On 7/26/2013 17:45, JonY wrote:
> On 7/26/2013 13:02, Yaakov (Cygwin/X) wrote:
>> On 2013-07-12 05:33, JonY wrote:
>>> For gcc-4.7.x, struct alignment behavior has changed, -mms-bitfields is
>>> now default, for better MSVC compatibility. This may cause ABI changes
>>> in libraries that expose data structures directly to clients. Workaround
>>> include marking the struct with the gcc_struct attributes.
>>
>> While we're breaking ABI anyway, would you be able to enable SEH for
>> x86_64-w64-mingw32 *now* so that I don't have to rebuild mingw64
>> packages YA in the near future?
>>
>>
> 
> IIRC SEH is only available in gcc 4.8, I will do this when I push 4.8 to
> 32bit, which should be soon after a gcc rebuild for 64bit.
> 

Looks like 4.8 for Cygwin 32bit isn't happening soon. GCC ICE'ed in
libgcc in a simple function:


void
__enable_execute_stack (void *addr)
{
  MEMORY_BASIC_INFORMATION b;

  if (!VirtualQuery (addr, &b, sizeof(b)))
    abort ();
  VirtualProtect (b.BaseAddress, b.RegionSize, PAGE_EXECUTE_READWRITE,
                  &b.Protect);
}



enable-execute-stack.c: In function ‘__enable_execute_stack’:
enable-execute-stack.c:38:1: error: unrecognizable insn:
 }
 ^
(insn 10 9 11 2 (set (reg:SI 64)
        (symbol_ref:SI ("VirtualQuery@12") [flags 0x441] <function_decl
0xffac1980 VirtualQuery>)) enable-execute-stack.c:34 -1
     (nil))
enable-execute-stack.c:38:1: internal compiler error: in extract_insn,
at recog.c:2150

enable-execute-stack.c:38:1: internal compiler error: Aborted
xgcc: internal compiler error: Aborted (program cc1)