Re: align of local char array seem not work.

[Jim Wilson <wilson at codesourcery dot com>]

Bernd Roesch wrote:
> char buf[256] __attribute__((aligned(16)));
>    printf("%x\n",&buf[0]);
> this short test program give no error or warning and do not align as
> expect.i test with several 68k amigaos compilers (3.4.0 /4.3.2/4.4.0)

Most likely gcc did align it, but one of the assembler, linker, or OS 
program loader did not respect the alignment.  You can try looking at 
the .s file, the .o file, and the executable, to try to determine where 
the failure occurred.

There is a macro MAX_OFILE_ALIGNMENT that you can define in the target 
OS .h file to specify the OS limit.  GCC will then warn if you try to 
align a variable to a value larger than this limit.  See the docs and 
the code in varasm.c that uses it.

Jim