[Cmake] Error while building VTK 4.2.1 with CMake on Linux

[Joseph Barraud]

Dear all,

I am on Linux Mandrake 9.1 and CMake gives me the following error message 
when I try to configure the makefiles for the building of VTK 4.2.1 (i.e. 
with ccmake, before the display of the list of options):

Determining if the function pthread_create exists in the pthreads failed 
with the following output:
echo "Building object file CheckFunctionExists.o..."
Building object file CheckFunctionExists.o...
gcc -o 
CheckFunctionExists.o          -DCHECK_FUNCTION_EXISTS=pthread_create 
-I/home/joseph/ITK_Stuff/VTK/vtk-build/CMakeTmp    -c 
/usr/local/share/CMake/Modules/CheckFunctionExists.c
echo "Building executable cmTryCompileExec..."
Building executable cmTryCompileExec...
gcc     -rdynamic        -DCHECK_FUNCTION_EXISTS=pthread_create 
CheckFunctionExists.o    -o cmTryCompileExec -rdynamic -lpthreads
/usr//bin/ld: cannot find -lpthreads
collect2: ld returned 1 exit status
gmake: *** [cmTryCompileExec] Erreur 1

I am rather a newbie in Linux but I managed to find that POSIX thread 
libraries are a part of linux for at least four years. I have the latest 
Mandrake and I have installed almost everything concerning development. I 
do have pthread.h in /usr/include and a number of files called 
thread-something in various places.
I have found by surfing on many forums and mailing lists that sometimes 
both -lpthread and -lpthreads (with S) are checked. Could it be a track to 
follow ?


Many thanks for your help,
Joseph.