Fail to configure without an LLVM-friendly Python
step_msg "looking for build programs"
probe_need CFG_PERL perl
-probe_need CFG_PYTHON python python2.6 python2 python3
probe_need CFG_CURL curl
+probe_need CFG_PYTHON python2.7 python2.6 python2 python
+
+python_version=$($CFG_PYTHON -V 2>&1)
+if [ $(echo $python_version | grep -c '^Python 2\.[4567]') -ne 1 ]; then
+ err "Found $python_version, but LLVM requires Python 2.4-2.7"
+fi
# If we have no git directory then we are probably a tarball distribution
# and shouldn't attempt to load submodules