[OpenMP] use -fopenmp in a new front end

[charfi asma]

Hello,

I built a new gcc front end
I would like to use the -fopenmp options when compiling my source file
I could use the C front end options like -S -fdump-tree-all -O*, .... but when I 

use -fopenmp I get this error:

uml1: warning: command line option ‘-fopenmp’ is valid for 
C/C++/Fortran/ObjC/ObjC++ but not for  [enabled by default]

this is my lang-specs.h: 

{".uml", "@uml", 0, 1, 0},
{"@uml", "uml1 %i %(invoke_as)", 0, 1, 0},
{"@uml",  "uml1 %i %(cc1_options) %{!fsyntax-only:%(invoke_as)}",
    0, 1, 0},

I added the fopenmp option to my lang.opt file as fortran fe does (as suggested 
in ...........)

but I always get the same warning expect that my fe language name is added to 
the list of fe 

that enable the use of fopenmp

uml1: warning: command line option ‘-fopenmp’ is valid for 
C/C++/Fortran/ObjC/ObjC++/uml but not for  [enabled by default]

there is also an error in my front end comes from the compiler implementation 
itself.
In my new front end, I tried to build the Generic form correspending to #pragma 
omp parallel

I get the gimplified expression as provided by c++ front end
here is my gimple 

main ()
gimple_bind <
  <unnamed-signed:32> D.28;
  struct MyClass x;

  gimple_omp_parallel <
    BODY <
      gimple_bind <
        gimple_call <MyOperation1, NULL, &x>
        gimple_call <MyOperation2, NULL, &x>
      >
    >
    CLAUSES < shared(x) >, NULL, NULL
  >
  gimple_assign <integer_cst, D.28, 0, NULL>
  gimple_return <D.28>
>


MyOperation2 (struct MyClass * this)
gimple_bind <
  gimple_assign <integer_cst, this->MyAttribute2, 15, NULL>
  gimple_return <NULL>
>


MyOperation1 (struct MyClass * this)
gimple_bind <
  gimple_assign <integer_cst, this->MyAttribute1, 10, NULL>
  gimple_return <NULL>
>



but it does not contain the built-in function (as gimple generated from c++ fe)

<built-in> (struct .omp_data_s.0 * .omp_data_i)
{
  struct MyClass c [value-expr: *.omp_data_i->c];
  struct MyClass * D.1788;
  struct MyClass * D.1787;
  struct MyClass * D.1786;
  struct MyClass * D.1785;

<bb 5>:

<bb 3>:
  gimple_assign <component_ref, D.1785, .omp_data_i->c, NULL>
....
}

one of the reason is that my flag_openmp is always null, even if I specify 
-fopenmp while compiling.
i,e: when my front end calls the execute_lower_omp(void) it does nothing
execute_lower_omp (void)
{
  gimple_seq body;

  /* This pass always runs, to provide PROP_gimple_lomp.
     But there is nothing to do unless -fopenmp is given.  */
  if (flag_openmp == 0)
    return 0;
....
}

any idea to change fe flag_openmp value ?  

thank you very much.

Asma