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# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_numeric_namedlevel.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_NUMERIC_NAMEDLEVEL(VARNAME [,FROMVAR [,DEFAULT [,YESLEVEL]]])
#
# DESCRIPTION
#
# The levelstring FROMVAR is expanded and checked for verbal names that
# will map on to eight different levels - the VARNAME will receive this
# numeric level where "all" maps to 7 (lower three bits set) higher levels
# for 8 and 9 exist too. This macro is a nice helper to convert user input
# of a --with-opt=level into a numeric form that can be simply pushed as a
# #define like with AC_DEFINE:
#
# default YESLEVEL = 2 /* including unknown levelspec */
# default DEFAULT = 0 /* when named level is empty */
# default FROMVAR = VARNAME
#
# The DEFAULT value is used if the NAMED levelstring has become empty and
# it is copied without further conversion - a default of "0" is used if
# absent - identical to "no". A "yes" will be set to the YESLEVEL - and
# note that "yes" has "2" as its default value not "1". (which comes from
# its original use to set a "gcc -O2").
#
# the mnemonic names are:
#
# 9| insane |ultrasome|experimentalplus
# 8| ultra |ultra|experimental)
# 7| all |muchmore|somemanymore|manymoreplus
# 6| most |manymore|most)
# 5| strict |somemore|almost
# 4| more |more
# 3| extra |manyplus|plusmuch|somemany|plusmany
# 2| many |many|much|(yes)
# 1| some |some|plus
#
# note that a level can be constructed of (some|plus) = bit-0, (many|much)
# = bit-1, (more) = bit-2, (ultra|experimental) = bit-3 at least in a
# left-to-right order, ie. plusmanymore=7
#
# Example usage:
#
# AX_NUMERIC_NAMEDLEVEL(OPTLEVEL,with_optlevel,1,3)
# AC_DEFINE(OPTLEVEL)
# test "$GCC" = "yes" && CFLAGS="$CFLAGS -O$OPTLEVEL)
#
# LICENSE
#
# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 12
AU_ALIAS([AC_NUMERIC_NAMEDLEVEL], [AX_NUMERIC_NAMEDLEVEL])
AC_DEFUN([AX_NUMERIC_NAMEDLEVEL],
[dnl the names to be defined...
$1="ifelse($1,,[$]$2,[$]$1)" ; $1="[$]$1"
$1="[$]$1" ; $1="[$]$1"
if test "_[$]$1" = "_" ; then
$1="ifelse([$3],,0,[$3])"
elif test "_[$]$1" = "_yes" ; then
$1="ifelse([$4],,2,[$4])"
else
$1=`echo [$]$1 | sed -e 's,some,plus,' -e 's,experimental,ultra,' -e 's,over,ultra,' -e 's,much,many,'`
case "[$]$1" in
0*|1*|2*|3*|4*|5*|6*|7*|8*|9*|-*|+*) ;; # leave as is
insane|ultraplus|plusultra) $1="9" ;;
ultra) $1="8" ;;
manymoreplus|manyplusmore|plusmanymore|all) $1="7" ;;
moremanyplus|moreplusmany|plusmoremany) $1="7" ;;
manymore|moremany|most) $1="6" ;;
somemore|moresome|almost) $1="5" ;;
more) $1="4" ;;
manyplus|plusmany|extra) $1="3" ;;
many) $1="2" ;;
plus) $1="1" ;;
no) $1="0" ;;
yes) $1="ifelse([$4],,2,[$4])" ;;
*) $1="ifelse([$3],,1,[$3])" ;; # for other unknown stuff.
esac
fi
])
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