>>>>> "Tom" == Tom Lane <tgl@sss.pgh.pa.us> writes:
>> I kinda wonder if we should add -mno-x87 or such in configure when
>> we detect clang, obviously it doesn't deal correctly with this.
Tom> Seems worth looking into, but what happens if someone tries to
Tom> compile for x87 hardware? Or do we care anymore?
Already discussed this one on IRC with Andres, but to put this on record
for future reference: we can't use -mno-x87 on 32bit intel, even with an
-march= option with an SSE2 capable CPU, because the 32-bit ABI requires
floats to be returned in the x87 registers and breaking that either
results in silently wrong results or in clang dying with "fatal error:
error in backend: X87 register return with X87 disabled" or similar.
--
Andrew (irc:RhodiumToad)
