Macro: ac_define_versionlevel

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# ac_define_versionlevel

## Synopsis

`AC_DEFINE_VERSIONLEVEL(VARNAME [,VERSION [, DESCRIPTION]])`

## Version

1.2 (2001/11/02) 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_DEFINE_VERSIONLEVEL(MYPKG_VERSION)

the config.h created from autoheader's config.h.in will contain... /* mypkg versionlevel */ #define MYPKG_VERSION 4120003

the MYKG_VERSION will be defined as both a shell-variable and AC_DEFINE

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_DEFINE_VERSIONLEVEL,
    [
    ac_versionlevel_strdf=`echo ifelse($2, , $VERSION, $2) | sed -e 's:[[A-Z-]]*:.:' -e 's:[[^0-9.]]::g' -e 's:^[[.]]*::'`
    AC_MSG_CHECKING(versionlevel $ac_versionlevel_strdf)
    case $ac_versionlevel_strdf in
     *.*.*.|*.*.*.*) :
     ac_versionlevel_major=`echo $ac_versionlevel_strdf`
     ac_versionlevel_minor=`echo $ac_versionlevel_major | sed -e 's/[[^.]]*[[.]]//'`
     ac_versionlevel_patch=`echo $ac_versionlevel_minor | sed -e 's/[[^.]]*[[.]]//'`
     ac_versionlevel_major=`echo $ac_versionlevel_major | sed -e 's/[[.]].*//'`
     ac_versionlevel_minor=`echo $ac_versionlevel_minor | sed -e 's/[[.]].*//'`
     ac_versionlevel_patch=`echo $ac_versionlevel_patch | sed -e 's/[[.]].*//'`
     $1=`expr $ac_versionlevel_major '*' 1000000 \
            + $ac_versionlevel_minor '*'   10000 \
            + $ac_versionlevel_patch \
    	+ 1` ;;
     *.*.*) :
     ac_versionlevel_major=`echo $ac_versionlevel_strdf`
     ac_versionlevel_minor=`echo $ac_versionlevel_major | sed -e 's/[[^.]]*[[.]]//'`
     ac_versionlevel_patch=`echo $ac_versionlevel_minor | sed -e 's/[[^.]]*[[.]]//'`
     ac_versionlevel_major=`echo $ac_versionlevel_major | sed -e 's/[[.]].*//'`
     ac_versionlevel_minor=`echo $ac_versionlevel_minor | sed -e 's/[[.]].*//'`
     ac_versionlevel_patch=`echo $ac_versionlevel_patch | sed -e 's/[[.]].*//'`
     $1=`expr $ac_versionlevel_major '*' 1000000 \
            + $ac_versionlevel_minor '*'   10000 \
            + $ac_versionlevel_patch`               ;;
     *.*.) :
     ac_versionlevel_major=`echo $ac_versionlevel_strdf`
     ac_versionlevel_minor=`echo $ac_versionlevel_major | sed -e 's/[[^.]]*[[.]]//'`
     ac_versionlevel_major=`echo $ac_versionlevel_major | sed -e 's/[[.]].*//'`
     ac_versionlevel_minor=`echo $ac_versionlevel_minor | sed -e 's/[[.]].*//'`
     ac_versionlevel_patch=0
     $1=`expr $ac_versionlevel_major '*' 1000000 \
            + $ac_versionlevel_minor '*'   10000 \
    	+ 1000 \
            + $ac_versionlevel_patch`               ;;
     *.*) :
     ac_versionlevel_major=`echo $ac_versionlevel_strdf`
     ac_versionlevel_minor=`echo $ac_versionlevel_major | sed -e 's/[[^.]]*[[.]]//'`
     ac_versionlevel_major=`echo $ac_versionlevel_major | sed -e 's/[[.]].*//'`
     ac_versionlevel_minor=`echo $ac_versionlevel_minor | sed -e 's/[[.]].*//'`
     ac_versionlevel_patch=0
     $1=`expr $ac_versionlevel_major '*' 1000000 \
            + $ac_versionlevel_minor '*'   10000 \
            + $ac_versionlevel_patch`               ;;
     *.) :
     ac_versionlevel_major=0
     ac_versionlevel_minor=`echo $ac_versionlevel_strdf`
     ac_versionlevel_minor=`echo $ac_versionlevel_minor | sed -e 's/[[.]].*//'`
     ac_versionlevel_patch=0
     $1=`expr $ac_versionlevel_major '*' 1000000 \
            + $ac_versionlevel_minor '*'   10000 \
    	+ 1000 \
            + $ac_versionlevel_patch`               ;;
     *) :
     ac_versionlevel_major=0
     ac_versionlevel_minor=`echo $ac_versionlevel_strdf`
     ac_versionlevel_minor=`echo $ac_versionlevel_minor | sed -e 's/[[.]].*//'`
     ac_versionlevel_patch=0
     $1=`expr $ac_versionlevel_major '*' 1000000 \
            + $ac_versionlevel_minor '*'   10000 \
            + $ac_versionlevel_patch`               ;;
    esac
    AC_MSG_RESULT($[$1])
    AC_DEFINE_UNQUOTED( $1, $[$1], ifelse( $3, , $PACKAGE versionlevel, $3))
    ])