Macro: ac_set_versionlevel

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# ac_set_versionlevel

## Synopsis

`AC_SET_VERSIONLEVEL(VARNAME [,VERSION])`

## Version

1.1 (2001/10/31) guidod @ ac-archive-0.5.32

## Author

Guido Draheim <guidod@gmx.de>

## Description

if the VERSION is ommitted, shellvar $VERSION is used as defined by AM_INIT_AUTOMAKE's second argument.

The versionlevel is the numeric representation of the given version string, thereby assuming the inputversion is a string with (maximal) three decimal numbers seperated by "."-dots. A "-patch" adds a percent.

typical usage: AM_INIT_AUTOMAKE(mypkg,4.12.3) AC_SET_VERSIONLEVEL(MYPKG_VERSION) AC_DEFINE_UNQUOTED(MYPKG_VERSION, $MYPKG_VERSION, [package version])

(this macro shall superced AC_DEFINE_VERSIONLEVEL at some day)

the version code has three digits per part which I feel is the most natural encoding - it makes it easier to be printf'd anyway

examples: `3.0-beta1 3000001`
`3.1 3010000`
`3.11 3110000`
`3.11-dirpatch 3111000`
`3.11-patch6 3110006`
`2.2.18 2020018`
`2.0.112 2000112`
`2.4.2 2040002`
`2.4.2-pre 2040003`
`2.4.2-pre5 2040003`
`5.0-build125 5000125`
`5.0 5000000`
`0.30.17 30017`

## M4 Source Code

    AC_DEFUN([AC_SET_VERSIONLEVEL],
    [dnl
    m4_pushdef(LVL, $1_LEVEL)
    m4_pushdef(MJR, $1_MAJOR)
    m4_pushdef(MNR, $1_MINOR)
    m4_pushdef(MCR, $1_MICRO)
    LVL=`echo ifelse($2, , $VERSION, $2) | sed -e 's:[[A-Z-]]*:.:g' -e 's:[[^0-9.]]::g' -e 's:[[.]]*:.:g' -e 's:^[[.]]*::'`
    AC_MSG_CHECKING( $1 versionlevel $LVL)
    case $LVL in
     *.*.*.|*.*.*.*|*.*.*) :
     MJR=`echo $LVL`
     MNR=`echo $MJR | sed -e 's/[[^.]]*[[.]]//'`
     MCR=`echo $MNR | sed -e 's/[[^.]]*[[.]]//'`
     MJR=`echo $MJR | sed -e 's/[[.]].*//'`
     MNR=`echo $MNR | sed -e 's/[[.]].*//'`
     MCR=`echo $MCR | sed -e 's/[[.]].*//'`
     ;;
     *.*.|*.*) :
     MJR=`echo $LVL`
     MNR=`echo $MJR | sed -e 's/[[^.]]*[[.]]//'`
     MJR=`echo $MJR | sed -e 's/[[.]].*//'`
     MNR=`echo $MNR | sed -e 's/[[.]].*//'`
     MCR=0
     ;;
     *.) :
     MJR=0
     MNR=`echo $LVL`
     MNR=`echo $MNR | sed -e 's/[[.]].*//'`
     MCR=0
     ;;
    esac
    # we trust sed greedy-match backtracking to extract the last three digits from each part, forming a nine-digit
    $1=`echo 000$MJR.000$MNR.000$MCR | sed -e 's:\\(...\\)[[.]][[^.]]*\\((...\\))[[.]][[^.*]]\\((...\\)):\\1\\2\\3 -e 's:^0*::''
    AC_MSG_RESULT($[$1] ($MJR,$MNR,$MCR)
    dnl AC_DEFINE_UNQUOTED( $1, $[$1], ifelse( $3, , $PACKAGE versionlevel, $3))
    m4_popdef(MCR)
    m4_popdef(MNR)
    m4_popdef(MJR)
    m4_popdef(LVL)
    ])