fix python version check (#705)
Commit 11a337f1 added major and minor python version
checking to cast.h but does not use the macros defined
via the Python.h inclusion. This may be due to an
intention to use the variables defined by the cmake
module FindPythonInterpreter, but nothing in the
pybind11 repo does anything to convert the cmake
variables to preprocessor defines.
diff --git a/include/pybind11/cast.h b/include/pybind11/cast.h
index b7128d1..3096600 100644
--- a/include/pybind11/cast.h
+++ b/include/pybind11/cast.h
@@ -646,14 +646,14 @@
using StringType = std::basic_string<CharT, Traits, Allocator>;
bool load(handle src, bool) {
-#if PY_VERSION_MAJOR < 3
+#if PY_MAJOR_VERSION < 3
object temp;
#endif
handle load_src = src;
if (!src) {
return false;
} else if (!PyUnicode_Check(load_src.ptr())) {
-#if PY_VERSION_MAJOR >= 3
+#if PY_MAJOR_VERSION >= 3
return false;
// The below is a guaranteed failure in Python 3 when PyUnicode_Check returns false
#else