Drand48 does not exist on win32

diff --git a/src/instr/instr_private.h b/src/instr/instr_private.h
index ac2949dc05124cb07011c883cb74073041c5e9fb..4f57282d5b4ef08b8fbdb6ff4148d5be67f32051 100644 (file)
--- a/src/instr/instr_private.h
+++ b/src/instr/instr_private.h
@@ -11,6 +11,11 @@
 
 #ifdef HAVE_TRACING
 
+/* Need to define function drand48 for Windows */
+#ifdef _WIN32
+       #define drand48() rand()/(float)(RAND_MAX);
+#endif
+
 #define INSTR_DEFAULT_STR_SIZE 500
 
 #include "instr/instr.h"