python: Enable C compiler warnings.

python/Makefile.am

@@ -42,7 +42,7 @@ python_LTLIBRARIES = libguestfsmod.la
 libguestfsmod_la_SOURCES = guestfs-py.c guestfs-py.h guestfs-py-byhand.c
 libguestfsmod_la_CFLAGS = \
 	-DGUESTFS_PRIVATE_FUNCTIONS=1 \
-	-Wall \
+	$(WARN_CFLAGS) $(WERROR_CFLAGS) \
 	-I$(PYTHON_INCLUDEDIR) \
 	-I$(top_srcdir)/src -I$(top_builddir)/src
 libguestfsmod_la_LIBADD = $(top_builddir)/src/libguestfs.la

python/guestfs-py-byhand.c

@@ -21,6 +21,12 @@
  * guestfs-py.c).
  */
 
+/* This has to be included first, else definitions conflict with
+ * glibc header files.  Python is broken.
+ */
+#define PY_SSIZE_T_CLEAN 1
+#include <Python.h>
+
 #include <config.h>
 
 #include <stdio.h>

python/guestfs-py.h

@@ -21,9 +21,6 @@
 
 #include "guestfs.h"
 
-#define PY_SSIZE_T_CLEAN 1
-#include <Python.h>
-
 #if PY_VERSION_HEX < 0x02050000
 typedef int Py_ssize_t;
 #define PY_SSIZE_T_MAX INT_MAX