--- src/3rdparty/javascriptcore/JavaScriptCore/wtf/MathExtras.h.orig	2017-06-08 07:29:22.000000000 -0700
+++ src/3rdparty/javascriptcore/JavaScriptCore/wtf/MathExtras.h	2017-09-30 13:12:02.000000000 -0700
@@ -73,7 +73,7 @@
 // Work around a bug in the Mac OS X libc where ceil(-0.1) return +0.
 inline double wtf_ceil(double x) { return copysign(ceil(x), x); }
 
-#define ceil(x) wtf_ceil(x)
+//#define ceil(x) wtf_ceil(x)
 
 #endif