Building the SDK 4.1 /usr/bin/ld: cannot find -lcuda

I can build the first few code samples, but it dies when I get to deviceQuery.
As far as I can tell, there is a cuda library missing. True?
I’m not finding any libcuda.so file. Should there be one?
Do I need to build it, or should it have been installed?

Could someone give me some guidance?

The details:

rrob@ubuntu:~/NVIDIA_GPU_Computing_SDK/C/src/deviceQuery$ echo $PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/cuda/bin

rrob@ubuntu:~/NVIDIA_GPU_Computing_SDK/C/src/deviceQuery$ echo $LD_LIBRARY_PATH
/usr/local/cuda/lib64:/usr/local/cuda/lib:

rrob@ubuntu:~/NVIDIA_GPU_Computing_SDK/C/src/deviceQuery$ gcc --version
gcc (Ubuntu/Linaro 4.5.2-8ubuntu4) 4.5.2
Copyright © 2010 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

rrob@ubuntu:~/NVIDIA_GPU_Computing_SDK/C/src/deviceQuery$ cat /proc/driver/nvidia/version
NVRM version: NVIDIA UNIX x86_64 Kernel Module 295.20 Mon Feb 6 21:07:30 PST 2012
GCC version: gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu4)

rrob@ubuntu:~/NVIDIA_GPU_Computing_SDK/C/src/deviceQuery$ uname -m && cat /etc/*release
x86_64
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=11.04
DISTRIB_CODENAME=natty
DISTRIB_DESCRIPTION=“Ubuntu 11.04”

rrob@ubuntu:~/NVIDIA_GPU_Computing_SDK/C/src/deviceQuery$ make
/usr/bin/ld: cannot find -lcuda
collect2: ld returned 1 exit status
make: *** […/…/bin/linux/release/deviceQuery] Error 1

The last line of the make file is generating the error:

Add source files here

EXECUTABLE := deviceQuery

Cuda source files (compiled with cudacc)

CUFILES :=

C/C++ source files (compiled with gcc / c++)

CCFILES := deviceQuery.cpp

Do not link with CUTIL

OMIT_CUTIL_LIB := 1

################################################################################

Rules and targets

include …/…/common/common.mk

LIB += -lcuda

Are the warnings in this of any concern?

rrob@ubuntu:~/NVIDIA_GPU_Computing_SDK/C$ ldconfig -v | grep cuda
/sbin/ldconfig.real: Path /lib/x86_64-linux-gnu' given more than once /sbin/ldconfig.real: Path /usr/lib/x86_64-linux-gnu’ given more than once
/usr/local/cuda/lib64:
libcudart.so.4 -> libcudart.so.4.1.28
/usr/local/cuda/lib:
libcudart.so.4 -> libcudart.so.4.1.28
libcuda.so.1 -> libcuda.so.295.20
libcuda.so.1 -> libcuda.so.295.20

libicudata.so.44 -> libicudata.so.44.2

http://forums.nvidia.com/index.php?showtopic=224718