Hi Wolfgang,
On Thu, 22 Dec 2011 15:29:41 +0100
Wolfgang Denk <[email protected]> wrote:
> It appears that with recent versions of GCC the explicit
> "-mhard-float" command line option takes precedence over the
> ``asm(".gnu_attribute 4, 2");'' in the source file, so this no longer
> helps to avoid the warnings we get when linking code that uses FP
> instructions with other code that was built using soft-float.
>
> We can remove the ".gnu_attribute" (which appears to carry no other
> information, at least so far) from the object files, but we also have
> to make sure we don't pull in the __gcc_qsub() and __gcc_qmul()
> functions from the standard libgcc, as these would again "infect" our
> linking. We copy this code from:
> gcc-4.2.2/gcc/config/rs6000/darwin-ldouble.c
> This old version was chosen because it was still available under a
> compatible license (GCC v2+). The file was stripped down to the
> needed parts, and reformatted so it passes checkpatch with only one
> warning (do not add new typedefs).
>
> Signed-off-by: Wolfgang Denk <[email protected]>
> Cc: Kumar Gala <[email protected]>
> Cc: Stefan Roese <[email protected]>
> Cc: Andy Fleming <[email protected]>
> Cc: Kim Phillips <[email protected]>
Tested on TQM5200.
Tested-by: Anatolij Gustschin <[email protected]>
Anatolij
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