POSIX requires environ to be declared before use.

Niall Douglas (s [underscore] sourceforge {at} nedprod [dot] com) · Niall Douglas (s [underscore] sourceforge {at} nedprod [dot] com) · commit a7b40b145a3d · 2014-05-29T16:56:47.000+01:00
diff --git a/src/maidsafe/tests/client_test.cc b/src/maidsafe/tests/client_test.cc
@@ -18,6 +18,10 @@
 
 #include "maidsafe/client.h"
 
+#ifdef __FreeBSD__
+extern "C" char **environ;
+#endif
+
 #include "boost/process/child.hpp"
 #include "boost/process/execute.hpp"
 #include "boost/process/initializers.hpp"
