gcc-4.2 build dies in autoconf

[Tim Prince <timothyprince@xxxxxxxxxxxxx>]

make[3]: Entering directory 
`/cygdrive/c/gnu/gcc-4.2-20060513/xp/build-i686-pc-c
ygwin/fixincludes'
autoconf
autoconf-2.5x: no input file

The snapshots have been doing this for about a month. I saw it also when 
I tried x86-64 linux.  I must have missed a change in build 
instructions; I didn't think autoconf was needed before.

Today's snapshot also demanded autogen, which I was able to install 
after rebuilding guile from source.