Add 3.15.6 example app (for compilation tests)

exampleApp/src/dbSubExample.c

@@ -0,0 +1,49 @@
+#include <stdio.h>
+
+#include <dbDefs.h>
+#include <registryFunction.h>
+#include <subRecord.h>
+#include <aSubRecord.h>
+#include <epicsExport.h>
+
+int mySubDebug;
+
+static long mySubInit(subRecord *precord)
+{
+    if (mySubDebug)
+        printf("Record %s called mySubInit(%p)\n",
+               precord->name, (void*) precord);
+    return 0;
+}
+
+static long mySubProcess(subRecord *precord)
+{
+    if (mySubDebug)
+        printf("Record %s called mySubProcess(%p)\n",
+               precord->name, (void*) precord);
+    return 0;
+}
+
+static long myAsubInit(aSubRecord *precord)
+{
+    if (mySubDebug)
+        printf("Record %s called myAsubInit(%p)\n",
+               precord->name, (void*) precord);
+    return 0;
+}
+
+static long myAsubProcess(aSubRecord *precord)
+{
+    if (mySubDebug)
+        printf("Record %s called myAsubProcess(%p)\n",
+               precord->name, (void*) precord);
+    return 0;
+}
+
+/* Register these symbols for use by IOC code: */
+
+epicsExportAddress(int, mySubDebug);
+epicsRegisterFunction(mySubInit);
+epicsRegisterFunction(mySubProcess);
+epicsRegisterFunction(myAsubInit);
+epicsRegisterFunction(myAsubProcess);