[Bug libffi/40242] unsupported asm instructions in libffi/src/arm/sysv.S

["mkl at pengutronix dot de" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #3 from mkl at pengutronix dot de  2009-05-29 08:22 -------
Hello Andrew,

(In reply to comment #2)
> http://www.nabble.com/Re:-libFFI-arm-compilation-fails-with-assembly-td20346235.html

BTW: I'm not compiling libffi stand alone, here. I'm building the gcc with java
enabled.

IMHO using "-mfloat-abi=soft" when preprocessing sysv.S can be considered a
workaround not a fix.

It makes only sense if the compiler passes (by default) floats in the integer
registers (-mfloat-abi=soft and -mfloat-abi=softfp), and breaks if passing in
the float registers (-mfloat-abi=hard).

With the work done in ARM/hardvfp_4_4_branch the -mfloat-abi=hard case is more
relevant then ever.

This means we cannot use "-mfloat-abi=soft" unconditionally, which boils down
(again) to the question: how can we distinguish between the
float-passed-in-int-regs and float-passed-in-float-regs case. Ideally this
should work if building libffi as part of gcc and if building libffi
standalone.

cheers, Marc


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40242