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Subject: [Bug bootstrap/52878] [4.8 regression] bootstrap failure: "MASK_LONG_DOUBLE_128" redefined
Date: Wed, 18 Apr 2012 21:06:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52878

--- Comment #9 from H.J. Lu <hjl.tools at gmail dot com> 2012-04-18 21:04:37 UTC ---
(In reply to comment #8)
> > If someone can provide a description of what TARGET_LONG_DOUBLE_128
> > should be in all cases, I can try to come up with a patch.
> 
> It should be:
> 
> options.h:#define MASK_LONG_DOUBLE_128 (1 << 16)
> options.h:#define TARGET_LONG_DOUBLE_128 ((target_flags & MASK_LONG_DOUBLE_128)
> != 0)
> 
> on SPARC/Solaris, but of course the (1 << 16) is dependent on other options, so
> a patch that hardcodes it isn't acceptable, IOW this must be fixed in
> opth-gen.awk.

For a target which doesn't use long-double-switch.opt, will
TARGET_LONG_DOUBLE_128 be a fixed value? If no, how is its
value determined? If yes, what is the fixed value?