Generate overall summary of test results.

This patch, an updated version of
<https://sourceware.org/ml/libc-alpha/2014-01/msg00197.html>, makes
testsuite runs generate an overall summary of test results.

A new script merge-test-results.sh deals both with collecting results
within a directory to a file with all the results from that directory,
and collecting the results from subdirectories into a single overall
file (there's not much in common between the two modes of operation of
the script, but it seemed silly to have two separate scripts for
this).  Within a directory, missing results produce UNRESOLVED lines;
at top level, missing results for a whole directory produce an ERROR
line (since toplevel can't identify what the specific missing tests
are in this case).

Note that this does not change the rules for when "make" considers
there has been an error, or terminates, so unexpected failures will
still cause make to terminate, or, with -k, mean the commands for
"tests" don't get run because of failure of a dependency.

Tested x86_64, including that the summary does in fact reflect all the
tests with .test-result files.

	* scripts/merge-test-results.sh: New file.
	* Makefile (tests-special-notdir): New variable.
	(tests): Run merge-test-results.sh.
	(xtests): Likewise.
	* Rules (tests-special-notdir): New variable.
	(xtests-special-notdir): Likewise.
	(tests): Run merge-test-results.sh
	(xtests): Likewise.

ChangeLog

@@ -1,5 +1,14 @@
 2014-03-07  Joseph Myers  <joseph@codesourcery.com>
 
+	* scripts/merge-test-results.sh: New file.
+	* Makefile (tests-special-notdir): New variable.
+	(tests): Run merge-test-results.sh.
+	(xtests): Likewise.
+	* Rules (tests-special-notdir): New variable.
+	(xtests-special-notdir): Likewise.
+	(tests): Run merge-test-results.sh
+	(xtests): Likewise.
+
 	* Makeconfig (test-xfail-name): New variable.
 	(evaluate-test): Use $(test-xfail-name) instead of $(@F:.out=) to
 	compute variable name for expected failures.

Makefile

@@ -316,7 +316,18 @@ $(objpfx)begin-end-check.out: scripts/begin-end-check.pl
 	$(evaluate-test)
 endif
 
+tests-special-notdir = $(patsubst $(objpfx)%, %, $(tests-special))
 tests: $(tests-special)
+	$(..)scripts/merge-test-results.sh -s $(objpfx) "" \
+	  $(sort $(tests-special-notdir:.out=)) \
+	  > $(objpfx)subdir-tests.sum
+	$(..)scripts/merge-test-results.sh -t $(objpfx) subdir-tests.sum \
+	  $(sort $(subdirs) .) \
+	  > $(objpfx)tests.sum
+xtests:
+	$(..)scripts/merge-test-results.sh -t $(objpfx) subdir-xtests.sum \
+	  $(sort $(subdirs)) \
+	  > $(objpfx)xtests.sum
 
 # The realclean target is just like distclean for the parent, but we want
 # the subdirs to know the difference in case they care.

Rules

@@ -102,6 +102,17 @@ tests: $(tests:%=$(objpfx)%.out) $(tests-special)
 xtests: tests $(xtests:%=$(objpfx)%.out) $(xtests-special)
 endif
 
+tests-special-notdir = $(patsubst $(objpfx)%, %, $(tests-special))
+xtests-special-notdir = $(patsubst $(objpfx)%, %, $(xtests-special))
+tests:
+	$(..)scripts/merge-test-results.sh -s $(objpfx) $(subdir) \
+	  $(sort $(tests) $(tests-special-notdir:.out=)) \
+	  > $(objpfx)subdir-tests.sum
+xtests:
+	$(..)scripts/merge-test-results.sh -s $(objpfx) $(subdir) \
+	  $(sort $(xtests) $(xtests-special-notdir:.out=)) \
+	  > $(objpfx)subdir-xtests.sum
+
 ifeq ($(build-programs),yes)
 binaries-all-notests = $(others) $(sysdep-others)
 binaries-all-tests = $(tests) $(xtests) $(test-srcs)

scripts/merge-test-results.sh

@@ -0,0 +1,61 @@
+#! /bin/sh
+# Merge test results of individual tests or subdirectories.
+# Copyright (C) 2014 Free Software Foundation, Inc.
+# This file is part of the GNU C Library.
+
+# The GNU C Library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+
+# The GNU C Library 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
+# Lesser General Public License for more details.
+
+# You should have received a copy of the GNU Lesser General Public
+# License along with the GNU C Library; if not, see
+# <http://www.gnu.org/licenses/>.
+
+# usage: merge-test-results.sh -s objpfx subdir test-name...
+# (subdirectory tests; empty subdir at top level), or
+#        merge-test-results.sh -t objpfx subdir-file-name subdir...
+# (top-level merge)
+
+set -e
+
+type=$1
+objpfx=$2
+shift 2
+
+case $type in
+  -s)
+    subdir=$1
+    shift
+    subdir=${subdir:+$subdir/}
+    for t in "$@"; do
+      if [ -s "$objpfx$t.test-result" ]; then
+	head -n1 "$objpfx$t.test-result"
+      else
+	echo "UNRESOLVED: $subdir$t"
+      fi
+    done
+    ;;
+
+  -t)
+    subdir_file_name=$1
+    shift
+    for d in "$@"; do
+      if [ -f "$objpfx$d/$subdir_file_name" ]; then
+	cat "$objpfx$d/$subdir_file_name"
+      else
+	echo "ERROR: test results for $d directory missing"
+      fi
+    done
+    ;;
+
+  *)
+    echo "unknown type $type" >&2
+    exit 1
+    ;;
+esac