forked from KolibriOS/kolibrios
72 lines
2.9 KiB
Plaintext
72 lines
2.9 KiB
Plaintext
# ===========================================================================
|
|
# http://www.gnu.org/software/autoconf-archive/ax_prog_bison.html
|
|
# ===========================================================================
|
|
#
|
|
# SYNOPSIS
|
|
#
|
|
# AX_PROG_BISON(ACTION-IF-TRUE,ACTION-IF-FALSE)
|
|
#
|
|
# DESCRIPTION
|
|
#
|
|
# Check whether bison is the parser generator. Run ACTION-IF-TRUE if
|
|
# successful, ACTION-IF-FALSE otherwise
|
|
#
|
|
# LICENSE
|
|
#
|
|
# Copyright (c) 2009 Francesco Salvestrini <salvestrini@users.sourceforge.net>
|
|
# Copyright (c) 2010 Diego Elio Petteno` <flameeyes@gmail.com>
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify it
|
|
# under the terms of the GNU General Public License as published by the
|
|
# Free Software Foundation; either version 2 of the License, or (at your
|
|
# option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful, but
|
|
# WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
|
|
# Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License along
|
|
# with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
#
|
|
# As a special exception, the respective Autoconf Macro's copyright owner
|
|
# gives unlimited permission to copy, distribute and modify the configure
|
|
# scripts that are the output of Autoconf when processing the Macro. You
|
|
# need not follow the terms of the GNU General Public License when using
|
|
# or distributing such scripts, even though portions of the text of the
|
|
# Macro appear in them. The GNU General Public License (GPL) does govern
|
|
# all other use of the material that constitutes the Autoconf Macro.
|
|
#
|
|
# This special exception to the GPL applies to versions of the Autoconf
|
|
# Macro released by the Autoconf Archive. When you make and distribute a
|
|
# modified version of the Autoconf Macro, you may extend this special
|
|
# exception to the GPL to apply to your modified version as well.
|
|
|
|
#serial 9
|
|
|
|
# mattst88:
|
|
# Modified YACC assignment to remove -o y.tab.c since we're writing
|
|
# our own .y/.yy rules.
|
|
#
|
|
# Replaced m4_ifnblank(...) with m4_ifval(m4_normalize(...), ...)
|
|
# since m4_ifnblank requires autoconf-2.64.
|
|
|
|
AC_DEFUN([AX_PROG_BISON], [
|
|
AC_REQUIRE([AC_PROG_YACC])
|
|
AC_REQUIRE([AC_PROG_EGREP])
|
|
|
|
AC_CACHE_CHECK([if bison is the parser generator],[ax_cv_prog_bison],[
|
|
AS_IF([$YACC --version 2>/dev/null | $EGREP -q '^bison '],
|
|
[ax_cv_prog_bison=yes], [ax_cv_prog_bison=no])
|
|
])
|
|
AS_IF([test "$ax_cv_prog_bison" = "yes"], [
|
|
dnl replace the yacc-compatible compiler with the real bison, as
|
|
dnl otherwise autoconf limits us to the POSIX yacc.
|
|
dnl We also change the generated filename to the old one, so that
|
|
dnl automake's ylwrap can deal with it.
|
|
YACC="${YACC% -y}"
|
|
] m4_ifval(m4_normalize([$1]), [[$1]]),
|
|
m4_ifval(m4_normalize([$2]), [[$2]])
|
|
)
|
|
])
|