From 13d9c8566cb938cec12fab3cf731409366dbf8f7 Mon Sep 17 00:00:00 2001
From: Thomas Nagy <tnagy@waf.io>
Date: Wed, 18 Dec 2019 07:27:03 +0100
Subject: [PATCH] Reduce relative path lengths to work around Visual Studio
 limitations #2272

---
 waflib/Tools/ccroot.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/waflib/Tools/ccroot.py b/waflib/Tools/ccroot.py
index 579d5b2b..f4e1c841 100644
--- a/waflib/Tools/ccroot.py
+++ b/waflib/Tools/ccroot.py
@@ -121,7 +121,11 @@ def apply_incpaths(self):
 	lst = self.to_incnodes(self.to_list(getattr(self, 'includes', [])) + self.env.INCLUDES)
 	self.includes_nodes = lst
 	cwd = self.get_cwd()
-	self.env.INCPATHS = [x.path_from(cwd) for x in lst]
+	if Utils.is_win32:
+		# Visual Studio limitations
+		self.env.INCPATHS = [x.path_from(cwd) if x.is_child_of(self.bld.srcnode) else x.abspath() for x in lst]
+	else:
+		self.env.INCPATHS = [x.path_from(cwd) for x in lst]
 
 class link_task(Task.Task):
 	"""