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_paulusUnfortunately 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