@CPP_FOR_BUILD@ problem since binutils-2.38

[Alan Modra]

On Tue, Oct 11, 2022 at 12:21:44PM -0600, Tom Tromey wrote:
> >>>>> "Alan" == Alan Modra via Binutils <binutils@sourceware.org> writes:
> 
> Alan> To merge with gcc's copy of configure.ac we need to revert changes to
> Alan> configure.ac in the following gcc commits:
> Alan> dc832fb39fc0 2022-08-25
> Alan> fc259b522c0f 2022-06-25
> Alan> Then reapply configure.ac changes in binutils from these binutils
> Alan> commits:
> Alan> 50ad1254d503 2021-01-09
> Alan> bb368aad297f 2022-03-11
> Alan> e5f2f7d901ee 2022-07-26
> Alan> 2cac01e3ffff 2022-09-26
> Alan> Plus copy over gcc's config/ax_cxx_compile_stdcxx.m4, then regenerate
> Alan> configure.  configure.ac diff from current binutila shown below.
> 
> After this commit I get this when running configure:
> 
> ../binutils-gdb/configure: line 5699: ACX_PROG_GDC: command not found
> 
> I didn't look but I suppose some .m4 file has to be copied over from gcc
> as well.

Yes, config/acx.m4 needs refreshing.  Fixed.

-- 
Alan Modra
Australia Development Lab, IBM