# Libarchive 2.8 == libtool interface 10 = 2 + 8
# Libarchive 3.0 == libtool interface 11 (assumes there's no libarchive 2.9)
# Libarchive 3.x == libtool interface 11 + x
-ARCHIVE_LIBTOOL_MAJOR=`echo $((11 + ${ARCHIVE_MINOR}))`
+ARCHIVE_INTERFACE=`echo $((11 + ${ARCHIVE_MINOR}))`
# Libarchive revision is bumped on any source change === libtool revision
ARCHIVE_REVISION=$(( LIBARCHIVE_VERSION_N() % 1000 ))
# Libarchive minor is bumped on any interface addition === libtool age
-ARCHIVE_LIBTOOL_VERSION=$ARCHIVE_LIBTOOL_MAJOR:$ARCHIVE_REVISION:$ARCHIVE_MINOR
+ARCHIVE_LIBTOOL_VERSION=$ARCHIVE_INTERFACE:$ARCHIVE_REVISION:$ARCHIVE_MINOR
# Stick the version numbers into config.h
AC_DEFINE([LIBARCHIVE_VERSION_STRING],"LIBARCHIVE_VERSION_S()",