[yoda-svn] yoda: Quit during configure if no suitable cython is found.

[YODA Mercurial]

details:   https://yoda.hepforge.org/hg/yoda/rev/df60484216d5
branches:  release-1-6
changeset: 1296:df60484216d5
user:      David Grellscheid <david.grellscheid at durham.ac.uk>
date:      Tue Sep 20 13:13:29 2016 +0100
description:
Quit during configure if no suitable cython is found.

diffs (30 lines):

--- a/configure.ac	Tue Sep 20 09:24:43 2016 +0100
+++ b/configure.ac	Tue Sep 20 13:13:29 2016 +0100
@@ -130,8 +130,26 @@
 if test x$enable_pyext == xyes; then
   AM_CHECK_CYTHON([0.20], [:], [:])
   if test x$CYTHON_FOUND = xyes; then
-    AC_MSG_NOTICE([Cython >= 0.20 found: Python extension source can be rebuilt (for developers)])
+    AS_VERSION_COMPARE([$CYTHON_VERSION], [0.24], 
+          [AC_MSG_NOTICE([Cython >= 0.20 found: Python extension source can be rebuilt (for developers)])],
+          [AC_MSG_NOTICE([
+**************************************************
+Cython 0.24.x does not work for non-tarball builds
+  (https://github.com/cython/cython/issues/1465) 
+**************************************************]); CYTHON_FOUND="no"],
+          [AC_MSG_NOTICE([
+**************************************************
+Cython 0.24.x does not work for non-tarball builds
+  (https://github.com/cython/cython/issues/1465) 
+**************************************************]); CYTHON_FOUND="no"])
   fi
+
+  AC_CHECK_FILE([pyext/yoda/core.cpp],
+                [],
+                [if test "x$CYTHON_FOUND" != "xyes"; then
+                  AC_MSG_ERROR([Cython is required for --enable-pyext.])
+                fi])
+
   ## Set extra Python extension build flags (to cope with Cython output code oddities)
   PYEXT_CXXFLAGS=$CXXFLAGS
   AC_CEDAR_CHECKCXXFLAG([-Wno-unused-but-set-variable], [PYEXT_CXXFLAGS="$PYEXT_CXXFLAGS -Wno-unused-but-set-variable"])