[Rivet-svn] rivet: require hepmc >= 2.06.09

[Rivet Mercurial]

details:   https://rivet.hepforge.org/hg/rivet/rev/334bc7a119fa
branches:  multiweight
changeset: 6118:334bc7a119fa
user:      Chris Pollard <cspollard at gmail.com>
date:      Fri Oct 27 15:13:12 2017 +0200
description:
require hepmc >= 2.06.09

diffs (truncated from 200 to 50 lines):

--- a/configure.ac	Fri Oct 27 14:38:28 2017 +0200
+++ b/configure.ac	Fri Oct 27 15:13:12 2017 +0200
@@ -95,12 +95,15 @@
 fi
 if test -f conftest.cc; then
   $CXX $CPPFLAGS conftest.cc -o conftest 2>&1 1>&5
-elif test -f conftest.C; then
-  $CXX $CPPFLAGS conftest.C -o conftest 2>&1 1>&5
 else
   $CXX $CPPFLAGS conftest.cpp -o conftest 2>&1 1>&5
 fi
 hepmc_version=`./conftest`
+AC_MSG_CHECKING([HepMC version])
+AX_COMPARE_VERSION([$hepmc_version], [lt], [2.06.09],
+                   AC_MSG_RESULT([no])
+                   AC_MSG_ERROR([Need HepMC 2.06.09 or later]),
+                   AC_MSG_RESULT([ok]))
 if test x$hepmc_version != x; then
   let hepmc_major=`echo "$hepmc_version" | cut -d. -f1`
   let hepmc_minor=`echo "$hepmc_version" | cut -d. -f2`
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/m4/ax_compare_version.m4	Fri Oct 27 15:13:12 2017 +0200
@@ -0,0 +1,177 @@
+# ===========================================================================
+#    https://www.gnu.org/software/autoconf-archive/ax_compare_version.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_COMPARE_VERSION(VERSION_A, OP, VERSION_B, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
+#
+# DESCRIPTION
+#
+#   This macro compares two version strings. Due to the various number of
+#   minor-version numbers that can exist, and the fact that string
+#   comparisons are not compatible with numeric comparisons, this is not
+#   necessarily trivial to do in a autoconf script. This macro makes doing
+#   these comparisons easy.
+#
+#   The six basic comparisons are available, as well as checking equality
+#   limited to a certain number of minor-version levels.
+#
+#   The operator OP determines what type of comparison to do, and can be one
+#   of:
+#
+#    eq  - equal (test A == B)
+#    ne  - not equal (test A != B)
+#    le  - less than or equal (test A <= B)
+#    ge  - greater than or equal (test A >= B)
+#    lt  - less than (test A < B)