There are some problems with it:
- On at least 4.6 and later, it crashes the compiler together with
-m64;
- On older versions, it generates incorrect code together with -m64;
- Supposedly it doesn't actually work on 32-bit either, on the
glibc side;
- It isn't listed in --target-help, because the option file says
"undocumented", but the manual does in fact list it;
- The Darwin header claims it is for POWER.
In the spirit of the rest of this patch series, I solve these
problems
by ripping it all out.
As we discussed on IRC, this should work but is broken. It should not
be ripped out.
I figured as much :-)
Would you please open a Bugzilla PR and include me, Meissner and Peter
Bergner on the CC list?
Done, PR54284.
Also committed the attached as obvious, to fix the issue that made me
do this patch in the first place.
Cheers,
Segher
2012-08-16 Segher Boessenkool <seg...@kernel.crashing.org>
* config/rs6000/darwin.h (TARGET_IEEE_QUAD): Fix comment.
--- gcc/config/rs6000/darwin.h (revision 190445)
+++ gcc/config/rs6000/darwin.h (working copy)
@@ -282,7 +282,7 @@
#undef TARGET_DEFAULT
#define TARGET_DEFAULT (MASK_MULTIPLE | MASK_PPC_GFXOPT)
-/* Darwin only runs on PowerPC, so short-circuit POWER patterns. */
+/* Darwin always uses IBM long double, never IEEE long double. */
#undef TARGET_IEEEQUAD
#define TARGET_IEEEQUAD 0
