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Diffstat (limited to 'm4/ax_prog_bison_version.m4')
| -rw-r--r-- | m4/ax_prog_bison_version.m4 | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/m4/ax_prog_bison_version.m4 b/m4/ax_prog_bison_version.m4 new file mode 100644 index 00000000..91652fe9 --- /dev/null +++ b/m4/ax_prog_bison_version.m4 @@ -0,0 +1,68 @@ +# =========================================================================== +# Modified from +# http://www.gnu.org/software/autoconf-archive/ax_prog_perl_version.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_PROG_BISON_VERSION([VERSION],[ACTION-IF-TRUE],[ACTION-IF-FALSE]) +# +# DESCRIPTION +# +# Makes sure that bison supports the version indicated. If true the shell +# commands in ACTION-IF-TRUE are executed. If not the shell commands in +# ACTION-IF-FALSE are run. Note if $PERL is not set the macro will fail. +# +# Example: +# +# AC_PROG_YACC +# AX_PROG_BISON_VERSION([3.0.0],[ ... ],[ ... ]) +# +# This will check to make sure that the bison you have supports at least +# version 3.0.0. +# +# NOTE: This macro uses the $YACC variable to perform the check. +# AX_WITH_YACC can be used to set that variable prior to running this +# macro. The $BISON_VERSION variable will be set with the detected +# version. +# +# LICENSE +# +# Copyright (c) 2009 Francesco Salvestrini <salvestrini@users.sourceforge.net> +# +# Copying and distribution of this file, with or without modification, are +# permitted in any medium without royalty provided the copyright notice +# and this notice are preserved. This file is offered as-is, without any +# warranty. + +#serial 12 + +AC_DEFUN([AX_PROG_BISON_VERSION],[ + AC_REQUIRE([AC_PROG_SED]) + AC_REQUIRE([AC_PROG_GREP]) + + AS_IF([test -n "$YACC"],[ + ax_bison_version="$1" + + AC_MSG_CHECKING([for bison version]) + changequote(<<,>>) + bison_version=`$YACC --version 2>&1 \ + | $GREP bison \ + | $SED -rn -e 's/bison .* ([0-9]+([.][0-9])+)+/\1/p'` + changequote([,]) + AC_MSG_RESULT($bison_version) + + AC_SUBST([BISON_VERSION],[$bison_version]) + + AX_COMPARE_VERSION([$ax_bison_version],[le],[$bison_version],[ + : + $2 + ],[ + : + $3 + ]) + ],[ + AC_MSG_WARN([could not find bison]) + $3 + ]) +]) |