waf: added --enable-ppp option

Tools/ardupilotwaf/boards.py

@@ -148,6 +148,9 @@ class Board:
             )
             cfg.msg("Enabled custom controller", 'no', color='YELLOW')
 
+        if cfg.options.enable_ppp:
+            env.CXXFLAGS += ['-DAP_NETWORKING_BACKEND_PPP=1']
+
         if cfg.options.disable_networking:
             env.CXXFLAGS += ['-DAP_NETWORKING_ENABLED=0']
 

wscript

@@ -180,6 +180,11 @@ def options(opt):
         action='store_true',
         default=False,
         help='enable OS level thread statistics.')
+
+    g.add_option('--enable-ppp',
+        action='store_true',
+        default=False,
+        help='enable PPP networking.')
     
     g.add_option('--bootloader',
         action='store_true',