Re: Build error with GCC13 + newlib 4.1.0 - error: 'float_t' undeclared

On Sat, May 27, 2023, 7:02 PM Chris Packham <[email protected]> wrote:

> Hello from CT-NG,
>
> I user reported the following build error with newlib after GCC13.1
> was added recently
>

By any chance did the default version of C change in 13 versus what
worked.before?

FWIW It looks.like the bleeding edge RTEMS tool builds in our farm have
some issue with gdb. So I don't have a handy case to compare.


> src/newlib/newlib/libm/math/wf_log2.c:34:22: error: 'float_t'
> undeclared (first use in this function); did you mean 'float'?
>        34 |   return (logf(x) / (float_t) M_LN2);
>           |                      ^~~~~~~
>           |                      float
>
> From what I've been able to follow so far this may have something to
> do with how FLT_EVAL_METHOD is defined. It's not really mentioned in
> the GCC docs as something that has changed but I wonder if it is
> perhaps implied by a C standard the default of which probably has
> changed.
>
> Does this ring any bells for anyone?
>