nano printf + powerpc gcc

[Alexander Fedotov]

Hi

I'm experienced a strange printf() for float variables behaviour with
Nano version while regular is fine. It just prins out a garbage (even
with enabled -u _printf_float). After some digging I've managed to
track down issue until this line:

n = _printf_float (data, &prt_data, fp, pfunc, &ap);


Moreover there are number of warnings also in build log:

src_newlib/newlib/libc/stdio/nano-vfprintf.c -o lib_a-nano-svfprintf.o
../../../../../../src_newlib/newlib/libc/stdio/nano-vfprintf.c: In
function '_svfprintf_r':
../../../../../../src_newlib/newlib/libc/stdio/nano-vfprintf.c:645:55:
warning: passing argument 5 of '_printf_float' from incompatible
pointer type
        n = _printf_float (data, &prt_data, fp, pfunc, &ap);
                                                                       ^
In file included from
../../../../../../src_newlib/newlib/libc/stdio/nano-vfprintf.c:169:0:
../../../../../../src_newlib/newlib/libc/stdio/nano-vfprintf_local.h:228:1:
note: expected 'struct __va_list_tag (*)[1]' but argument is of type
'struct __va_list_tag **'
 _printf_float (struct _reent *data,
 ^
../../../../../../src_newlib/newlib/libc/stdio/nano-vfprintf.c:650:45:
warning: passing argument 5 of '_printf_i' from incompatible pointer
type
  n = _printf_i (data, &prt_data, fp, pfunc, &ap);
                                                            ^
In file included from
../../../../../../src_newlib/newlib/libc/stdio/nano-vfprintf.c:169:0:
../../../../../../src_newlib/newlib/libc/stdio/nano-vfprintf_local.h:221:1:
note: expected 'struct __va_list_tag (*)[1]' but argument is of type
'struct __va_list_tag **'
 _printf_i (struct _reent *data, struct _prt_data_t *pdata, FILE *fp,


It looks like nano written without taking in mind such targets. Here I
found workaround https://gcc.gnu.org/bugzilla/show_bug.cgi?id=14557
that's working.

I'm attaching a patch.

Alex
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