Re: [avr-gcc-list] Why EthNut2.4.2 should use -Os instead of -O3?

[Harald Kipp]

The Ethernut RTOS inherits an adventurous
construction from the original Liquorice
source code:

static thread_switch()
{
  ...
  asm("label:");  /* initial thread entry */
  ...
}

create_thread()
{
  ...
  asm("jmp label");
  ...
}

When using -o3 with AVRGCC 3.2, the compiler
makes thread_switch() inline. This makes 'label'
ambiguous.

Harald

avr-gcc-list at http://avr1.org