added DefinesOptions.h to Mac build. part of fix for #39959

config/mac/DefinesMozilla.h

@@ -23,6 +23,8 @@
 #ifndef DefinesMozilla_h_
 #define DefinesMozilla_h_
 
+#include "DefinesOptions.h"		// written at build time
+
 // *** Security
 //#define NADA_VERSION
 //#define EXPORT_VERSION

config/mac/MANIFEST

@@ -4,6 +4,7 @@
 
 DefinesMac.h
 DefinesMozilla.h
+DefinesOptions.h
 
 JavaDefines.h