+# ===========================================================================
+# https://www.gnu.org/software/autoconf-archive/ax_prog_bison_version.html
+# ===========================================================================
+#
# SYNOPSIS
#
# AX_PROG_BISON_VERSION([VERSION],[ACTION-IF-TRUE],[ACTION-IF-FALSE])
#
# DESCRIPTION
#
-# Makes sure that bison 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 $BISON is not set (for example
-# by running AC_CHECK_PROG or AC_PATH_PROG) the macro will fail.
+# Makes sure that bison 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 $YACC is not
+# set (for example by running AC_PROG_YACC or AC_PATH_PROG) the macro
+# will fail.
#
# Example:
#
-# AC_PATH_PROG([BISON],[bison])
+# AC_PROG_YACC
# AX_PROG_BISON_VERSION([3.0.2],[ ... ],[ ... ])
#
-# This will check to make sure that the bison you have is at least
-# version 3.0.2 or greater.
+# This will check to make sure that the bison you have is at least version
+# 3.0.2 or greater.
#
-# NOTE: This macro uses the $BISON variable to perform the check.
+# NOTE: This macro uses the $YACC variable to perform the check, if it's
+# empty it will failover to the $BISON variable for backwards compatibility.
#
# LICENSE
#
# Copyright (c) 2015 Jonathan Rajotte-Julien <jonathan.rajotte-julien@efficios.com>
+# 2017 Michael Jeanson <mjeanson@efficios.com>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
-#serial 12
+#serial 4
AC_DEFUN([AX_PROG_BISON_VERSION],[
AC_REQUIRE([AC_PROG_SED])
AC_REQUIRE([AC_PROG_GREP])
- AS_IF([test -n "$BISON"],[
+ AS_IF([test -z "$YACC"],[
+ AS_IF([test -n "$BISON"],[
+ YACC=$BISON
+ ])
+ ])
+
+ AS_IF([test -n "$YACC"],[
ax_bison_version="$1"
AC_MSG_CHECKING([for bison version])
changequote(<<,>>)
- bison_version=`$BISON --version 2>&1 \
+ bison_version=`$YACC --version 2>&1 \
| $SED -n -e '/bison (GNU Bison)/b inspect
b
: inspect