Thread (17 messages) 17 messages, 6 authors, 2007-06-30

Re: Please pull from 'for_paulus' branch

From: Segher Boessenkool <hidden>
Date: 2007-06-29 09:15:45

quoted
Please pull from 'for_paulus' branch of

	master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc.git 
for_paulus
Unfortunately with those commits I get this when compiling for a
64-bit target:

{standard input}: Assembler messages:
{standard input}:668: Error: Unrecognized opcode: `sldi'
[etc.]
It turns out that with Arnd's patches we now get "-mcpu=powerpc64" on
the command line, and that means that gcc *doesn't* put "-mppc64" the
as command line, and as barfs on the 64-bit instructions.  That's
presumably a gcc bug, but we'll have to work around it.
It is not.  -mcpu=powerpc64 doesn't select an ABI, and your
GCC presumably defaults to the 32-bit ABI.  Use -m64 on the
GCC command line, too, you need it, and it solves this issue
as a side effect.

It would be a bug if GCC would allow 64-bit insns in the
32-bit ABI for Linux, but that is currently not the case :-(
I think the
best thing is just to not put the -mcpu=powerpc64 in CFLAGS when no
specific CPU is selected.
That would be the "use the compiler default CPU" option.


Segher
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