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Re: GNUstep base almost builds with clang
From: |
Richard Frith-Macdonald |
Subject: |
Re: GNUstep base almost builds with clang |
Date: |
Tue, 31 Mar 2009 17:13:33 +0100 |
On 30 Mar 2009, at 16:37, David Chisnall wrote:
The remaining issue is that clang (and llvm-gcc, for that matter)
does not support the __builtin_apply() family of intrinsics. These
are quite unreliable on GCC, and it seems that they are not used
when FFCall or FFI is supported, but are still compiled in.
mframe.m (which is really horrible) seems to be compiled
unconditionally, even though it does not seem to be used when ffcall
or libffi is provided.
NSInvocation.m provides default implementations in terms of
__builtin_apply() and friends that are not used when libffi or
ffcall is provided. Is it possible to move these into a separate
concrete subclass of NSInvocation along the lines of GSFFIInvocation/
GSFFCallInvocation and only compile them when no better mechanism is
provided?
I should think that's not only possible, but a very good idea.
I *think* (iirc) a little of the code in mframe is used for some
NSMethodSgnature features. It may be that we always need that part
compiled in, but it should be possible to separate out what we need,
and only build the rest of the code if we don't have libffi or ffcall.
objc-gnu2next.m uses them in a function that is deprecated on the
legacy Apple runtime and not supported by the modern Apple runtime.
Does anyone actually use next_objc_msg_sendv()?
I don't but it's always dangerous to assume that nobody else will. On
the other hand, that's old enough that we might insist on people
changing. The next major release will need to break ABI compatibility
for 64bit code in order to be compatible with Apple's recent changes,
so now is probably a good time to introduce other cleanups that break
the ABI in little-used or unused ways.
- GNUstep base almost builds with clang, David Chisnall, 2009/03/30
- Re: GNUstep base almost builds with clang,
Richard Frith-Macdonald <=
- Re: GNUstep base almost builds with clang, David Chisnall, 2009/03/31
- Re: GNUstep base almost builds with clang, David Ayers, 2009/03/31
- Re: GNUstep base almost builds with clang, David Chisnall, 2009/03/31
- Re: GNUstep base almost builds with clang, David Ayers, 2009/03/31
- Re: GNUstep base almost builds with clang, David Chisnall, 2009/03/31
- Re: GNUstep base almost builds with clang, Pete French, 2009/03/31
- Re: GNUstep base almost builds with clang, Andrew Pinski, 2009/03/31
- Re: GNUstep base almost builds with clang, Pete French, 2009/03/31
- Re: GNUstep base almost builds with clang, Andrew Pinski, 2009/03/31
- Re: GNUstep base almost builds with clang, Pete French, 2009/03/31