[petsc-dev] GCC8 Fortran length changes from int to size_t

[Satish Balay]

So we need a 64bit arm with gcc8 - for this testcase failure?

Satish

On Wed, 2 May 2018, Jed Brown wrote:

> On x86-64 Linux, the first six integer arguments are passed in registers
> (rdi, rsi, rdx, rcx, r8, r9).  Multiple smaller integers are not packed
> into these registers, but they are accessed as 32-bit (edi, ...).
> 
> Satish Balay <balay at mcs.anl.gov> writes:
> 
> > Well it should atleast bite for functions that have 2 char arguments. Perhaps
> > none of the tests are using these routines..
> >
> > Satish
> >
> > On Wed, 2 May 2018, Jed Brown wrote:
> >
> >> Is the length passed in registers and incorrectly using the lower half
> >> of the register provides the int part?
> >> 
> >> Satish Balay <balay at mcs.anl.gov> writes:
> >> 
> >> > hm - I have gfortran-8 on my laptop - but haven't seen any testsuite regressions due to this change.
> >> >
> >> > Satish
> >> >
> >> > On Wed, 2 May 2018, Jed Brown wrote:
> >> >
> >> >> See Fortran Language Issues.
> >> >> 
> >> >>   https://gcc.gnu.org/gcc-8/porting_to.html
> >> >> 
> >> >> We'll have to test for this (probably compiler version) and change the
> >> >> PETSC_MIXED_LEN / PETSC_END_LEN to use size_t instead of int.
> >> >> 
> >> 
>