Dogcows Code - chaz/yoink/blob - link.sh

   1 #!/bin/sh
   2
   3 #
   4 # Yoink
   5 # Run this script to link the executable with fewer direct dependencies.
   6 #
   7 # You shouldn't call this directly; instead, use the configure script's
   8 # --enable-link-sh option and run make normally.  This isn't enabled by
   9 # default because there is the potential for runtime linking problems on
  10 # some platforms.  If you have a newer version of GCC, you should prefer
  11 # the --as-needed linker flag over this method, though they both should
  12 # accomplish the same thing.
  13 #
  14 # This script was adapted from some public domain code written by Bram
  15 # Moolenaar for Vim.  The only input needed is the link command in the
  16 # variable LINK.  It is expected that the linker will return an error code
  17 # or this will not work.  The script caches the test results in the
  18 # `.link/link.sed' file; delete that file if you want to redetermine the
  19 # required direct dependencies.
  20 #
  21
  22
  23 # List here any libraries that are known to not be needed on some platform.
  24 libraries="\
  25         atk-1.0 \
  26         cairo \
  27         fontconfig \
  28         freetype \
  29         gdk-x11-2.0 \
  30         gio-2.0 \
  31         glib-2.0 \
  32         gmodule-2.0 \
  33         ogg \
  34         pango-1.0 \
  35         pangocairo-1.0 \
  36         pangoft2-1.0 \
  37         pthread \
  38         vorbis \
  39         $THE_END"
  40
  41
  42 linkdir=".link"
  43 logfile="$linkdir/link.log"
  44 sedfile="$linkdir/link.sed"
  45
  46 workdir=$(mktemp -d tmp.XXXXXXXX)
  47 cmdfile="$workdir/link.cmd"
  48 runfile="$workdir/link.run"
  49
  50 tmpfile1="$workdir/link.tmp1"
  51 tmpfile2="$workdir/link.tmp2"
  52 tmpfile3="$workdir/link.tmp3"
  53
  54
  55 printlog()
  56 {
  57         echo "link.sh: $@"
  58 }
  59
  60 echo "$LINK " >$cmdfile
  61 exitcode=0
  62
  63
  64 if test -f $sedfile
  65 then
  66         printlog "The file $sedfile exists, which is now going to be used."
  67         printlog "If linking fails, try deleting the $sedfile file."
  68         printlog "If that fails, try creating an empty $sedfile file."
  69         printlog "If that fails, configure the package with --disable-link-sh."
  70 else
  71         cat $cmdfile
  72         if sh $cmdfile
  73         then
  74                 mkdir -p $linkdir
  75                 touch $sedfile
  76                 cp $cmdfile $runfile
  77                 for libname in $libraries
  78                 do
  79                         cont=yes
  80                         while test -n "$cont"
  81                         do
  82                                 if grep "l$libname " $runfile >/dev/null
  83                                 then
  84                                         if test ! -f $tmpfile1
  85                                         then
  86                                                 printlog "Full linking works; now the fun begins."
  87                                                 printlog "See $logfile for details."
  88                                                 rm -f $logfile
  89                                         fi
  90                                         echo "s/-l$libname  *//" >$tmpfile1
  91                                         sed -f $sedfile <$cmdfile | sed -f $tmpfile1 >$runfile
  92                                         # keep the last -lm; this is supposedly needed by HP-UX
  93                                         if test $libname != "m" || grep "lm " $runfile >/dev/null
  94                                         then
  95                                                 printlog "Trying to remove the $libname library..."
  96                                                 cat $runfile >>$logfile
  97                                                 if sh $runfile >>$logfile 2>&1
  98                                                 then
  99                                                         printlog "We don't need the $libname library!"
 100                                                         cat $tmpfile1 >>$sedfile
 101                                                         continue
 102                                                 else
 103                                                         printlog "We DO need the $libname library."
 104                                                 fi
 105                                         fi
 106                                 fi
 107                                 cont=
 108                                 cp $cmdfile $runfile
 109                         done
 110                 done
 111                 if test ! -f $tmpfile1
 112                 then
 113                         printlog "Linked fine, no libraries can be removed."
 114                         touch $tmpfile3
 115                 fi
 116         else
 117                 exitcode=$?
 118         fi
 119 fi
 120
 121
 122 if test -s $sedfile
 123 then
 124         printlog "Using $sedfile file to remove a few libraries."
 125         sed -f $sedfile <$cmdfile >$runfile
 126         cat $runfile
 127         if sh $runfile
 128         then
 129                 exitcode=0
 130                 printlog "Linked fine with a few libraries removed."
 131         else
 132                 exitcode=$?
 133                 printlog "Linking failed, making $sedfile empty and trying again."
 134                 mv -f $sedfile $tmpfile2
 135                 touch $sedfile
 136         fi
 137 fi
 138
 139 if test -f $sedfile -a ! -s $sedfile -a ! -f $tmpfile3
 140 then
 141         printlog "Using unmodified link command."
 142         cat $cmdfile
 143         if sh $cmdfile
 144         then
 145                 exitcode=0
 146                 printlog "Linked OK."
 147         else
 148                 exitcode=$?
 149                 if test -f $tmpfile2
 150                 then
 151                         printlog "Linking doesn't work at all, removing $sedfile."
 152                         rm -f $sedfile
 153                 fi
 154         fi
 155 fi
 156
 157
 158 rm -rf "$workdir"
 159 exit $exitcode
 160