--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/components/desktop/thunderbird/patches/firefox21-50-nsMathUtils.patch	Mon Jan 11 09:27:45 2016 -0800
@@ -0,0 +1,14 @@
+This allows us to get some function from math.h that other platforms are
+getting from ieeefp.h.
+Easy to send upstream since it already has ifdef statement.
+
+--- comm-esr31/mozilla/xpcom/ds/nsMathUtils.h.orig	2015-06-04 17:42:51.616409449 -0700
++++ comm-esr31/mozilla/xpcom/ds/nsMathUtils.h	2015-06-04 17:42:51.621339786 -0700
+@@ -13,6 +13,7 @@
+ #include <float.h>
+ 
+ #ifdef SOLARIS
++#include <math.h>
+ #include <ieeefp.h>
+ #endif
+