I'm not aware of __builtin_apply, but the target arch is arm. Not sure whether it's eabi or oabi. Whatever the default of gcc-4.0.1 is. -----Original Message----- From: Robert William Fuller [mailto:hydrologiccycle@xxxxxxxxx] Sent: Tuesday, December 02, 2008 5:27 PM To: David Daney Cc: Austin, Alex; Harvey Chapman; gcc-help@xxxxxxxxxxx Subject: Re: va_arglist David Daney wrote: > Austin, Alex wrote: >> That's all about unpacking an arglist. > > No, it does both 'packing' and 'unpacking'. > >> I need to pack an arglist. Also, the function in question isn't >> actually printf, but a custom API, and it doesn't have a vprintf >> equivalent. > > If your architecture is supported by libffi, and the vargs ABI is the > same as the ABI for fixed args, libffi should do exactly what you need. > > David Daney Whatever you do, don't try to use __builtin_apply. It's busted on x86-64. This is why the Objective-C runtime is broken out of the box on x86-64. The only reason Objective-C works for the GnuStep project is they are using hooks in the runtime to replace calls to __builtin_apply with calls to libffi in their runtime.
