[cfe-commits] r63242 - in /cfe/trunk: Driver/RewriteObjC.cpp include/clang/AST/Decl.h include/clang/AST/Expr.h include/clang/AST/ExprCXX.h include/clang/Basic/DiagnosticSemaKinds.def lib/AST/Expr.cpp lib/AST/StmtPrinter.cpp lib/CodeGen/CGExprAgg.

[Eli Friedman]

On Wed, Jan 28, 2009 at 3:46 PM, Douglas Gregor <dgregor at apple.com> wrote:
>
> On Jan 28, 2009, at 3:42 PM, Eli Friedman wrote:
>
>> On Wed, Jan 28, 2009 at 3:37 PM, Douglas Gregor <dgregor at apple.com> wrote:
>>>>
>>>> struct X { int a, b; };
>>>> struct X xs[] = { [0] = (struct X) { 1, 2 }, [0].b = 3 };
>>>>
>>>> In gnu89 mode in gcc, the init list is actually equivalent to "{1,
>>>> 3}".  clang, on the other hand, will give different results (although
>>>> it will also warn, so it might not be so bad).
>>>
>>> since both Clang and GCC
>>> get the answer { 0, 3} in their default invocation modes
>>
>> gcc gets {1, 3}.  But yeah, it's probably not a big deal.
>
> Which version of GCC are you using? With Apple GCC 4.0 and 4.2, compiling
> that code with no extra options results in {0, 3}.

eli at eli-laptop:~$ gcc -x c - -o - -S
struct X { int a, b; };
struct X xs[] = { [0] = (struct X) { 1, 2 }, [0].b = 3 };
	.file	""
.globl xs
	.data
	.align 4
	.type	xs, @object
	.size	xs, 8
xs:
	.long	1
	.long	3
	.ident	"GCC: (Ubuntu 4.3.2-1ubuntu11) 4.3.2"
	.section	.note.GNU-stack,"", at progbits