[Bug jit/64810] jit not working on armv7hl ("ld: error: /tmp/libgccjit-ZGemdr/fake.so uses VFP register arguments, /tmp/ccJFCBsE.o does not")

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64810

--- Comment #7 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to ramana.radhakrishnan@arm.com from comment #4)
> On 27/01/15 12:27, jakub at gcc dot gnu.org wrote:
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64810
> >
> > Jakub Jelinek <jakub at gcc dot gnu.org> changed:
> >
> >             What    |Removed                     |Added
> > ----------------------------------------------------------------------------
> >                   CC|                            |jakub at gcc dot gnu.org
> >
> > --- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> > Both the compiler and libgccjit were configured with:
> > --with-tune=cortex-a8 --with-arch=armv7-a --with-float=hard
> > --with-fpu=vfpv3-d16 --with-abi=aapcs-linux
> 
> 
> The --with-abi=aapcs-linux in addition to the --with-float=hard argument 
> is just wrong. In fact it allows for a case where if the order of 
> command line arguments passed to the compiler if in some way is wrong, 
> the code generated will force the compiler into passing floating point 
> parameters through the integer registers rather than fp registers which 
> is what the --with-float=hard configure time option is doing.
> 
> Really Fedora should remove this from the configure line as it only 
> confuses people.

Ramana: I'm sorry, I had trouble parsing your comment (e.g. which option were
you referring to by "this" in the final sentence above).

What should I configure with when debugging this?
e.g. should I keep the --with-abi=aapcs-linux and lose the --with-float=hard? 
should I be testing with the other options Jakub mentioned?  etc.

(Sorry about my ignorance here; I'm not particularly familiar with arm, and my
test machine is slow which makes it difficult to exhaustively try every
possibility).