* autogen.sh: Generate.

* autogen.sh: Generate.

* stepmake/configure:
* configure: Regenerate.

* stepmake/stepmake/automatically-generated.sub.make: Keep
original first line.

* stepmake/stepmake/toplevel-targets.make (autogen.sh): Add rule.

* stepmake/stepmake/generic-targets.make (configure): Generate
using autogen.sh.

* GNUmakefile.in (SCRIPTS):
* stepmake/GNUmakefile.in (SCRIPTS): Add autogen.sh

* stepmake/autogen.sh: New file.

* configure: Check for g++ >= 2.95.

* stepmake/aclocal.m4: Fixes for FlexLexer.h, Python headers.  GNU
c/c++ version checking.