[omp] can not find omp.h

[charfi asma]

I tried to compile c++ program with openMP directives, but the compiler (gcc version 4.4.2)
can not find omp.h
I tried to install libgomp1:

1) rpm -ivh libgomp1-4.4.2-5mnb2.i586.rpm 
Préparation...              ########################################### [100%]
    paquetage libgomp1-4.4.2-5mnb2.i586 already installed

2) locate libgomp
/usr/lib/libgomp.so.1
/usr/lib/libgomp.so.1.0.0

but I can not find omp.h in /usr/include

any one has an idea about this problem, I waist alot of time searching in internet for a solution but in vain

thank you for your help

Asma