--- a/targets/toolchain_makefile.py	Tue Oct 09 11:43:39 2018 +0300
+++ b/targets/toolchain_makefile.py	Tue Oct 09 11:56:45 2018 +0300
@@ -32,7 +32,7 @@
 from util.ProcessLogger import ProcessLogger
 
 
-includes_re = re.compile('\s*#include\s*["<]([^">]*)[">].*')
+includes_re = re.compile(r'\s*#include\s*["<]([^">]*)[">].*')
 
 
 class toolchain_makefile(object):