DATA_ALIGNMENT vs. DECL_USER_ALIGNMENT

[Ulrich Weigand]

Geoff Keating wrote:

> I'd consider this a bug *somewhere*.  I'd think that if the Ada
> frontend is going to do this, then in the C sources the variables need
> to be marked with the appropriate alignment.

If I use this patch in addition to the s390 backend fix,
Ada bootstrap goes through on 64-bit:

Index: gcc/ada/bindgen.adb
===================================================================
RCS file: /cvs/gcc/gcc/gcc/ada/bindgen.adb,v
retrieving revision 1.9
diff -c -p -r1.9 bindgen.adb
*** gcc/ada/bindgen.adb	15 Nov 2002 01:45:29 -0000	1.9
--- gcc/ada/bindgen.adb	10 Apr 2003 02:20:56 -0000
*************** package body Bindgen is
*** 485,491 ****
  
           begin
              if U.Set_Elab_Entity then
!                Set_String ("   extern char ");
                 Get_Name_String (U.Uname);
                 Set_Unit_Name;
                 Set_String ("_E;");
--- 485,491 ----
  
           begin
              if U.Set_Elab_Entity then
!                Set_String ("   extern char __attribute__((__aligned__(1))) ");
                 Get_Name_String (U.Uname);
                 Set_Unit_Name;
                 Set_String ("_E;");


I'm not sure whether this is the preferred fix; in particular
I don't understand why those variables need to have forced 
alignment in the first place ...

Bye,
Ulrich

-- 
  Dr. Ulrich Weigand
  weigand@informatik.uni-erlangen.de