[babeltrace.git] / m4 / ax_prog_bison_version.m4

# ===========================================================================
#   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 $YACC is not
#   set (for example by running AC_PROG_YACC or AC_PATH_PROG) the macro
#   will fail.
#
#   Example:
#
#     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.
#
#   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 4

AC_DEFUN([AX_PROG_BISON_VERSION],[
    AC_REQUIRE([AC_PROG_SED])
    AC_REQUIRE([AC_PROG_GREP])

     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=`$YACC --version 2>&1 \
          | $SED -n -e '/bison (GNU Bison)/b inspect
b
: inspect
s/.* (\{0,1\}\([0-9]*\.[0-9]*\.[0-9]*\))\{0,1\}.*/\1/;p'`
        changequote([,])
        AC_MSG_RESULT($bison_version)

	AC_SUBST([BISON_VERSION],[$bison_version])

        AX_COMPARE_VERSION([$bison_version],[ge],[$ax_bison_version],[
	    :
            $2
        ],[
	    :
            $3
        ])
    ],[
        AC_MSG_WARN([could not find bison])
        $3
    ])
])
Commit	Line	Data
	1	# ===========================================================================
	2	# https://www.gnu.org/software/autoconf-archive/ax_prog_bison_version.html
	3	# ===========================================================================
	4	#
	5	# SYNOPSIS
	6	#
	7	# AX_PROG_BISON_VERSION([VERSION],[ACTION-IF-TRUE],[ACTION-IF-FALSE])
	8	#
	9	# DESCRIPTION
	10	#
	11	# Makes sure that bison 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 $YACC is not
	15	# set (for example by running AC_PROG_YACC or AC_PATH_PROG) the macro
	16	# will fail.
	17	#
	18	# Example:
	19	#
	20	# AC_PROG_YACC
	21	# AX_PROG_BISON_VERSION([3.0.2],[ ... ],[ ... ])
	22	#
	23	# This will check to make sure that the bison you have is at least version
	24	# 3.0.2 or greater.
	25	#
	26	# NOTE: This macro uses the $YACC variable to perform the check, if it's
	27	# empty it will failover to the $BISON variable for backwards compatibility.
	28	#
	29	# LICENSE
	30	#
	31	# Copyright (c) 2015 Jonathan Rajotte-Julien <jonathan.rajotte-julien@efficios.com>
	32	# 2017 Michael Jeanson <mjeanson@efficios.com>
	33	#
	34	# Copying and distribution of this file, with or without modification, are
	35	# permitted in any medium without royalty provided the copyright notice
	36	# and this notice are preserved. This file is offered as-is, without any
	37	# warranty.
	38
	39	#serial 4
	40
	41	AC_DEFUN([AX_PROG_BISON_VERSION],[
	42	AC_REQUIRE([AC_PROG_SED])
	43	AC_REQUIRE([AC_PROG_GREP])
	44
	45	AS_IF([test -z "$YACC"],[
	46	AS_IF([test -n "$BISON"],[
	47	YACC=$BISON
	48	])
	49	])
	50
	51	AS_IF([test -n "$YACC"],[
	52	ax_bison_version="$1"
	53
	54	AC_MSG_CHECKING([for bison version])
	55	changequote(<<,>>)
	56	bison_version=`$YACC --version 2>&1 \
	57	\| $SED -n -e '/bison (GNU Bison)/b inspect
	58	b
	59	: inspect
	60	s/.* (\{0,1\}\([0-9]\.[0-9]\.[0-9]\))\{0,1\}./\1/;p'`
	61	changequote([,])
	62	AC_MSG_RESULT($bison_version)
	63
	64	AC_SUBST([BISON_VERSION],[$bison_version])
	65
	66	AX_COMPARE_VERSION([$bison_version],[ge],[$ax_bison_version],[
	67	:
	68	$2
	69	],[
	70	:
	71	$3
	72	])
	73	],[
	74	AC_MSG_WARN([could not find bison])
	75	$3
	76	])
	77	])