1# =========================================================================== 2# https://www.gnu.org/software/autoconf-archive/ax_prog_flex_version.html 3# =========================================================================== 4# 5# SYNOPSIS 6# 7# AX_PROG_FLEX_VERSION([VERSION],[ACTION-IF-TRUE],[ACTION-IF-FALSE]) 8# 9# DESCRIPTION 10# 11# Makes sure that flex version is greater or equal to the version 12# indicated. If true the shell commands in ACTION-IF-TRUE are executed. If 13# not the shell commands in commands in ACTION-IF-TRUE are executed. If 14# not the shell commands in ACTION-IF-FALSE are run. Note if $FLEX is not 15# set (for example by running AC_CHECK_PROG or AC_PATH_PROG) the macro 16# will fail. 17# 18# Example: 19# 20# AC_PATH_PROG([FLEX],[flex]) 21# AX_PROG_FLEX_VERSION([2.5.39],[ ... ],[ ... ]) 22# 23# This will check to make sure that the flex you have is at least version 24# 2.5.39 or greater. 25# 26# NOTE: This macro uses the $FLEX variable to perform the check. 27# 28# LICENSE 29# 30# Copyright (c) 2015 Jonathan Rajotte-Julien <jonathan.rajotte-julien@efficios.com> 31# 32# Copying and distribution of this file, with or without modification, are 33# permitted in any medium without royalty provided the copyright notice 34# and this notice are preserved. This file is offered as-is, without any 35# warranty. 36 37#serial 2 38 39AC_DEFUN([AX_PROG_FLEX_VERSION],[ 40 AC_REQUIRE([AC_PROG_SED]) 41 AC_REQUIRE([AC_PROG_GREP]) 42 43 AS_IF([test -n "$FLEX"],[ 44 ax_flex_version="$1" 45 46 AC_MSG_CHECKING([for flex version]) 47 changequote(<<,>>) 48 flex_version=`$FLEX --version 2>&1 \ 49 | $SED -n -e '/flex /s/.* (\{0,1\}\([0-9]*\.[0-9]*\.[0-9]*\))\{0,1\}.*/\1/;p'` 50 changequote([,]) 51 AC_MSG_RESULT($flex_version) 52 53 AC_SUBST([FLEX_VERSION],[$flex_version]) 54 55 AX_COMPARE_VERSION([$flex_version],[ge],[$ax_flex_version],[ 56 : 57 $2 58 ],[ 59 : 60 $3 61 ]) 62 ],[ 63 AC_MSG_WARN([could not find flex]) 64 $3 65 ]) 66]) 67