RFC: Changing AC_PROG_CC to AC_PROG_CC_C99 in top level configure

[Joseph Myers]

On Tue, 27 Apr 2021, Nick Clifton via Binutils wrote:

> > and instead AC_PROG_CC enables C11 mode if supported.  (So moving to the
> > latest Autoconf and Automake releases would supersede this change.)
> 
> Makes sense.  Is changing to autoconf 2.70 something that is planned for the
> near future ?

It would be 2.71, and I don't know.  (Simon Marchi did the previous update 
for binutils-gdb, I then used that as a basis for updating GCC.)

-- 
Joseph S. Myers
joseph@codesourcery.com