add std::chrono test, if available use in thread test

cmake/SC_Config_Headers.cmake

@@ -64,6 +64,23 @@ cmake_push_check_state()
   CHECK_CXX_SOURCE_RUNS( "${TEST_STD_THREAD}" HAVE_STD_THREAD )   #quotes are *required*!
 cmake_pop_check_state()
 
+set( TEST_STD_CHRONO "
+#include <iostream>
+#include <chrono>
+int main() {
+    std::chrono::seconds sec(1);
+    std::cout << \"1s is \"<< std::chrono::duration_cast<std::chrono::milliseconds>(sec).count() << \" ms\" << std::endl;
+}
+" )
+cmake_push_check_state()
+  if( UNIX )
+    set( CMAKE_REQUIRED_FLAGS "-std=c++0x" )
+  else( UNIX )
+    # vars probably need set for embarcadero, etc
+  endif( UNIX )
+  CHECK_CXX_SOURCE_RUNS( "${TEST_STD_CHRONO}" HAVE_STD_CHRONO )   #quotes are *required*!
+cmake_pop_check_state()
+
 # Now that all the tests are done, configure the sc_cf.h file:
 get_property(CONFIG_H_FILE_CONTENTS GLOBAL PROPERTY SC_CONFIG_H_CONTENTS)
 file(WRITE ${CONFIG_H_FILE} "${CONFIG_H_FILE_CONTENTS}")

include/sc_cf_cmake.h.in

@@ -24,5 +24,6 @@
 #cmakedefine HAVE_SSIZE_T 1
 
 #cmakedefine HAVE_STD_THREAD 1
+#cmakedefine HAVE_STD_CHRONO 1
 
 #endif /* SCL_CF_H */

test/cpp/schema_specific/stepfile_rw_progress.cc

@@ -15,6 +15,10 @@
 # error Need std::thread for this test!
 #endif
 
+#ifdef HAVE_STD_CHRONO
+# include <chrono>
+#endif
+
 #ifdef HAVE_UNISTD_H
 # include <unistd.h>
 #endif
@@ -22,13 +26,17 @@
 #include "SdaiAUTOMOTIVE_DESIGN.h"
 
 //macro for 50 ms sleep (could be more for a larger file, may need reduced for a fast processor)
-#ifndef __WIN32__
-# define DELAY(t) usleep( t * 100 );
+#ifdef HAVE_STD_CHRONO
+# define DELAY(t) std::this_thread::sleep_for(std::chrono::milliseconds(50));
 #else
-#define DELAY(t) Sleep( t );
+# ifndef __WIN32__
+#  define DELAY(t) usleep( t * 100 )
+# else
+#  include <WinBase.h>
+#  define DELAY(t) Sleep( t )
+# endif
 #endif
 
-
 // NOTE this test requires std::thread, part of C++11. It will fail to compile otherwise.
 
 void readProgressParallel( STEPfile & f, float & maxProgress ) {