[Rivet-svn] rivet: add early bailout if no cython and core.cpp is missing

[Rivet Mercurial]

details:   https://rivet.hepforge.org/hg/rivet/rev/e4c5f2553122
branches:  release-2-5-x
changeset: 5528:e4c5f2553122
user:      David Grellscheid <david.grellscheid at durham.ac.uk>
date:      Tue Sep 27 18:17:57 2016 +0100
description:
add early bailout if no cython and core.cpp is missing

diffs (16 lines):

--- a/configure.ac	Tue Sep 27 17:54:45 2016 +0100
+++ b/configure.ac	Tue Sep 27 18:17:57 2016 +0100
@@ -292,6 +292,13 @@
   pip install --user cython==0.23.5
 **************************************************]); CYTHON_FOUND="no"])
   fi
+
+  AC_CHECK_FILE([pyext/rivet/core.cpp],
+                [],
+                [if test "x$CYTHON_FOUND" != "xyes"; then
+                  AC_MSG_ERROR([Cython is required for --enable-pyext.])
+                fi])
+
   cython_compiler=$CXX
   ## Set extra Python extension build flags (to cope with Cython output code oddities)
   PYEXT_CXXFLAGS="$CXXFLAGS"