From a96727e01d74fdeb98397b655215b264176ff3ef Mon Sep 17 00:00:00 2001
From: Erik Joelsson <erikj@openjdk.org>
Date: Fri, 9 Jan 2015 16:45:44 +0100
Subject: [PATCH] 8068726: Tab completion of targets fails when current dir is
 the output dir

Reviewed-by: ihse
---
 Makefile | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 1eff79b2194..0814d3867c6 100644
--- a/Makefile
+++ b/Makefile
@@ -54,8 +54,11 @@ ifneq ($(findstring qp,$(MAKEFLAGS)),)
   # Duplication of global targets, needed before ParseConfAndSpec in case we have
   # no configurations.
   help:
-  # If CONF is not set, look for all available configurations
-  CONF?=
+  # If both CONF and SPEC are unset, look for all available configurations by
+  # setting CONF to the empty string.
+  ifeq ($(SPEC), )
+    CONF?=
+  endif
 endif
 
 # ... and then we can include our helper functions