* Makefile.am (AUTOMAKE_OPTIONS): Add "gnu".
* configure.ac: Update to work with automake 1.8, quote all
AC_DEFUN's correctly and provide descriptions for AC_DEFINE's.
* acinclude.m4: Likewise.
* acconfig.h: Removed.
* stage1/Makefile.am (.exec): Use suffix rules instead of pattern
rules.
* stage2/Makefile.am (.exec): Likewise.