From 71c2f69a63c03fb797345762f861d3a587c8c5a1 Mon Sep 17 00:00:00 2001
From: Siddharth Bharat Purohit <siddharthbharatpurohit@gmail.com>
Date: Tue, 21 Jun 2016 19:56:18 +0530
Subject: [PATCH] waf: add support for sitl build on mac

---
 Tools/ardupilotwaf/boards.py     | 12 +++++++++---
 Tools/ardupilotwaf/cxx_checks.py |  3 +++
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/Tools/ardupilotwaf/boards.py b/Tools/ardupilotwaf/boards.py
index 566d632a1f..f121def9ec 100644
--- a/Tools/ardupilotwaf/boards.py
+++ b/Tools/ardupilotwaf/boards.py
@@ -148,9 +148,15 @@ class Board:
                 '-O0',
             ]
 
-        env.LINKFLAGS += [
-            '-Wl,--gc-sections',
-        ]
+        if cfg.env.DEST_OS == 'darwin':
+            env.LINKFLAGS += [
+                '-Wl,-dead_strip',
+            ]
+        else:
+            env.LINKFLAGS += [
+                '-Wl,--gc-sections',
+            ]
+
 
     def build(self, bld):
         bld.ap_version_append_str('GIT_VERSION', bld.git_head_hash(short=True))
diff --git a/Tools/ardupilotwaf/cxx_checks.py b/Tools/ardupilotwaf/cxx_checks.py
index e342686e84..87b8403536 100644
--- a/Tools/ardupilotwaf/cxx_checks.py
+++ b/Tools/ardupilotwaf/cxx_checks.py
@@ -126,6 +126,9 @@ def ap_common_checks(cfg):
 
 @conf
 def check_librt(cfg, env):
+    if cfg.env.DEST_OS == 'darwin':
+        return True
+
     ret = cfg.check(
         compiler='cxx',
         fragment='''