[FYI] {maint} tests: fix spurious failures due to autom4te caching

[Stefano Lattarini]

* tests/aclocal9.test: Call aclocal and autoconf with the `--force'
option.
* tests/acloca10.test: Sleep between re-runs of aclocal and autoconf.
* tests/acloca18.test: Explicitly remove also the configure script
and the aclocal.m4 before re-invoking aclocal and autoconf.
---
 tests/acloca10.test |    8 +++++++-
 tests/acloca18.test |   20 +++++++++++++-------
 tests/aclocal9.test |    6 +++---
 3 files changed, 23 insertions(+), 11 deletions(-)

diff --git a/tests/acloca10.test b/tests/acloca10.test
index d7a058f..581fe77 100755
--- a/tests/acloca10.test
+++ b/tests/acloca10.test
@@ -1,5 +1,5 @@
 #! /bin/sh
-# Copyright (C) 2003, 2005  Free Software Foundation, Inc.
+# Copyright (C) 2003, 2005, 2012 Free Software Foundation, Inc.
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -55,6 +55,8 @@ grep MACRO3 aclocal.m4
 test ! -f m4_1/macro.m4
 test ! -f m4_2/macro.m4
 
+$sleep
+
 $ACLOCAL -I m4_2 -I m4_1
 $AUTOCONF
 ./configure
@@ -65,6 +67,8 @@ grep MACRO3 aclocal.m4
 test ! -f m4_1/macro.m4
 test ! -f m4_2/macro.m4
 
+$sleep
+
 $ACLOCAL -I m4_1 -I m4_2 --install
 $AUTOCONF
 ./configure
@@ -76,6 +80,8 @@ test -f m4_1/macro.m4
 test ! -f m4_2/macro.m4
 cp aclocal.m4 copy.m4
 
+$sleep
+
 echo '#GREPME' >>dirlist-test/macro.m4
 $ACLOCAL -I m4_1 -I m4_2 --install
 $AUTOCONF
diff --git a/tests/acloca18.test b/tests/acloca18.test
index de99786..589f0f2 100755
--- a/tests/acloca18.test
+++ b/tests/acloca18.test
@@ -1,5 +1,6 @@
 #! /bin/sh
-# Copyright (C) 2005, 2006, 2008, 2010 Free Software Foundation, Inc.
+# Copyright (C) 2005, 2006, 2008, 2010, 2012 Free Software Foundation,
+# Inc.
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -53,39 +54,44 @@ cat >4/mumble.m4 <<EOF
 AC_DEFUN([AM_MACRO1], [echo macro14 >> foo])
 EOF
 
+clean_stale ()
+{
+  rm -rf aclocal.m4 configure foo autom4te*.cache
+}
+
 $ACLOCAL -I 1 -I 2 -I 3 -I 4
 $AUTOCONF
 ./configure
 grep macro11 foo
 grep macro21 foo
 
-rm -rf foo autom4te*.cache
+clean_stale
 $ACLOCAL  -I 1 -I 2 -I 3 -I 4 --install
 $AUTOCONF
 ./configure
 grep macro12 foo
 grep macro23 foo
 
-rm -rf foo autom4te*.cache
+clean_stale
 $ACLOCAL -I 4 -I 1 -I 2 -I 3 --install --dry-run
 $AUTOCONF
 ./configure
 grep macro12 foo
 grep macro23 foo
 
-rm -rf foo autom4te*.cache
+clean_stale
 $ACLOCAL -I 4 -I 1 -I 2 -I 3 --install
 $AUTOCONF
 ./configure
 grep macro14 foo
 grep macro23 foo
 
-rm -rf foo autom4te*.cache
+clean_stale
 $ACLOCAL -I 4 -I 1 -I 2 --install 2>stderr && { cat stderr >&2; Exit 1; }
 cat stderr >&2
 grep 'macro.*AM_MACRO2.*not found' stderr
 
-rm -rf foo autom4te*.cache
+clean_stale
 $ACLOCAL -I 4 -I 1 --install
 $AUTOCONF
 ./configure
@@ -98,7 +104,7 @@ cat >dirlist-test/m1.m4 <<EOF
 AC_DEFUN([AM_MACRO1], [echo macro1d >> foo])
 AC_DEFUN([AM_MACRO2], [echo macro2d >> foo])
 EOF
-rm -rf foo autom4te*.cache
+clean_stale
 $ACLOCAL -I 4 -I 1 --diff=diff >stdout 2>stderr || {
   cat stderr >&2
   cat stdout
diff --git a/tests/aclocal9.test b/tests/aclocal9.test
index 325f6ae..7a786aa 100755
--- a/tests/aclocal9.test
+++ b/tests/aclocal9.test
@@ -1,5 +1,5 @@
 #! /bin/sh
-# Copyright (C) 2003  Free Software Foundation, Inc.
+# Copyright (C) 2003, 2012 Free Software Foundation, Inc.
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -42,8 +42,8 @@ $AUTOCONF
 grep macro11 foo
 grep macro21 foo
 
-$ACLOCAL -I m4_2 -I m4_1
-$AUTOCONF
+$ACLOCAL --force -I m4_2 -I m4_1
+$AUTOCONF --force
 ./configure
 grep macro12 foo
 grep macro21 foo
-- 
1.7.7.3