[PATCH] build: fix rebuild rules for Makefile.in and aclocal.m4

[Stefano Lattarini]

They have been broken after our removal of the 'perllibdir' hack
in yesterday's commit v1.12.4-45-g4872dfe.

* configure.ac: Rather then redefining AUTOMAKE and ACLOCAL to
explicitly override the perllibdir, the acdir and the libdir, use
the ready-made t/wrap/{aclocal,automake}-$APIVERSION scripts.
* NEWS: Document the fix.

Signed-off-by: Stefano Lattarini <address@hidden>
---
 NEWS         | 10 +++++++++-
 configure.ac | 10 ++++++----
 2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/NEWS b/NEWS
index 438ec68..5a5ec10 100644
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,4 @@
-New in 1.12.5:
+New in 1.12.6:
 
 * WARNING: Future backward-incompatibilities!
 
@@ -61,6 +61,14 @@ New in 1.12.5:
     giving more useful warnings than a bare "command not found" from a
     make recipe would.
 
+Bugs fixed in 1.12.6:
+
+* Bugs introduced in 1.12.5:
+
+  - The maintainer rebuild rules for Makefiles and aclocal.m4 in Automake's
+    own build system works correctly again.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 * Vala support:
 
   - The AM_PROG_VALAC macro has been enhanced to takes two further
diff --git a/configure.ac b/configure.ac
index 7f3dc33..7f126c4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -63,10 +63,12 @@ AC_SUBST([amdir], ["\${pkgvdatadir}/am"])
 AC_SUBST([automake_acdir], ["\${datadir}/aclocal-$APIVERSION"])
 AC_SUBST([system_acdir], ["\${datadir}/aclocal"])
 
-# $AUTOMAKE and $ACLOCAL are always run after a "cd $top_srcdir",
-# hence '.' is really what we want for perllibdir, libdir, and acdir.
-ACLOCAL="perllibdir=\"`pwd`/lib$PATH_SEPARATOR./lib\" \"`pwd`/aclocal\" 
--acdir=m4 -I m4"
-AUTOMAKE="perllibdir=\"`pwd`/lib$PATH_SEPARATOR./lib\" \"`pwd`/automake\" 
--libdir=lib"
+# Our build system is bootstrapped with the bleeding-edge versions of
+# aclocal and automake, hence the remake rules must use those versions
+# as well.  The extra quoting is to cater to cases when the build
+# directory contains whitespace or shell metacharacters.
+ACLOCAL="\"`pwd`/t/wrap/aclocal-$APIVERSION\""
+AUTOMAKE="\"`pwd`/t/wrap/automake-$APIVERSION\""
 
 AC_PATH_PROG([PERL], [perl])
 if test -z "$PERL"; then
-- 
1.8.0.150.gb0b00a3