Fix build with Python 3.7

berolinux · stefanseefeld · commit 660487c43fde · 2018-02-09T15:09:27.000-05:00
Python 3.7 changes the return type of _PyUnicode_AsString()
from void* to const char* -- causing the build of boost-python
to fail.

Signed-off-by: Bernhard Rosenkränzer &lt;bero@lindev.ch&gt;
diff --git a/src/converter/builtin_converters.cpp b/src/converter/builtin_converters.cpp
@@ -45,11 +45,16 @@ namespace
   {
       return PyString_Check(obj) ? PyString_AsString(obj) : 0;
   }
-#else
+#elif PY_VERSION_HEX < 0x03070000
   void* convert_to_cstring(PyObject* obj)
   {
       return PyUnicode_Check(obj) ? _PyUnicode_AsString(obj) : 0;
   }
+#else
+  void* convert_to_cstring(PyObject* obj)
+  {
+      return PyUnicode_Check(obj) ? const_cast<void*>(reinterpret_cast<const void*>(_PyUnicode_AsString(obj))) : 0;
+  }
 #endif
 
   // Given a target type and a SlotPolicy describing how to perform a

Original file line number	Diff line number	Diff line change
`@@ -45,11 +45,16 @@ namespace`
`45`	`45`	`{`
`46`	`46`	`return PyString_Check(obj) ? PyString_AsString(obj) : 0;`
`47`	`47`	`}`
`48`		`-#else`
	`48`	`+#elif PY_VERSION_HEX < 0x03070000`
`49`	`49`	`void* convert_to_cstring(PyObject* obj)`
`50`	`50`	`{`
`51`	`51`	`return PyUnicode_Check(obj) ? _PyUnicode_AsString(obj) : 0;`
`52`	`52`	`}`
	`53`	`+#else`
	`54`	`+ void* convert_to_cstring(PyObject* obj)`
	`55`	`+ {`
	`56`	`+ return PyUnicode_Check(obj) ? const_cast<void>(reinterpret_cast<const void>(_PyUnicode_AsString(obj))) : 0;`
	`57`	`+ }`
`53`	`58`	`#endif`
`54`	`59`
`55`	`60`	`// Given a target type and a SlotPolicy describing how to perform a`