From f1079cbe9fa91e0c11fad756b985388ced6dc032 Mon Sep 17 00:00:00 2001
From: Francisco Molina <francois-xavier.molina@inria.fr>
Date: Wed, 20 May 2020 16:25:06 +0200
Subject: [PATCH 1/2] Makefile.include: don't warn about BOARDSDIR usage in
 sub-make

---
 Makefile.include | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Makefile.include b/Makefile.include
index d555684427..c744b5d358 100644
--- a/Makefile.include
+++ b/Makefile.include
@@ -99,8 +99,11 @@ endif
 ifneq (,$(BOARDSDIR))
   # Only warn users, not the CI.
   ifneq ($(RIOT_CI_BUILD),1)
-    $(warning Using BOARDSDIR is deprecated use EXTERNAL_BOARD_DIRS instead)
-    $(info EXTERNAL_BOARD_DIRS can contain multiple folders separated by space)
+    # Do not warn when set from sub-make
+    ifeq ($(MAKELEVEL),0)
+      $(warning Using BOARDSDIR is deprecated use EXTERNAL_BOARD_DIRS instead)
+      $(info EXTERNAL_BOARD_DIRS can contain multiple folders separated by space)
+    endif
   endif
   EXTERNAL_BOARD_DIRS += $(BOARDSDIR)
 endif

From 1bd74ee81f59c2ed170dc77bb1c04987540fbb00 Mon Sep 17 00:00:00 2001
From: Francisco Molina <francois-xavier.molina@inria.fr>
Date: Wed, 20 May 2020 16:26:31 +0200
Subject: [PATCH 2/2] Makefile.include: remove useless assignment of none to
 BOARD

---
 Makefile.include | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/Makefile.include b/Makefile.include
index c744b5d358..8dd0ae1584 100644
--- a/Makefile.include
+++ b/Makefile.include
@@ -186,10 +186,6 @@ GLOBAL_GOALS += buildtest \
                 #
 
 ifneq (, $(filter $(GLOBAL_GOALS), $(MAKECMDGOALS)))
-  BOARD=none
-endif
-
-ifeq (none,$(BOARD))
   include $(RIOTMAKE)/info-global.inc.mk
   include $(RIOTMAKE)/buildtests.inc.mk
 else
@@ -950,7 +946,7 @@ ifneq ($(_BASELIBS_VALUE_BEFORE_USAGE),$(BASELIBS))
   $(error BASELIBS value changed)
 endif
 
-endif # BOARD=none
+endif
 
 # include RIOT_MAKEFILES_GLOBAL_POST configuration files
 # allows setting user specific system wide configuration parsed after the body