Build: m4 macro for Bison version check

[babeltrace.git] / m4 / ax_prog_bison_version.m4

diff --git a/m4/ax_prog_bison_version.m4 b/m4/ax_prog_bison_version.m4
new file mode 100644 (file)
index 0000000..6b95585
--- /dev/null
+++ b/m4/ax_prog_bison_version.m4
@@ -0,0 +1,64 @@
+# 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.
+#
+#   Example:
+#
+#     AC_PATH_PROG([BISON],[bison])
+#     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 $BISON variable to perform the check.
+#
+# LICENSE
+#
+#   Copyright (c) 2015 Jonathan Rajotte-Julien <jonathan.rajotte-julien@efficios.com>
+#
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved. This file is offered as-is, without any
+#   warranty.
+
+#serial 12
+
+AC_DEFUN([AX_PROG_BISON_VERSION],[
+    AC_REQUIRE([AC_PROG_SED])
+    AC_REQUIRE([AC_PROG_GREP])
+
+    AS_IF([test -n "$BISON"],[
+        ax_bison_version="$1"
+
+        AC_MSG_CHECKING([for bison version])
+        changequote(<<,>>)
+        bison_version=`$BISON --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
+    ])
+])