Don't require pdbbase if not linking iocshRegisterCommon commands.

src/iocsh/iocsh.cpp

@@ -35,6 +35,11 @@
 
 extern "C" {
 
+/*
+ * Global link to pdbbase
+ */
+epicsShareDef struct dbBase **iocshPpdbbase;
+
 /*
  * File-local information
  */
@@ -273,7 +278,11 @@ cvtArg (const char *filename, int lineno, char *arg, iocshArgBuf *argBuf, const
     case iocshArgPdbbase:
         /* Argument must be missing or 0 or pdbbase */
         if(!arg || !*arg || (*arg == '0') || (strcmp(arg, "pdbbase") == 0)) {
-            argBuf->vval = pdbbase;
+            if(!iocshPpdbbase || !*iocshPpdbbase) {
+                showError (filename, lineno, "pdbbase not present");
+                return 0;
+            }
+            argBuf->vval = *iocshPpdbbase;
             break;
         }
         showError (filename, lineno, "Expecting `pdbbase' got `%s'", arg);

src/iocsh/iocsh.h

@@ -70,6 +70,9 @@ epicsShareFunc void epicsShareAPI iocshFree(void);
 
 epicsShareFunc int epicsShareAPI iocsh(const char *pathname);
 
+/* 'weak' link to pdbbase */
+epicsShareExtern struct dbBase **iocshPpdbbase;
+
 #ifdef __cplusplus
 }
 #endif

src/iocsh/iocshRegisterCommon.c

@@ -15,6 +15,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <ctype.h>
+#include <dbAccess.h>
 
 #define epicsExportSharedSymbols
 #include "iocCoreLimitsRegister.h"
@@ -34,6 +35,7 @@
 
 void epicsShareAPI iocshRegisterCommon(void)
 {
+    iocshPpdbbase = &pdbbase;
     iocCoreLimitsRegister();
     osiRegister();
     iocUtilRegister();