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[Bug bootstrap/11169] bootstrap failure after passing configure options


PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11169



------- Additional Comments From drow@mvista.com  2003-06-12 14:21 -------
Subject: Re:  bootstrap failure after passing configure options

On Thu, Jun 12, 2003 at 02:15:31PM -0000, jeroen.dobbelaere@acunia.com wrote:
> PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
> 
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11169
> 
> 
> 
> ------- Additional Comments From jeroen.dobbelaere@acunia.com  2003-06-12 14:15 -------
> > Is this any different from building a compiler and specifying
> > -mcpu=xscale on the command line?  I believe it isn't, and this sort of
> > inconsistency is _precisely_ what the patch was intended to accomplish. 
> > If it is different, then I goofed.
> 
> Nope, the problem is that a similar construct is not done when specifying the
> floating point unit (--with-fpu=...), although this will also need some changes
> to the 'specs' file.

Sorry, not sure what your answer to my question was...

> > Well, the Intel ABI specifies that Xscale should default to VFP,
> > doesn't it?  That's the problem.  If you want to build a compiler that
> > defaults to FPA instead, add support for a GCC option to specify FPA
> > (is there one already?) and add support for it to --with-float.  My two
> > cents.
> 
> I should check that one. If I remember correctly, on ARM it is not just a simple
> choice of -mfloat=hard/-mfloat=soft.
> 
> On our platform, we try to be binary compatible with familiar (armv4), but all
> binaries are optimized for xscale. The reason I 'complain' here, is that the
> 'old behavior' suddenly changed, breaking my automated tester :(

If you want to be binary compatible to familiar, then yes, you need to use
FPA.  But you should have to specify an option to get that - the Xscale
C ABI from Intel claims VFP.  I'm not sure where to get a copy, sorry.


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