[RFC patch] non-release srctrees: --enable-targets=all & 64bit & -lmcheck

[Alan Modra]

On Fri, May 18, 2012 at 11:14:10PM +0200, Jan Kratochvil wrote:
> --enable-targets=all commonly discovers checked in regressions:
> 	http://sourceware.org/ml/binutils/2012-05/msg00271.html

Not in this particular case.  I built binutils for native x86_64-linux
--enable-targes=all.  In fact, I also built 115 different cross
targets (needed to test gas reasonably well).  I've now added one more
target. :)

> 	http://sourceware.org/ml/gdb-patches/2012-05/msg00548.html
> 	http://sourceware.org/ml/gdb-patches/2012-05/msg00003.html
> 	http://sourceware.org/ml/gdb-patches/2012-03/msg00279.html
> 	http://sourceware.org/ml/gdb-patches/2011-03/msg00600.html
> 	(many more, I did not search too thoroughly)

There are cases where building with --enable-targets=all hides bugs,
for example
http://sourceware.org/ml/binutils/2012-05/msg00219.html

> --enable-64-bit-bfd is required for full --enable-targets=all.

Always building with a 64-bit bfd hides another class of bug.

I'm not in favour of this patch.  Yes, it may help first-time
contributors in testing their patches, but means yet another change in
configure options for anyone past that stage.  (Hey, I tested my patch
on 32-bit i686-linux and 64-bit x86_64-linux and you say it's not
64-bit clean??)

-- 
Alan Modra
Australia Development Lab, IBM