1 files changed, 103 insertions, 0 deletions
diff --git a/t/parallel-am.sh b/t/parallel-am.sh
new file mode 100755
index 000000000..db184b283
--- /dev/null
+++ b/t/parallel-am.sh
@@ -0,0 +1,103 @@
+#! /bin/sh
+# Copyright (C) 2008-2012 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
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Test parallel automake execution.
+
+# There are several hypotheses to be tested:  Independently of the number
+# of threads used by automake,
+# 0) the generated Makefile.in files must be identical without --add-missing,
+# 1) the Makefile.in that distributes auxiliary files must be generated
+#    after all other ones, so all installed aux files are caught,
+# 2) normal automake output should have identical content and be ordered
+#    in the same way, when --add-missing is not passed, or when
+#    --add-missing is passed but there are no concurrent file requirements
+#    (i.e., two Makefile.am files call for the same needed aux file)
+# 3) normal automake output should be identical and ordered in the same way
+#    with --add-missing, even with concurrent file requirements, and the
+#    installation of aux files should be race-free,
+# 4) warning and normal error output should be identical, in that duplicate
+#    warnings should be omitted in the same way as without threads,
+# 5) fatal error and debug messages could be identical.  This is not
+#    intended, though.
+#
+# This test checks (0), (1), and (2).  See sister tests for further coverage.
+
+required=perl-threads
+. ./defs || Exit 1
+
+cat > configure.ac << 'END'
+AC_INIT([parallel-am], [1.0])
+AC_CONFIG_AUX_DIR([build-aux])
+AM_INIT_AUTOMAKE
+AC_PROG_CC
+AM_PATH_LISPDIR
+AM_PATH_PYTHON
+AC_CONFIG_FILES([Makefile])
+END
+
+cat > Makefile.am << 'END'
+SUBDIRS =
+END
+
+list='1 2 3 4 5 6 7 8 9'
+for i in $list; do
+  echo "AC_CONFIG_FILES([sub$i/Makefile])" >> configure.ac
+  echo "SUBDIRS += sub$i" >> Makefile.am
+  mkdir sub$i
+  echo > sub$i/Makefile.am
+done
+# Use an include chain to cause a nontrivial location object to be
+# serialized through a thread queue.
+echo 'include foo.am' >> sub7/Makefile.am
+echo 'include bar.am' > sub7/foo.am
+echo 'python_PYTHON = foo.py' > sub7/bar.am
+echo 'lisp_LISP = foo.el' >> sub8/Makefile.am
+echo 'bin_PROGRAMS = p' >> sub9/Makefile.am
+
+rm -f install-sh missing depcomp
+mkdir build-aux
+
+$ACLOCAL
+
+# This test may have to be run several times in order to expose the
+# race that, when the last Makefile.in (the toplevel one) is created
+# before the other ones have finished, not all auxiliary files may
+# be installed yet, thus some may not be distributed.
+#
+# Further, automake output should be stable.
+
+# Generate expected output using the non-threaded code.
+unset AUTOMAKE_JOBS || :
+AUTOMAKE_run --add-missing
+mv stderr expected
+Makefile_ins=`find . -name Makefile.in`
+for file in $Makefile_ins; do
+  mv $file $file.exp
+done
+
+AUTOMAKE_JOBS=5
+export AUTOMAKE_JOBS
+
+for run in 1 2 3 4 5 6 7; do
+  rm -f build-aux/* sub*/Makefile.in
+  AUTOMAKE_run --add-missing
+  diff stderr expected
+  for file in $Makefile_ins; do
+    diff $file $file.exp
+  done
+done
+
+: