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      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 (at] 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:
     95