# ===========================================================================
-# http://www.gnu.org/software/autoconf-archive/ax_prog_flex_version.html
+# https://www.gnu.org/software/autoconf-archive/ax_prog_flex_version.html
# ===========================================================================
#
# SYNOPSIS
# Makes sure that flex version is greater or equal to the version
# indicated. If true the shell commands in ACTION-IF-TRUE are executed. If
# not the shell commands in commands in ACTION-IF-TRUE are executed. If
-# not the shell commands in ACTION-IF-FALSE are run. Note if $FLEX is not
-# set (for example by running AC_CHECK_PROG or AC_PATH_PROG) the macro
+# not the shell commands in ACTION-IF-FALSE are run. Note if $LEX is not
+# set (for example by running AC_PROG_LEX or AC_PATH_PROG) the macro
# will fail.
#
# Example:
#
-# AC_PATH_PROG([FLEX],[flex])
+# AC_PROG_LEX
# AX_PROG_FLEX_VERSION([2.5.39],[ ... ],[ ... ])
#
# This will check to make sure that the flex you have is at least version
# 2.5.39 or greater.
#
-# NOTE: This macro uses the $FLEX variable to perform the check.
+# NOTE: This macro uses the $LEX variable to perform the check, if it's
+# empty it will failover to the $FLEX variable for backwards compatibility.
#
# LICENSE
#
# Copyright (c) 2015 Jonathan Rajotte-Julien <jonathan.rajotte-julien@efficios.com>
+# 2017 Michael Jeanson <mjeanson@efficios.com>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
-#serial 1
+#serial 3
AC_DEFUN([AX_PROG_FLEX_VERSION],[
AC_REQUIRE([AC_PROG_SED])
AC_REQUIRE([AC_PROG_GREP])
- AS_IF([test -n "$FLEX"],[
+ AS_IF([test -z "$LEX"],[
+ AS_IF([test -n "$FLEX"],[
+ LEX=$FLEX
+ ])
+ ])
+
+ AS_IF([test -n "$LEX"],[
ax_flex_version="$1"
AC_MSG_CHECKING([for flex version])
changequote(<<,>>)
- flex_version=`$FLEX --version 2>&1 \
+ flex_version=`$LEX --version 2>&1 \
| $SED -n -e '/flex /b inspect
b
: inspect