switch the build system to waf

This commit adds a new build system based on waf. configure and Makefile
are deprecated effective immediately and someday in the future they will be
removed (they are still available by running ./old-configure).

You can find how the choice for waf came to be in `DOCS/waf-buildsystem.rst`.
TL;DR: we couldn't get the same level of abstraction and customization with
other build systems we tried (CMake and autotools).

For guidance on how to build the software now, take a look at README.md
and the cross compilation guide.

CREDITS:
This is a squash of ~250 commits. Some of them are not by me, so here is the
deserved attribution:

 - @wm4 contributed some Windows fixes, renamed configure to old-configure
   and contributed to the bootstrap script. Also, GNU/Linux testing.
 - @lachs0r contributed some Windows fixes and the bootstrap script.
 - @Nikoli contributed a lot of testing and discovered many bugs.
 - @CrimsonVoid contributed changes to the bootstrap script.

1 files changed, 46 insertions, 0 deletions

diff --git a/waftools/waf_customizations.py b/waftools/waf_customizations.py
new file mode 100644
index 0000000000..b6798d4235
--- /dev/null
+++ b/waftools/waf_customizations.py
@@ -0,0 +1,46 @@
+from waflib.Configure import conf
+
+@conf
+def get_config_header(self, defines=True, headers=False, define_prefix=''):
+    """
+    Only difference is it outputs `#define VAR 0` or `#define VAR value`
+    instead of `#undef VAR` or `#define VAR val`.
+    """
+    from waflib.Tools.c_config import DEFKEYS, INCKEYS
+    lst = []
+    if headers:
+        for x in self.env[INCKEYS]:
+            lst.append('#include <%s>' % x)
+
+    if defines:
+        for x in self.env[DEFKEYS]:
+            val = self.is_defined(x) and self.get_define(x) or "0"
+            lst.append('#define %s %s' % (define_prefix + x, val))
+
+    return "\n".join(lst)
+
+from waflib import TaskGen
+
+@TaskGen.extension('.m')
+def m_hook(self, node):
+    """
+    Makes waf call the c compiler for objective-c files
+    """
+    return self.create_compiled_task('c', node)
+
+def build(ctx):
+    from waflib import Task
+    cls = Task.classes['cprogram']
+    class cprogram(cls):
+        run_str = cls.hcode + '${LAST_LINKFLAGS}'
+
+    cls = Task.classes['macplist']
+    class macplist(cls):
+        def run(self):
+            from waflib import Utils
+            if getattr(self, 'code', None):
+                txt = self.code
+            else:
+                txt = self.inputs[0].read()
+            txt = Utils.subst_vars(txt, self.env)
+            self.outputs[0].write(txt)