[Bug target/53344] New: Dont' emit an assembler warning when assembling 3-byte symbols

["gjl at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53344

             Bug #: 53344
           Summary: Dont' emit an assembler warning when assembling 3-byte
                    symbols
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: gjl@gcc.gnu.org
            Target: avr


avr-gcc compiles

extern const __pgmx char foo;
const __pgmx void * pointer = &foo;

to the following assembler code:

.global    pointer
    .data
    .type    pointer, @object
    .size    pointer, 3
pointer:
    .word    foo
    .warning    "assembling 24-bit address needs binutils extension for
hh8(foo)"
    .byte    0     ;  hh8(foo)


Rationale is that the needed extension to assemble 3-byte symbols 
   http://sourceware.org/bugzilla/show_bug.cgi?id=13503
is only available since binutils 2.23

The above assembler code should be changed to 

pointer:
    .byte    lo8(foo)
    .byte    hi8(foo)
    .byte    hh8(foo)

because the binutils are extended now and can handle this.