build: fix cocoa configure check on OS X 10.7

It failed because the 10.7 SDK doesn't natively support array and dictionary
subscripting.

waftools/checks/custom.py

@@ -3,7 +3,8 @@ from waftools.checks.generic import *
 from waflib import Utils
 import os
 
-__all__ = ["check_pthreads", "check_iconv", "check_lua", "check_oss_4front"]
+__all__ = ["check_pthreads", "check_iconv", "check_lua", "check_oss_4front",
+           "check_cocoa"]
 
 pthreads_program = load_fragment('pthreads.c')
 
@@ -101,3 +102,13 @@ def check_oss_4front(ctx, dependency_identifier):
                   fragment=load_fragment('oss_audio.c'))
 
     return fn(ctx, dependency_identifier)
+
+def check_cocoa(ctx, dependency_identifier):
+    fn = check_cc(
+        fragment         = load_fragment('cocoa.m'),
+        compile_filename = 'test.m',
+        framework_name   = ['Cocoa', 'IOKit', 'OpenGL'],
+        includes         = ctx.srcnode.abspath(),
+        linkflags        = '-fobjc-arc')
+
+    return fn(ctx, dependency_identifier)

waftools/fragments/cocoa.m

@@ -2,6 +2,8 @@
 #import <OpenGL/OpenGL.h>
 #import <Cocoa/Cocoa.h>
 
+#include "osdep/macosx_compat.h"
+
 int main(int argc, char **argv) {
     @autoreleasepool {
         NSArray *ary = @[@1, @2, @3];

wscript

@@ -498,11 +498,7 @@ video_output_features = [
     {
         'name': '--cocoa',
         'desc': 'Cocoa',
-        'func': check_cc(
-            fragment=load_fragment('cocoa.m'),
-            compile_filename='test.m',
-            framework_name=['Cocoa', 'IOKit', 'OpenGL'],
-            linkflags='-fobjc-arc')
+        'func': check_cocoa
     } , {
         'name': 'gdi',
         'desc': 'GDI',