Alignment problems with MIPS cross-compiler

[Roy Franz]

Hello,

I am having problems with the aligned attribute on a gcc 3.2.1
cross compiler for MIPS.  (running on x86 linux) I am not sure if this is
a known (but undocumented) limitation of the MIPS crosscompiler or is
really a bug.

  I specify the aligned attribute on a global variable, but the variable 
is not aligned.  The assembly file does not specify the alignement, nor 
is it present in the .o elf file.  The same program works fine when 
compiled on the native gcc (GCC) 3.2.3 20030316 (Debian prerelease) 
compiler.

In the MIPS case the alignment is not specified in the assembly file,
whereas for x86 it is specified.

Is this a bug or a known limitation?  Any help would be appreciated.

(Please CC me as I am not subscribed, but I will also be checking the 
archives.)
Thanks,
Roy


#include <stdio.h>

__attribute__ ((__aligned__(256))) int aligned_int;

main()
{
     printf("aligned_int: %p\n", &aligned_int);
}


on x86 I get the following in the .s file:

         .comm   aligned_int,4,256
and the following in the elf file  (from read_elf --symbols)
     8: 00000100     4 OBJECT  GLOBAL DEFAULT  COM aligned_int


When compiling for MIPS (compiling for mips64 ) I get:
(I tried compiling 32 bit code and had the same issues.)
        .comm   aligned_int,4
and
    11: 0000000000000004     4 OBJECT  GLOBAL DEFAULT  COM aligned_int