Re: [Linuxsampler-devel] problem to build linuxsampler 2.4.0 for armv7hl

[Christian S. <sch...@li...>]

On Thursday, June 19, 2025 8:35:53 AM CEST Philippe DIDIER wrote:
> Le 18/06/2025 à 12:25, Christian Schoenebeck a écrit :
[...]
> > I think that also needs some correction. Can you test the following patch?
> > 
> > Index: src/common/RTMath.cpp
> > ===================================================================
> > --- src/common/RTMath.cpp       (revision 4334)
> > +++ src/common/RTMath.cpp       (working copy)
> > @@ -74,16 +74,12 @@
> > 
> >       uint64_t t;
> >       asm volatile ("mrs %0, cntvct_el0" : "=r"(t));
> >       return (time_stamp_t) t;
> > 
> > -    #elif defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7S__)
> > -    uint32_t t;
> > -    asm volatile ("mrs %0, cntvct_el0" : "=r"(t));
> > -    return t;
> > 
> >       #elif defined(__APPLE__)
> >       return (time_stamp_t) mach_absolute_time();
> >       #elif defined(__arm__) /* ARMv6 and older */
> >       # warning ARM 'mrc' instruction requires special runtime privileges!
> >       uint32_t t;
> > 
> > -    asm volatile ("mrc p15, 0, %0, c15, c12, 1" : "=r" (t));
> > +    asm volatile ("mrc p15, 0, %0, c9, c13, 0" : "=r" (t));
> > 
> >       return t;
> >       #else // we don't want to use a slow generic solution
> >       #  error "Sorry, LinuxSampler lacks time stamp code for your
> >       system."
> > 
[...]
> I'm gonna test to compile with
> 
> asm volatile ("mrc p15, 0, %0, c9, c13, 0" : "=r" (t));
> 
> 
> Unfortunately we can't test the use on a real armv7hl system (using a
> virtual system is not enough)

It's been a while. Did you have a chance to test whether my suggested patch 
compiles for you?

/Christian