[Bug preprocessor/33919] New: __BASE_FILE__ does not expand correctly when included from the command line

["gary at intrepid dot com" <gcc-bugzilla at gcc dot gnu dot org>]

If the following line is present in an include file, test_base_file.h:

char *base_file = __BASE_FILE__;

And it is included as follows:

gcc -include test_base_file.h test_base_file.c -o test_base_file

The base file value will be printed as follows:

base file = <command line>

by this main program:

#include <stdio.h>

int
main ()
{
  printf ("base file = %s\n", base_file);
}

If the program is changed ton include test_base_file.h directly
and the -include switch is removed from the command line, the
expected result ("test_base_file.c") is printed.

This behavior was noted in GCC 3.0, and is still present in 4.2.0.
I think that it is likely in the development head version as well,
but have not verified that.


-- 
           Summary: __BASE_FILE__ does not expand correctly when included
                    from the command line
           Product: gcc
           Version: 4.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: preprocessor
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: gary at intrepid dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33919