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Re: [patch] fix pr 29302

From: Mike Stump <mrs at apple dot com>
To: roger at eyesopen dot com
Cc: Eric Christopher <echristo at apple dot com>, gcc-patches at gcc dot gnu dot org
Date: Mon, 18 Dec 2006 12:30:53 -0800
Subject: Re: [patch] fix pr 29302
References: <Pine.LNX.4.44.0612151544490.8913-100000@www.eyesopen.com> <32F1656C-CD35-4462-8F1B-44F6813B18F0@apple.com> <58918.68.35.10.103.1166409208.squirrel@mail.eyesopen.com>

On Dec 17, 2006, at 6:33 PM, roger@eyesopen.com wrote:

I tried reproducing this failure on powerpc-apple-darwin7.9.0 but without success. Sorry if I'm being a bit slow but is the IBM extended long double MacOS version specific?

-mlong-double-64 and -mlong-double-128 will select the size of long double regardless. There is much magic in this area and libc used to not have long double support. From rs6000/darwin.h:

/* Darwin has 128-bit long double support in libc in 10.4 and later.
   Default to 128-bit long doubles even on earlier platforms for ABI
   consistency; arithmetic will work even if libc and libm support is
   not available.  */

#define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128

I'd love to have been able to rewrite history so that it had always been 128, but my time machine broke down over the weekend...

References:
- Re: [patch] fix pr 29302
  - From: Roger Sayle
- Re: [patch] fix pr 29302
  - From: Eric Christopher
- Re: [patch] fix pr 29302
  - From: roger

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