Re: [avr-libc-dev] [RFT] [PATCH] New linker optimizations.

[Björn Haase]

Bernd Trog wrote on Sonntag, 16. Oktober 2005 12:30 :
> On Sun, 16 Oct 2005, Björn Haase wrote:
> Now I get:
>
> ../../src/bfd/elf32-avr.c: In function `elf32_avr_relax_section':
> ../../src/bfd/elf32-avr.c:1269: parse error before `int'
>
> I think my old-fashioned gcc-2.95 doesn't like your
> new C(99?) style. (gcc-4.0.1 works OK here)
The difficulty probably is that I made the mistake to define a new variable 
not at the beginning of a {...} block but in the center. Gcc3 does not 
complain about this. Changing the code segment such that it reads

              /* Shrinking the code size makes the gaps larger in the
                  case of wrap-arounds.  So we use a heuristical safety
                  margin to avoid that during relax the distance gets
                  again too large for the short jumps.  Let's assume
                  a typical code-size reduction due to relax for a
                  16k device of 600 bytes.  So let's use twice the
                  typical value as safety margin.  */

               int rgap;
               int safety_margin;

               int assumed_shrink = 600;
               if (avr_pc_wrap_around > 0x4000)
                 assumed_shrink = 900;

               safety_margin = 2 * assumed_shrink;

should solve the issue.

Bjoern.