[PATCH 0/6] Add support for non-default autotools in rebuild rules.

[Stefano Lattarini]

Hello automakers.

Here is the (hopefully) final patch series providing a more correct and
consistent overriding of autoconf and autom4te at configure-time (for use
in automake-generated rebuild rules).

This is what the individual patches do, in detail:
 
 1. Add a tests (`remake0.test') that fails if the autoconf used by
    aclocal and the autoconf used by the testsuite don't match; this
    test is expected to fail with my current setup (bootstrap-time and
    configure-time overridden $AUTOCONF and $AUTOMA4TE, but no AUTOCONF
    nor AUTOM4TE in the environment).

 2. Fix tests `missing.test' and `missing2.test', to avoid spurious
    failures due to configure-time value of $AUTOCONF being an absolute
    path.
    
 3. Add the tests intoduced by the previous version of the patch, checking
    the support for bootstrap-time/configure-time overriding of autoconf
    and autom4te.  Some of these tests still fail at this point (they will
    be temporarly declared xfailing).

 4. Apply the changes to `m4/init.m4' and `lib/am/configure.am' introduced
    the previous version of the patch.  The changes are quite tricky and
    somewhat hackish, but seem necessary to deal correctly with all the
    scenarios where a bootstrap-time/configure-time overriding of autoconf
    and autom4te is in effect.  At this point, the new tests introduced in
    step 3 should pass.  However, this change also expose a bug (well,
    technically a limitation) in already-existing tests `missing.test' and
    `missing2.test'; they are declared as xfailing, and will be fixed by
    the next patch.
 
 5. Fix the tests `missing.test' and `missing2.test'.  This requires moving
    some of the checks in `missing.test' into a new test `missing7.test'.
    Since I was at it, I deepened and extended these checks.

 6. Be more correct in the definition and exporting of $AUTOCONF and
    $AUTOMAKE in `tests/defs.in', to better honour configure-time overrides.
    This change fixes failures of test `remake0.test' (introduced in step 1)
    in setups where autoconf and autom4te are overriden at configure time
    (this has been tested with my present setup).

-*-*-*-

Stefano Lattarini (6):
  1. Test that autoconf(s) used by the testsuite and by aclocal match.
  2. Testsuite: fix missing*.test for non-default autotools.
  3. Add tests for non-default autotools in rebuild rules.
  4. Improve support for non-default autotools in rebuild rules.
  5. Fix tests missing.test and missing2.test.
  6. Testsuite: improve support for non-default autotools.

 ChangeLog                      |   64 ++++++++++++++
 Makefile.in                    |   40 ++++++++-
 configure                      |   16 ++++-
 configure.ac                   |    4 +-
 doc/Makefile.in                |   15 +++-
 lib/Automake/Makefile.in       |   15 +++-
 lib/Automake/tests/Makefile.in |   15 +++-
 lib/Makefile.in                |   15 +++-
 lib/am/Makefile.in             |   15 +++-
 lib/am/configure.am            |   49 ++++++++++--
 m4/Makefile.in                 |   15 +++-
 m4/init.m4                     |   16 +++-
 tests/Makefile.am              |   10 ++
 tests/Makefile.in              |   25 ++++++-
 tests/defs.in                  |   31 ++++++-
 tests/missing.test             |   46 ++++++----
 tests/missing2.test            |   40 +++++++---
 tests/missing7.test            |   73 ++++++++++++++++
 tests/remake0.test             |   38 +++++++++
 tests/remake8a.test            |   94 +++++++++++++++++++++
 tests/remake8b.test            |   98 ++++++++++++++++++++++
 tests/remake8c.test            |  111 +++++++++++++++++++++++++
 tests/remake8d.test            |  179 ++++++++++++++++++++++++++++++++++++++++
 tests/remake8e.test            |  175 +++++++++++++++++++++++++++++++++++++++
 tests/remake8f.test            |  119 ++++++++++++++++++++++++++
 tests/remake8g.test            |  139 +++++++++++++++++++++++++++++++
 tests/remake8h.test            |   59 +++++++++++++
 27 files changed, 1462 insertions(+), 54 deletions(-)
 create mode 100755 tests/missing7.test
 create mode 100755 tests/remake0.test
 create mode 100755 tests/remake8a.test
 create mode 100755 tests/remake8b.test
 create mode 100755 tests/remake8c.test
 create mode 100755 tests/remake8d.test
 create mode 100755 tests/remake8e.test
 create mode 100755 tests/remake8f.test
 create mode 100755 tests/remake8g.test
 create mode 100755 tests/remake8h.test