preprocessor token "#" doesn't work in gfortran as in gcc, intel-fortran or sun-fortran compiler

[Maik Beckmann]

Hello,

Consider this code
{{{
#include <stdio.h>
#define TO_STR(EXPR) # EXPR
int main() {
  printf("%s\n", TO_STR(bazz));   
  return 0;
}
}}}
Running
  gcc foo.c && ./a.out
gives
  bazz

The fortran version is
{{{
#define TO_STR(EXPR) #EXPR

PROGRAM test
  print *,TO_STR(bazz)
END PROGRAM test
}}}
Running
  ifort -fpp foo.f90 && ./a.out
or
  sunf95 -fpp foo.f90 && ./a.out
gives 
  bazz
as expected.

But 
  gfortran -cpp foo.f90 
chokes with
{{{
foo.f90:4.10:

  print *,#bazz
          1
Error: Expected expression in PRINT statement at (1)
}}}

After some tinkering I came up with 
{{{
#define TO_STR(EXPR) "EXPR"

PROGRAM test
  print *,TO_STR(bazz)
END PROGRAM test
}}}
Running
 gfortran -cpp foo.f90 && ./a.out
gives
 bazz

Why does gfortran -cpp" behave different than gcc or any other fortran compiler 
I have around?  Is this by intention or just a bug?