On Mon, Apr 08, 2013 at 04:36:47PM +0200, Andreas Färber wrote:
> Am 08.04.2013 14:19, schrieb Gleb Natapov:
> > On Tue, Apr 02, 2013 at 04:29:32PM +0300, Gleb Natapov wrote:
> >>> static void kvm_sw_tlb_put(PowerPCCPU *cpu)
> >>> {
> >>> CPUPPCState *env = &cpu->env;
> >>> diff --git a/target-s390x/cpu.c b/target-s390x/cpu.c
> >>> index 23fe51f..6321384 100644
> >>> --- a/target-s390x/cpu.c
> >>> +++ b/target-s390x/cpu.c
> >>> @@ -84,6 +84,10 @@ static void s390_cpu_reset(CPUState *s)
> >>> * after incrementing the cpu counter */
> >>> #if !defined(CONFIG_USER_ONLY)
> >>> s->halted = 1;
> >>> +
> >>> + if (kvm_enabled()) {
> >>> + kvm_arch_reset_vcpu(s);
> >> Does this compile with kvm support disabled?
> >>
> > Well, it does not:
> > CC s390x-softmmu/target-s390x/cpu.o
> > /users/gleb/work/qemu/target-s390x/cpu.c: In function 's390_cpu_reset':
> > /users/gleb/work/qemu/target-s390x/cpu.c:89:9: error: implicit
> > declaration of function 'kvm_arch_reset_vcpu'
> > [-Werror=implicit-function-declaration]
> > /users/gleb/work/qemu/target-s390x/cpu.c:89:9: error: nested extern
> > declaration of 'kvm_arch_reset_vcpu' [-Werror=nested-externs]
> > cc1: all warnings being treated as errors
> >
> > I wonder if it is portable between compilers to rely on code in if(0){} to
> > be dropped in all levels of optimizations.
>
> No, we had a previous case where --enable-debug broke if (kvm_enabled())
> {...} but regular builds worked.
>
Can you recall what compiler was it with? 4.7.2 works with -O0.
--
Gleb.
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