[Bug target/18552] New: Annoying warning with -ffunction-sections -g

["bernie at develer dot com" <gcc-bugzilla at gcc dot gnu dot org>]

When building with both -ffunction-sections and
-g, the compiler outputs an invalid warning for
each compiled file:

  drv/timer.c:1: warning: -ffunction-sections may affect debugging on some targets

The code printing this is here:

--- gcc/toplev.c ---
#ifndef OBJECT_FORMAT_ELF
  if (flag_function_sections && write_symbols != NO_DEBUG)
    warning ("-ffunction-sections may affect debugging on some targets");
#endif
--- gcc/toplev.c ---

A possible fix could be adding elfos.h to the tm_file
list for the avr target in config.gcc, which may also
lead to simplifications in some parts of config/avr.h.

-- 
           Summary: Annoying warning with -ffunction-sections -g
           Product: gcc
           Version: 3.4.4
            Status: UNCONFIRMED
          Keywords: diagnostic
          Severity: normal
          Priority: P2
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: bernie at develer dot com
                CC: gcc-bugs at gcc dot gnu dot org
  GCC host triplet: avr


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18552