casa-mp-base

--- common/sysutils.c.old   2017-08-28 12:22:54.000000000 +0200

+++ common/sysutils.c   2017-11-05 11:45:20.000000000 +0100

@@ -36,6 +36,11 @@

 # undef USE_NPTH

 #endif

+/* Needed for the int-returning version of unsetenv(). */

+#if defined(__APPLE__) && ((!defined(_POSIX_C_SOURCE)) || (_POSIX_C_SOURCE < 200112L))

+#define _POSIX_C_SOURCE 200112L

+#endif

+

 #include <stdio.h>

 #include <stdlib.h>

 #include <stdint.h>