[Ffmpeg-devel] [patch] strict-aliasing support

[Luca Barbato]

Michael Niedermayer wrote:
> Hi
> 
> not ok, some versions of gcc silently ignore attribute align for variables
> on the stack, while they had no problem aligning double/uint64_t on the
> stack correctly
> 
> 
> [...]
> 

I tested the following testcase on ppc, amd64 and x86 using gcc-4.1.1 on
all of them and gcc-3.4.6 on x86, the value is correct for 16 and 8
alignment. Could someone with a more ancient gcc test this testcase or
equivalents?


#include <stdio.h>

void f()
{
  int tmp[64] __attribute__((aligned(16)));
  printf("align %d\n", __alignof__(tmp));
}

int main()
{
  f();
}

lu


-- 

Luca Barbato

Gentoo/linux Gentoo/PPC
http://dev.gentoo.org/~lu_zero