+#if _POSIX_C_SOURCE < 200112L
+# define MISSING_UNSETENV_3
+#endif
+
+#if _POSIX_C_SOURCE < 200809L
+# define MISSING_POSIX_MEMALIGN
+#endif
+
+
+/* SunOS5 doesn't accept getcwd(NULL, 0) to auto-allocate
+a buffer */
+
+#define OS_GETCWD
+
+
+#ifndef MIN
+# define MIN(a,b) (((a)<(b))?(a):(b))
+# define MAX(a,b) (((a)>(b))?(a):(b))
+#endif
+