to make target 'o3', Stop

[ymchiQQ]

I had followed all steps in FAQ and Quick Start, but I got the message:
no rule to make target 'o3', Stop

Other simple question:
What path did you install the libdnn? (I installed it in /usr/local/cuda-6.5.)
Would it make some errors happen?

[poweic]

libdnn is not a library you need sudo. It's a simple and lightweight library just like your programming homework. You can put it anywhere. There's no need to be in /usr/local/....

I guess you don't have the permission in /usr/local/, which cause this problem. Try this:

cd ~/ && git clone https://github.com/botonchou/libdnn.git && cd libdnn/ && ./install.sh

[ymchiQQ]

I had sudo permission, and I change the permission of folder. But I still got the same results, I will check other details. thanks!

[poweic]

In Makefile line 46, 47

o3: CFLAGS+=-O3
o3: all

So it's a little bit weird that you got no rule to make target 'o3', Stop.
Tell me when you fix it.

[ymchiQQ]

I solved the problem, here is what I did:

1. reinstall the OS to 14.04 desktop (original is 14.04 server).
2. change g++ version to 4.6

Thanks for your kind help!