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