contrib/check_makefile_deps.sh

   1 #! /bin/sh
   2 #
   3 # Check for accurate dependencies in gcc/Makefile.in.
   4 #
   5 # Copyright (C) 2008-2024 Free Software Foundation, Inc.
   6 # Written by Ralf Wildenhues <Ralf.Wildenhues@gmx.de>.
   7 #
   8 # This script is Free Software, and it can be copied, distributed and
   9 # modified as defined in the GNU General Public License.  A copy of
  10 # its license can be downloaded from http://www.gnu.org/copyleft/gpl.html
  11 #
  12 # Start this script in an up to date build-tree/gcc directory.
  13 # Using it in stage1 only works if the host compiler is GCC.
  14
  15 # To continue an interrupted check, make sure there are no *.o.backup
  16 # files lying around (i.e., move them back to their original name),
  17 # and set $start_after to the name of the last object that should be skipped.
  18 start_after=
  19
  20 # Skip some objects unconditionally; make sure each name in this list is
  21 # surrounded by spaces.
  22 skip=" crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o crtfastmath.o crtprec64.o crtprec80.o crtprec32.o ecrti.o ecrtn.o ncrti.o ncrtn.o "
  23
  24 # Files which show up as dependencies other than through unconditional #include.
  25 # This is an egrep pattern.
  26 hidden_dep_files='(BASE-VER|DATESTAMP|DEV-PHASE|Makefile|xcoffout\.h|basic-block\.h|bconfig\.h)$'
  27
  28 : ${MAKE=make}
  29 : ${EGREP="grep -E"}
  30
  31 # -------------------------------------------------------------------------
  32 # There should be no need for changes beyond this point.
  33
  34 set -e
  35 st=0
  36
  37 if test -f c-family/c-common.o; then :; else
  38   echo "$0: rerun in an up to date build-tree/gcc directory" >&2
  39   exit 1
  40 fi
  41
  42 for obj in *.o
  43 do
  44   if test -n "$start_after"; then
  45     if test $obj = $start_after; then
  46       start_after=
  47     fi
  48     continue
  49   fi
  50   case $skip in *\ $obj\ *) continue ;; esac
  51
  52   mv -f $obj $obj.backup
  53   ${MAKE} $obj CFLAGS='-MM -MF depfile'
  54   mv -f $obj.backup $obj
  55   ${MAKE} -t
  56   LC_ALL=C ${MAKE} -d $obj >make-d-log
  57   hdrs=`cat depfile`
  58   for hdr in $hdrs; do
  59     case $hdr in
  60       *: | *.o | \\ | /* ) ;;
  61       *)
  62         echo $hdr ;;
  63     esac
  64   done < depfile |
  65   LC_ALL=C sort -u > hdrs
  66
  67
  68   sed -n '/.*Prerequisite..\([^ ]*\). is newer than target .'"$obj"'.*/s//\1/p' \
  69     < make-d-log |
  70   LC_ALL=C sort -u > not-up-to-date
  71   if test -s not-up-to-date; then
  72     st=1
  73     echo "$0: error: prerequisites for $obj are not up to date:" >&2
  74     cat not-up-to-date >&2
  75   fi
  76   sed -n '/.*Prerequisite..\([^ ]*\). is older than target .'"$obj"'.*/s//\1/p' \
  77     < make-d-log |
  78   LC_ALL=C sort -u > deps
  79   missing_deps=`LC_ALL=C join -v 1 hdrs deps`
  80   unneeded_deps=`LC_ALL=C join -v 2 hdrs deps | $EGREP -v "$hidden_dep_files" || :`
  81   if test -n "$missing_deps"; then
  82     st=1
  83     echo "missing deps for $obj:"
  84     echo "$missing_deps" | sed 's/^/  /'
  85   fi
  86   if test -n "$unneeded_deps"; then
  87     # unneeded dependencies are not a big problem, so they cause no failure.
  88     echo "unneeded deps for $obj:"
  89     echo "$unneeded_deps" | sed 's/^/  /'
  90   fi
  91 done
  92 exit $st
  93
  94 # vi:sw=2: