+
+
+/* Environment related definitions */
+# ifdef __APPLE__
+/* under darwin, the environment gets added to the process at startup time. So, it's not defined at library link time, forcing us to extra tricks */
+# include <crt_externs.h>
+# define environ (*_NSGetEnviron())
+# else
+/* the environment, as specified by the opengroup, used to initialize the process properties */
+extern char **environ;
+# endif
+
+xbt_dict_t env; /* the environment, stored as a dict (for variable substitution) */
+