--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/contrib/check_makefile_deps.sh	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,94 @@
+#! /bin/sh
+#
+# Check for accurate dependencies in gcc/Makefile.in.
+#
+# Copyright (C) 2008 Free Software Foundation, Inc.
+# Written by Ralf Wildenhues <Ralf.Wildenhues@gmx.de>.
+#
+# This script is Free Software, and it can be copied, distributed and
+# modified as defined in the GNU General Public License.  A copy of
+# its license can be downloaded from http://www.gnu.org/copyleft/gpl.html
+#
+# Start this script in an up to date build-tree/gcc directory.
+# Using it in stage1 only works if the host compiler is GCC.
+
+# To continue an interrupted check, make sure there are no *.o.backup
+# files lying around (i.e., move them back to their original name),
+# and set $start_after to the name of the last object that should be skipped.
+start_after=
+
+# Skip some objects unconditionally; make sure each name in this list is
+# surrounded by spaces.
+skip=" crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o crtfastmath.o crtprec64.o crtprec80.o crtprec32.o "
+
+# Files which show up as dependencies other than through unconditional #include.
+# This is an egrep pattern.
+hidden_dep_files='(BASE-VER|DATESTAMP|DEV-PHASE|Makefile|xcoffout\.h|basic-block\.h|bconfig\.h)$'
+
+: ${MAKE=make}
+: ${EGREP="grep -E"}
+
+# -------------------------------------------------------------------------
+# There should be no need for changes beyond this point.
+
+set -e
+st=0
+
+if test -f c-common.o; then :; else
+  echo "$0: rerun in an up to date build-tree/gcc directory" >&2
+  exit 1
+fi
+
+for obj in *.o
+do
+  if test -n "$start_after"; then
+    if test $obj = $start_after; then
+      start_after=
+    fi
+    continue
+  fi
+  case $skip in *\ $obj\ *) continue ;; esac
+
+  mv -f $obj $obj.backup
+  ${MAKE} $obj CFLAGS='-MM -MF depfile'
+  mv -f $obj.backup $obj
+  ${MAKE} -t
+  LC_ALL=C ${MAKE} -d $obj >make-d-log
+  hdrs=`cat depfile`
+  for hdr in $hdrs; do
+    case $hdr in
+      *: | *.o | \\ | /* ) ;;
+      *)
+        echo $hdr ;;
+    esac
+  done < depfile |
+  LC_ALL=C sort -u > hdrs
+
+
+  sed -n '/.*Prerequisite..\([^ ]*\). is newer than target .'"$obj"'.*/s//\1/p' \
+    < make-d-log |
+  LC_ALL=C sort -u > not-up-to-date
+  if test -s not-up-to-date; then
+    st=1
+    echo "$0: error: prerequisites for $obj are not up to date:" >&2
+    cat not-up-to-date >&2
+  fi
+  sed -n '/.*Prerequisite..\([^ ]*\). is older than target .'"$obj"'.*/s//\1/p' \
+    < make-d-log |
+  LC_ALL=C sort -u > deps
+  missing_deps=`LC_ALL=C join -v 1 hdrs deps`
+  unneeded_deps=`LC_ALL=C join -v 2 hdrs deps | $EGREP -v "$hidden_dep_files" || :`
+  if test -n "$missing_deps"; then
+    st=1
+    echo "missing deps for $obj:"
+    echo "$missing_deps" | sed 's/^/  /'
+  fi
+  if test -n "$unneeded_deps"; then
+    # unneeded dependencies are not a big problem, so they cause no failure.
+    echo "unneeded deps for $obj:"
+    echo "$unneeded_deps" | sed 's/^/  /'
+  fi
+done
+exit $st
+
+# vi:sw=2: