add missing includes for C library functions

We use various C library functions like printf, strcmp, free
but don't have the corresponding #includes, getting them
indirectly via Python.h. This is a bad idea as Python.h is
not guaranteed to provided these, and indeed will omit them
when Py_LIMITED_API is greater then 0x030a0000.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

generator.py

@@ -881,6 +881,7 @@ def emit_c_code(module: str) -> None:
 
     wrapper = open(wrapper_file, "w")
     wrapper.write("/* Generated by generator.py */\n\n")
+    wrapper.write("#include <stdlib.h>\n")
     wrapper.write("#include <Python.h>\n")
     wrapper.write("#include <libvirt/%s.h>\n" % (module,))
     wrapper.write("#include \"typewrappers.h\"\n")

libvirt-override.c

@@ -18,6 +18,9 @@
 #define VIR_ENUM_SENTINELS
 
 #define PY_SSIZE_T_CLEAN
+
+#include <stdio.h>
+#include <string.h>
 #include <Python.h>
 #include <libvirt/libvirt.h>
 #include <libvirt/virterror.h>

libvirt-qemu-override.c

@@ -14,6 +14,7 @@
    which has over 180 autoconf-style HAVE_* definitions.  Shame on them.  */
 #undef HAVE_PTHREAD_H
 
+#include <stdio.h>
 #include <Python.h>
 #include <libvirt/libvirt-qemu.h>
 #include <libvirt/virterror.h>

libvirt-utils.c

@@ -19,6 +19,8 @@
  *
  */
 
+#include <string.h>
+
 #include <Python.h>
 
 /* Ugly python defines that, which is also defined in errno.h */

typewrappers.c

@@ -12,6 +12,8 @@
  * which has over 180 autoconf-style HAVE_* definitions.  Shame on them.  */
 #undef HAVE_PTHREAD_H
 
+#include <stdio.h>
+#include <string.h>
 #include "typewrappers.h"
 #include "libvirt-utils.h"