Carsten Sørensen wrote:
On 10/09/2007, Pedro Alves <[EMAIL PROTECTED]> wrote:
Outch! Looks like a bug alright.
It seems long long's in structures require 64-bit alignment. You should be
able to work around it for now by introducing a dummy before f2.
It does. From the documentation
http://msdn2.microsoft.com/en-us/library/ms860980.aspx
"The __alignof value is the same as the value for sizeof for basic
types." (BTW, nice thing to keep in mind when porting code that uses
__alignof)
Thanks for the pointer. Somehow I missed that.
I've built a cc1.exe with the attached patch applied, and I now get the
same alignments as the OP reported MSVC choses. I'm doing a full
gcc build now.
The patch also forces 64-bit alignment on doubles, but I haven't
tested it yet - bonus points if someone tests it and compares it to
MSVC.
Cheers,
Pedro Alves
Index: gcc/gcc/config/arm/wince-pe.h
===================================================================
--- gcc/gcc/config/arm/wince-pe.h (revision 838)
+++ gcc/gcc/config/arm/wince-pe.h (working copy)
@@ -229,6 +229,13 @@
#undef DEFAULT_STRUCTURE_SIZE_BOUNDARY
#define DEFAULT_STRUCTURE_SIZE_BOUNDARY 8
+/* Force alignment of doubles to 64-bit. */
+#undef ARM_DOUBLEWORD_ALIGN
+#define ARM_DOUBLEWORD_ALIGN 1
+
+#undef BIGGEST_ALIGNMENT
+#define BIGGEST_ALIGNMENT 64
+
#undef TREE
#ifndef BUFSIZ
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