ENH: added used sources with a path that has spaces

Tests/SubDirSpaces/Executable Sources/CMakeLists.txt

@@ -0,0 +1 @@
+ADD_EXECUTABLE(test test.cxx)

Tests/SubDirSpaces/Executable Sources/test.cxx

@@ -0,0 +1,49 @@
+#include <stdio.h>
+#include  <stdlib.h>
+#ifdef _WIN32
+#include <io.h>
+#else
+#include <unistd.h>
+#endif
+
+// return true if the file exists
+int FileExists(const char* filename)
+{
+#ifdef _MSC_VER
+# define access _access
+#endif
+#ifndef F_OK
+#define F_OK 0
+#endif
+  if ( access(filename, F_OK) != 0 )
+    {
+    return false;
+    }
+  else
+    {
+    return true;
+    }
+}
+
+
+int main(int ac, char** av)
+{
+  if(ac <= 1)
+    {
+    printf("Usage: %s <file>\n", av[0]);
+    return 1;
+    }
+  if(!FileExists(av[1]))
+    {
+    printf("Missing file %s\n", av[1]);
+    return 1;
+    }
+  if(FileExists(av[2]))
+    {
+    printf("File %s should be in subdirectory\n", av[2]);
+    return 1;
+    }
+  printf("%s is not there! Good.", av[2]);
+  printf("%s is there! Good.", av[1]);
+  return 0;
+}