From 50258bd7d0854b91aeff21fd51b49afb902be5fe Mon Sep 17 00:00:00 2001 From: Jonathan Rajotte Date: Fri, 10 Jul 2015 17:03:18 -0400 Subject: [PATCH] Build: add Flex version check MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Signed-off-by: Jonathan Rajotte Signed-off-by: Jérémie Galarneau --- config/ax_prog_flex_version.m4 | 69 ++++++++++++++++++++++++++++++++++ configure.ac | 4 ++ 2 files changed, 73 insertions(+) create mode 100644 config/ax_prog_flex_version.m4 diff --git a/config/ax_prog_flex_version.m4 b/config/ax_prog_flex_version.m4 new file mode 100644 index 000000000..da60e00f5 --- /dev/null +++ b/config/ax_prog_flex_version.m4 @@ -0,0 +1,69 @@ +# =========================================================================== +# http://www.gnu.org/software/autoconf-archive/ax_prog_flex_version.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_PROG_FLEX_VERSION([VERSION],[ACTION-IF-TRUE],[ACTION-IF-FALSE]) +# +# DESCRIPTION +# +# Makes sure that flex 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 $FLEX is not +# set (for example by running AC_CHECK_PROG or AC_PATH_PROG) the macro +# will fail. +# +# Example: +# +# AC_PATH_PROG([FLEX],[flex]) +# AX_PROG_FLEX_VERSION([2.5.39],[ ... ],[ ... ]) +# +# This will check to make sure that the flex you have is at least version +# 2.5.39 or greater. +# +# NOTE: This macro uses the $FLEX variable to perform the check. +# +# LICENSE +# +# Copyright (c) 2015 Jonathan Rajotte-Julien +# +# Copying and distribution of this file, with or without modification, are +# permitted in any medium without royalty provided the copyright notice +# and this notice are preserved. This file is offered as-is, without any +# warranty. + +#serial 1 + +AC_DEFUN([AX_PROG_FLEX_VERSION],[ + AC_REQUIRE([AC_PROG_SED]) + AC_REQUIRE([AC_PROG_GREP]) + + AS_IF([test -n "$FLEX"],[ + ax_flex_version="$1" + + AC_MSG_CHECKING([for flex version]) + changequote(<<,>>) + flex_version=`$FLEX --version 2>&1 \ + | $SED -n -e '/flex /b inspect +b +: inspect +s/.* (\{0,1\}\([0-9]*\.[0-9]*\.[0-9]*\))\{0,1\}.*/\1/;p'` + changequote([,]) + AC_MSG_RESULT($flex_version) + + AC_SUBST([FLEX_VERSION],[$flex_version]) + + AX_COMPARE_VERSION([$flex_version],[ge],[$ax_flex_version],[ + : + $2 + ],[ + : + $3 + ]) + ],[ + AC_MSG_WARN([could not find flex]) + $3 + ]) +]) diff --git a/configure.ac b/configure.ac index e68673974..3fa993dc5 100644 --- a/configure.ac +++ b/configure.ac @@ -426,6 +426,10 @@ if test ! -f "$srcdir/src/lib/lttng-ctl/filter/filter-lexer.c"; then AC_MSG_ERROR([[flex not found and is required when building from git. Please install flex]]) fi + AC_PATH_PROG([FLEX],[flex]) + AX_PROG_FLEX_VERSION([2.5.35], [],[ + AC_MSG_ERROR([[Flex >= 2.5.35 is required when building from git]]) + ]) fi CFLAGS="-Wall $CFLAGS -g -fno-strict-aliasing" -- 2.34.1