/* Check that the types are all defined. */
struct timespec t1;
+#if 0
+/* POSIX:2008 does not require pid_t in <time.h> unconditionally, and indeed
+ it's missing on MacOS X 10.5, FreeBSD 6.4, OpenBSD 4.9, mingw. */
pid_t t2;
+#endif
/* Check that NULL can be passed through varargs as a pointer type,
per POSIX 2008. */