version.sh

ffmpeg的完整源代码和作者自己写的文档。不但有在Linux的工程哦

#!/bin/sh

svn_revision=`cd "$1" && LC_ALL=C svn info 2> /dev/null | grep Revision | cut -d' ' -f2`
test $svn_revision || svn_revision=`cd "$1" && grep revision .svn/entries 2>/dev/null | cut -d '"' -f2`
test $svn_revision || svn_revision=`cd "$1" && sed -n -e '/^dir$/{n;p;q}' .svn/entries 2>/dev/null`
test $svn_revision || svn_revision=UNKNOWN

NEW_REVISION="#define FFMPEG_VERSION \"SVN-r$svn_revision\""
OLD_REVISION=`cat version.h 2> /dev/null`

# Update version.h only on revision changes to avoid spurious rebuilds
if test "$NEW_REVISION" != "$OLD_REVISION"; then
    echo "$NEW_REVISION" > version.h
fi