From 153b480b267a2d62e3b2d671d8018ab6e55dc8c4 Mon Sep 17 00:00:00 2001
From: "Daniel M. Pelt" <D.M.Pelt@cwi.nl>
Date: Tue, 24 Feb 2015 14:19:34 +0100
Subject: Better Python configure checks

---
 build/linux/configure.ac | 31 ++++++++++++++++++++++++-------
 1 file changed, 24 insertions(+), 7 deletions(-)

diff --git a/build/linux/configure.ac b/build/linux/configure.ac
index f4cc82e..f9755f9 100644
--- a/build/linux/configure.ac
+++ b/build/linux/configure.ac
@@ -162,17 +162,34 @@ AC_SUBST(HAVEMATLAB)
 
 # python
 
-AC_ARG_WITH(python, [[  --with-python=path      path of Python (optional)]],,)
+AC_ARG_WITH(python, [[  --with-python=path      path of Python binary (optional)]],,)
 
-PY_PATH=$PATH
 HAVEPYTHON=no
 if test x"$with_python" != x; then
-  PY_PATH="$with_python:$PY_PATH"
-  AC_PATH_PROG([PYTHON], [python], [no], [$PY_PATH])
-  if test x"$PYTHON" != xno; then
-    HAVEPYTHON=yes
-    AC_SUBST(PYTHON)
+  AC_CHECK_FILE([$with_python],[PYTHON=$with_python],[AC_PATH_PROG([PYTHON], [$with_python], [AC_MSG_ERROR(Python binary not found)], [$PATH])])
+  HAVEPYTHON=yes
+  AC_SUBST(PYTHON)
+  AC_MSG_CHECKING(for numpy module)
+  echo "import numpy" | $PYTHON -
+  if test $? -ne 0 ; then
+    AC_MSG_RESULT(not found)
+    AC_MSG_ERROR(You need the numpy module to use the ASTRA toolbox in Python)
   fi
+  AC_MSG_RESULT(found)
+  AC_MSG_CHECKING(for Cython module)
+  echo "import Cython;from distutils.version import LooseVersion;assert(LooseVersion(Cython.__version__)>=LooseVersion('0.13'))" | $PYTHON -
+  if test $? -ne 0 ; then
+    AC_MSG_RESULT(not found)
+    AC_MSG_ERROR(You need the Cython module (version >=0.13) to use the ASTRA toolbox in Python)
+  fi
+  AC_MSG_RESULT(found)
+  AC_MSG_CHECKING(for six module)
+  echo "import six" | $PYTHON -
+  if test $? -ne 0 ; then
+    AC_MSG_RESULT(not found)
+    AC_MSG_ERROR(You need the six module to use the ASTRA toolbox in Python)
+  fi
+  AC_MSG_RESULT(found)
 fi
 
 AC_SUBST(HAVEPYTHON)
-- 
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