Re: 13-m4-undivert-culprit.patch

[Akim Demaille]

>>>>> "Gary" == Gary V Vaughan <address@hidden> writes:

[Robust echo]

>> Yes, I do.  It is not unusual and actual Autoconf is in bad need
>> for such a feature.  For instance we know that our smally heredocs
>> for AC_DEFINE and so on are extremely costly.  But we can't take
>> any risks, hence heredocs.  With a good echo, we're done, and then
>> it speeeeeeeeeeeeeds again.

Gary> Cool.  There is a lot of funny interaction between libtool.m4
Gary> and ltmain.sh that makes this work IIRC -- I'll be happy to help
Gary> out with any awkwardness you encounter when you move that code
Gary> over.

Thanks for the tip.  I know I have to do that, but I don't know when :(
Maybe I could ask Lars or Pavel.

>> There were impressive figures about GCC's configure slowness on
>> some arch precisely because of these heredocs.

Gary> Is GCC using autoconf now?  Wow, shows how much attention I've
Gary> been paying.  I thought the whole tree ran from Cygnus
Gary> configure.

Sorry, I was wrong indeed, it's just libstdc++.  See the thread
starting at http://gcc.gnu.org/ml/gcc/2001-05/msg00905.html.  Hm, no
that's not that one.  Well, you'll have to dig around :(