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Description of problem:
The following code isn't compiled by gfortran, because of the otherf = otherf/2. with otherf an entry: 

      FUNCTION myfun(x)
      myfun = 2.
      myfun = myfun/2.
      return
      ENTRY otherf(x)
      otherf = 2.
      otherf = otherf/2.
      return
      END

[dumas@chapelle cernlib_work]$ gfortran -c "bug_gfortran_entry_lhs.f" -o truc.o
 In file bug_gfortran_entry_lhs.f:10

      otherf = otherf/2.                                                
                    1
Error: Function 'otherf' requires an argument list at (1)

Notice that there is no issue for normal functions. There is a workaround, use another name for the variable corresponding with the return value and assign it to the entry name just before return.

Version-Release number of selected component (if applicable):
gcc-gfortran-4.0.0-12

How reproducible:
Always

Steps to Reproduce:
1.put an entry name in an expression and try to compile
2.
3.
  

Actual Results:  Error in compilation

Expected Results:  A compilation

Additional info:

I haven't seen that bug in the gcc gfortran bugzilla. Maybe it isn't reported or has been fixed.