Using the #line directive with gfortran

[marco restelli <mrestelli at gmail dot com>]

Hi all,
   I am confused by the treatment of the #line directive by gfortran.

Suppose that I have two files:

file_a.xyz:

program test
 implicit none
 integer :: i
<some lines consumed by a preprocessor>
<some lines consumed by a preprocessor>
<some lines consumed by a preprocessor>
<some lines consumed by a preprocessor>
 j = 3
end program
! comments
! other comments
! ...
! more comments


file_b.F90

program test
 implicit none
 integer :: i
#line 8 "file_a.xyz"
 j = 3
end program
! comments
! other comments
! ...
! more comments


The idea is that file_b.F90 comes from a preprocessing of file_a.xyz,
so all the compiler diagnostics should be referred to file_a.xyz.
Compiling file_b.F90 I see

$ gfortran -c file_b.F90 -o file_b.o
file_b.F90:8:2:

 ! other comments
  1
Error: Symbol ‘j’ at (1) has no IMPLICIT type


So it seems that only the line number "8" is used by gfortran, but not
the file name: both the file name and the source line in fact are
referring to file_b.F90. I would like a message like

$ gfortran -c file_b.F90 -o file_b.o
file_a.xyz:8:2:

 j = 3
  1
Error: Symbol ‘j’ at (1) has no IMPLICIT type

(By the way, gcc on C code behaves like I would expect, showing the
name and the source line of the original file file_a.xyz.)

Is there a way to have this output from gfortran?

Thank,
   Marco