# 
# 
# patch "tester.cc"
#  from [7b05bc7981e0f2bf7e1e38e5e1348460696d0d27]
#    to [06975e6bff9b304623fc8c5b5e226f75900fd326]
# 
============================================================
--- tester.cc	7b05bc7981e0f2bf7e1e38e5e1348460696d0d27
+++ tester.cc	06975e6bff9b304623fc8c5b5e226f75900fd326
@@ -78,6 +78,10 @@ void setenv(char const * var, char const
 {
   _putenv_s(var, val);
 }
+void unsetenv(char const * var)
+{
+  _putenv_s(var, "");
+}
 #else
 void setenv(char const * var, char const * val)
 {
@@ -88,6 +92,15 @@ void setenv(char const * var, char const
   memcpy(cp, s, len);
   putenv(cp);
 }
+void unsetenv(char const * var)
+{
+  string tempstr = string(var) + "=";
+  char const *s = tempstr.c_str();
+  size_t len = tempstr.size() + 1;
+  char *cp = new char[len];
+  memcpy(cp, s, len);
+  putenv(cp);
+}
 #endif
 map<string, string> orig_env_vars;