ffmpeg/compat/windows/makedef

   1 #!/bin/sh
   2
   3 # Copyright (c) 2013, Derek Buitenhuis
   4 #
   5 # Permission to use, copy, modify, and/or distribute this software for any
   6 # purpose with or without fee is hereby granted, provided that the above
   7 # copyright notice and this permission notice appear in all copies.
   8 #
   9 # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16
  17 # mktemp isn't POSIX, so supply an implementation
  18 mktemp() {
  19     echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
  20 }
  21
  22 if [ $# -lt 2 ]; then
  23     echo "Usage: makedef <version_script> <objects>" >&2
  24     exit 0
  25 fi
  26
  27 vscript=$1
  28 shift
  29
  30 if [ ! -f "$vscript" ]; then
  31     echo "Version script does not exist" >&2
  32     exit 1
  33 fi
  34
  35 for object in "$@"; do
  36     if [ ! -f "$object" ]; then
  37         echo "Object does not exist: ${object}" >&2
  38         exit 1
  39     fi
  40 done
  41
  42 # Create a lib temporarily to dump symbols from.
  43 # It's just much easier to do it this way
  44 libname=$(mktemp -u "library").lib
  45
  46 trap 'rm -f -- $libname' EXIT
  47
  48 lib -out:${libname} $@ >/dev/null
  49 if [ $? != 0 ]; then
  50     echo "Could not create temporary library." >&2
  51     exit 1
  52 fi
  53
  54 IFS='
  55 '
  56
  57 # Determine if we're building for x86 or x86_64 and
  58 # set the symbol prefix accordingly.
  59 prefix=""
  60 arch=$(dumpbin -headers ${libname} |
  61        tr '\t' ' ' |
  62        grep '^ \+.\+machine \+(.\+)' |
  63        head -1 |
  64        sed -e 's/^ \{1,\}.\{1,\} \{1,\}machine \{1,\}(\(...\)).*/\1/')
  65
  66 if [ "${arch}" = "x86" ]; then
  67     prefix="_"
  68 else
  69     if [ "${arch}" != "ARM" ] && [ "${arch}" != "x64" ]; then
  70         echo "Unknown machine type." >&2
  71         exit 1
  72     fi
  73 fi
  74
  75 started=0
  76 regex="none"
  77
  78 for line in $(cat ${vscript} | tr '\t' ' '); do
  79     # We only care about global symbols
  80     echo "${line}" | grep -q '^ \+global:'
  81     if [ $? = 0 ]; then
  82         started=1
  83         line=$(echo "${line}" | sed -e 's/^ \{1,\}global: *//')
  84     else
  85         echo "${line}" | grep -q '^ \+local:'
  86         if [ $? = 0 ]; then
  87             started=0
  88         fi
  89     fi
  90
  91     if [ ${started} = 0 ]; then
  92         continue
  93     fi
  94
  95     # Handle multiple symbols on one line
  96     IFS=';'
  97
  98     # Work around stupid expansion to filenames
  99     line=$(echo "${line}" | sed -e 's/\*/.\\+/g')
 100     for exp in ${line}; do
 101         # Remove leading and trailing whitespace
 102         exp=$(echo "${exp}" | sed -e 's/^ *//' -e 's/ *$//')
 103
 104         if [ "${regex}" = "none" ]; then
 105             regex="${exp}"
 106         else
 107             regex="${regex};${exp}"
 108         fi
 109     done
 110
 111     IFS='
 112 '
 113 done
 114
 115 dump=$(dumpbin -linkermember:1 ${libname})
 116
 117 rm ${libname}
 118
 119 IFS=';'
 120 list=""
 121 for exp in ${regex}; do
 122     list="${list}"'
 123 '$(echo "${dump}" |
 124           sed -e '/public symbols/,$!d' -e '/^ \{1,\}Summary/,$d' -e "s/ \{1,\}${prefix}/ /" -e 's/ \{1,\}/ /g' |
 125           tail -n +2 |
 126           cut -d' ' -f3 |
 127           grep "^${exp}" |
 128           sed -e 's/^/    /')
 129 done
 130
 131 echo "EXPORTS"
 132 echo "${list}" | sort | uniq | tail -n +2