On Jun 15, 2006, at 12:35 PM, Dan Bogdanov wrote:
> -march=i686 (and all -march=ix86) create the "unknown instruction"
> errors. I don't know what should be used... If I skip the argument,
> everything works.
Hmm, Frank added this fragment to configure.ac in April:
AS_IF([test $host_vendor = apple],
[# Work around issue on intel macs, where "-fpmath=sse"
is on by
# default, but this breaks compilation when combined with
# the "-march=i586" selected below. So the "minimum"
optimization
# on x86 Apples is -march=i686.
CS_CHECK_CODE_GEN_FLAG([[*[3-9]86]], [-march=i686])])
The comment seem to say that, at the time, -march=i686 was
acceptable, but -march=i586 was not. Based upon your experience,
this no longer seems to be the case.
I'm not quite sure what a good solution would be. We could disable
the automated -march=foo check entirely for Apple, I suppose.
-- ES
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