Re: 2.6.19-rc5-mm1 fails to compile with gcc 4.2

From: Avi Kivity
Date: Sun Nov 12 2006 - 04:25:49 EST


Bernhard Rosenkraenzer wrote:
On Sunday, 12. November 2006 09:22, Avi Kivity wrote:
Bernhard Rosenkraenzer wrote:
drivers/kvm/kvm_main.c: In function 'kvm_dev_ioctl_run':
drivers/kvm/kvm_main.c:153: error: 'asm' operand has impossible
constraints drivers/kvm/kvm_main.c:158: error: 'asm' operand has
impossible constraints
Smells like a gcc regression. Can you send .config?

Or better yet, preprocessed source and full gcc command line (as seen on
'make V=1').

It does look like a gcc bug -- -O0 makes it go away.
Details at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29808

That's a different bug, gcc generates code that the assembler can't handle. Might be an assembler bug.

Can you compile it with -S and post the generated assembly?

--
error compiling committee.c: too many arguments to function

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