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Re: [Emacs.app dev]: Problems compiling Emacs.app with GNUstep


From: Richard Frith-Macdonald
Subject: Re: [Emacs.app dev]: Problems compiling Emacs.app with GNUstep
Date: Wed, 16 Jul 2008 14:00:40 +0100


On 16 Jul 2008, at 12:54, Charles philip Chan wrote:

#8 0xb7752980 in -[NSObject doesNotRecognizeSelector:] (self=0xb7ae20e0, _cmd=0xb7b0bae8,
   aSelector=0x8409570) at NSObject.m:1705
#9 0xb7752b5c in -[NSObject forwardInvocation:] (self=0xb7ae20e0, _cmd=0x8465b58,
   anInvocation=0x853b4c8) at NSObject.m:1733
#10 0xb7808866 in GSFFIInvocationCallback (cif=0x8544900, retp=0xbf8bdf20, args=0xbf8bded0,
   user=0x8544900) at GSFFIInvocation.m:547
#11 0xb6e1a5da in ffi_closure_SYSV_inner (closure=0xb755c000, respp=0xbf8bdf2c, args=0xbf8bdf40)
   at src/x86/ffi.c:267
#12 0xb6e1a92a in ffi_closure_SYSV () from /usr/local/lib/libffi.so.5
#13 0x0827a831 in ns_alloc_autorelease_pool () at nsterm.m:519
#14 0x08169dd7 in main (argc=15, argv=0xbf8be384) at emacs.c:1419

So now you know where the problem occurs ... line 519 of nsterm.m ... maybe that's some help.

Interesting. Is libffi the preferred library now?

I suppose so ... the rationale for preferring ffcall was that it worked on more platforms, but with the latest releases of GNUstep-base I believe this is no longer the case. Using libffi is much better for debug (when you want to look at a stack trace) and is essential for using native exceptions (with ffcall the native exception code is unable to unwind the stack and likely to crash).

If so, this page
should be changed:

http://wwwmain.gnustep.org/resources/downloads.php?site=ftp%3A%2F%2Fftp.gnustep.org%2Fpub%2Fgnustep%2F#pre

Thanks ... I've updated that in CVS, so it should get propagated to the website in an hour or so.





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