Consolidation with CDI-PIO (develop)

Generally, this is !11 (merged) rebased onto the develop branch.

This is the first develop-based version accepted by the Buildbot of ICON: https://buildbot.dkrz.de/grid?branch=m300488/cdi-pio-2-integration

src/pio_posixasynch.c

@@ -62,14 +62,14 @@ initBFiledataPA(char *filename, size_t bufSize, int nc)
 
   dbuffer_init(&(bfd->fb), (size_t) nPrefStreams * bufSize);
 
-  bfd->ctrlBlks = Calloc((size_t) nPrefStreams, sizeof(bfd->ctrlBlks[0]));
+  struct aiocb *ctrlBlks = bfd->ctrlBlks = Calloc((size_t) nPrefStreams, sizeof(*ctrlBlks));
 
   for (int i = 0; i < nPrefStreams; i++)
     {
-      bfd->ctrlBlks[i].aio_fildes = bfd->handle;
-      bfd->ctrlBlks[i].aio_buf = bfd->fb->buffer + (size_t) i * bufSize;
-      bfd->ctrlBlks[i].aio_reqprio = 0;
-      bfd->ctrlBlks[i].aio_sigevent.sigev_notify = SIGEV_NONE;
+      ctrlBlks[i].aio_fildes = bfd->handle;
+      ctrlBlks[i].aio_buf = bfd->fb->buffer + (size_t) i * bufSize;
+      ctrlBlks[i].aio_reqprio = 0;
+      ctrlBlks[i].aio_sigevent.sigev_notify = SIGEV_NONE;
     }
 
   bfd->currOpIndex = nPrefStreams - 1;