Make sure apps/examples/pashello still builds; update comments; refresh configurations

binfmt/Kconfig

@@ -52,6 +52,7 @@ endif
 config BUILTIN
 	bool "Support Builtin Applications"
 	default n
+	depends on !NUTTX_KERNEL || EXPERIMENTAL
 	---help---
 		Enable support for builtin applications.  This features assigns a string
 		name to an application and in addition if FS_BINFS is defined, retaining
@@ -59,6 +60,11 @@ config BUILTIN
 		is also the underlying requirement to support built-in applications in the
 		NuttShell (NSH).
 
+		ISSUES:  This feature is highly coupled with logic in the apps/subdirectory
+		and, as a consequence, cannot be used in environments that do not
+		include the standard NuttX apps/ nor in build configurations using
+		NUTTX_KERNEL.
+
 if BUILTIN
 source binfmt/libbuiltin/Kconfig
 endif
@@ -78,6 +84,11 @@ config PCODE
 		in the misc/pascal directory for more details.  The correct
 		installation director is: apps/interpreters.
 
+		ISSUES:  This feature is highly coupled with logic in the apps/subdirectory
+		and, as a consequence, cannot be used in environments that do not
+		include the standard NuttX apps/ nor in build configurations using
+		NUTTX_KERNEL.
+
 if PCODE
 source binfmt/libpcode/Kconfig
 endif

binfmt/pcode.c

@@ -236,7 +236,8 @@ static void pcode_onexit(int exitcode, FAR void *arg)
  * Description:
  *   This is the proxy program that runs and starts the P-Code interpreter.
  *
- * REVISIT:  There are issues here when CONFIG_NUTTX_KERNEL is selected.
+ * REVISIT:  There are issues here when CONFIG_NUTTX_KERNEL is selected.  Also
+ * This implementation is too highly couple to logic in the apps/ directory.
  *
  ****************************************************************************/