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