Revamp the build system.

Quick summary of changes:

  - Move list of cairo source files out of src/Makefile.am and into
    src/Sources.mk,

  - Generate files src/Config.mk and src/Config.mk.win32 that choose
    the right set of source files and headers based on configured
    backends and features.  This drastically simplifies building
    using other build systems.  The src/Makefile.win32 file needs
    to be updated to reflect these changes.

  - Add README files to various directories,

  - Add toplevel HACKING file.

1 files changed, 6 insertions, 1 deletions

diff --git a/src/cairo-xlib-xrender-private.h b/src/cairo-xlib-xrender-private.h
index a61a67e52..329262c77 100644
--- a/src/cairo-xlib-xrender-private.h
+++ b/src/cairo-xlib-xrender-private.h
@@ -33,6 +33,11 @@
 #ifndef CAIRO_XLIB_XRENDER_PRIVATE_H
 #define CAIRO_XLIB_XRENDER_PRIVATE_H
 
+#include "cairo-features.h"
+#include "cairo-compiler-private.h"
+
+#include <X11/Xlib.h>
+
 #if CAIRO_HAS_XLIB_XRENDER_SURFACE
 
 #include "cairo-xlib-xrender.h"
@@ -52,7 +57,7 @@
  * take a pointer as first argument */
 
 __attribute__((__unused__)) static void   _void_consume        (void *p, ...)   { }
-__attribute__((__unused__)) static void * _voidp_consume       (void *p, ...)   { return NULL; }
+__attribute__((__unused__)) static void * _voidp_consume       (void *p, ...)   { return (void *)0; }
 __attribute__((__unused__)) static int    _int_consume         (void *p, ...)   { return 0; }
 __attribute__((__unused__)) static void   _void_consume_free   (Display *p, XID n) { }