Index: libcfa/src/stdhdr/math.h
===================================================================
--- libcfa/src/stdhdr/math.h	(revision fcd014321076dc247ecb706b7cb36599e8df00f4)
+++ libcfa/src/stdhdr/math.h	(revision f621e43f67eb9e1510c936e0e22bfd570171c1ff)
@@ -10,12 +10,20 @@
 // Created On       : Mon Jul  4 23:25:26 2016
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Mon Mar 15 14:02:03 2021
-// Update Count     : 17
+// Last Modified On : Fri Feb  7 19:05:27 2020
+// Update Count     : 15
 // 
 
 extern "C" {
+#if ! defined( exception )								// nesting ?
+#define exception ``exception							// make keyword an identifier
+#define __CFA_MATH_H__
+#endif
 
 #include_next <math.h>									// has internal check for multiple expansion
 
+#if defined( exception ) && defined( __CFA_MATH_H__ )	// reset only if set
+#undef exception
+#undef __CFA_MATH_H__
+#endif
 } // extern "C"