Index: src/libcfa/gmp
===================================================================
--- src/libcfa/gmp	(revision 6c6455fa3aff35b9e4792ff0598a10b9ba27d3ea)
+++ src/libcfa/gmp	(revision 9ff83109de15ee85befb018efad63d43144de47b)
@@ -10,11 +10,13 @@
 // Created On       : Tue Apr 19 08:43:43 2016
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Sun May 14 23:47:36 2017
-// Update Count     : 9
-// 
-
+// Last Modified On : Sat May 13 22:52:26 2017
+// Update Count     : 8
+// 
+
+extern "C" {
 // https://gmplib.org/gmp-man-6.1.1.pdf
-
 #include <gmp.h>										// GNU multi-precise integers
+// some code for operators "/" and "%" taken from g++ gmpxx.h
+}
 #include <fstream>										// sout
 
@@ -144,5 +146,4 @@
 Int ?*=?( Int * lhs, unsigned long int rhs ) { return *lhs = *lhs * rhs; }
 
-// some code for operators "/" and "%" taken from g++ gmpxx.h
 Int ?/?( Int dividend, Int divisor ) { Int quotient; mpz_tdiv_q( quotient.mpz, dividend.mpz, divisor.mpz ); return quotient; }
 Int ?/?( Int dividend, unsigned long int divisor ) { Int quotient; mpz_tdiv_q_ui( quotient.mpz, dividend.mpz, divisor ); return quotient; }