On z/OS import time.h in addition to sys/time.h (#2788) (#2790)

* On z/OS import time.h in addition to sys/time.h

# Description
* On z/OS `CLOCKS_PER_SEC` is in time.h and `timeval` is in sys/time.sh so we need both imported.



---------

Signed-off-by: Charles Volzka <cjvolzka@us.ibm.com>

Author: cjvolzka

src/Accelerators/NNPA/Runtime/zDNNExtension/Elementwise.c

@@ -12,14 +12,17 @@
 //
 //===----------------------------------------------------------------------===//
 
-// Include pthreads (need special treatment on z/OS).
+// z/OS specific includes
 #ifdef __MVS__
+// needed for pthread on z/OS
 #define _OPEN_THREADS
+// z/OS needs <time.h> in addition to <sys/time.h>
+#include <time.h>
 #endif
-#include <pthread.h>
 
 #include <assert.h>
 #include <math.h>
+#include <pthread.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/time.h>

src/Accelerators/NNPA/Runtime/zDNNExtension/MatMul.c

@@ -12,16 +12,19 @@
 //
 //===----------------------------------------------------------------------===//
 
-// Include pthreads (need special treatment on z/OS).
+// z/OS specific includes
 #ifdef __MVS__
+// special treatment for pthreads on z/OS.
 #define _OPEN_THREADS
 #define _OPEN_SYS_EXT
 #include <sys/ps.h>
+// z/OS needs <time.h> in addition to <sys/time.h>
+#include <time.h>
 #endif
-#include <pthread.h>
 
 #include <assert.h>
 #include <math.h>
+#include <pthread.h>
 #include <sched.h>
 #include <stdio.h>
 #include <stdlib.h>

src/Accelerators/NNPA/Runtime/zDNNExtension/Softmax.c

@@ -12,14 +12,17 @@
 //
 //===----------------------------------------------------------------------===//
 
-// Include pthreads (need special treatment on z/OS).
+// z/OS specific includes
 #ifdef __MVS__
+// needed for pthread on z/OS
 #define _OPEN_THREADS
+// z/OS needs <time.h> in addition to <sys/time.h>
+#include <time.h>
 #endif
-#include <pthread.h>
 
 #include <assert.h>
 #include <math.h>
+#include <pthread.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/time.h>

src/Accelerators/NNPA/Runtime/zDNNExtension/zDNNExtension.h

@@ -15,6 +15,12 @@
 #ifndef ONNX_MLIR_ZDNNEXTENSION_H
 #define ONNX_MLIR_ZDNNEXTENSION_H
 
+// z/OS specific includes
+#ifdef __MVS__
+// z/OS needs <time.h> in addition to <sys/time.h>
+#include <time.h>
+#endif
+
 #include <stdlib.h>
 #include <sys/time.h>