From ef045f22ff94f120d1a48f7865e756d6b51c8feb Mon Sep 17 00:00:00 2001
From: nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Sun, 3 Apr 2011 03:40:01 +0000
Subject: [PATCH] build: undefine debug helper templates used by subdir.mk if
 the DEBUG variable is empty, speeds up "make prereq" by 25% when lots of
 packages are installed

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26434 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 include/debug.mk | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/debug.mk b/include/debug.mk
index faead042d..bec74d187 100644
--- a/include/debug.mk
+++ b/include/debug.mk
@@ -21,6 +21,8 @@ ifeq ($(DUMP),)
   endif
 endif
 
+ifneq ($(DEBUG),)
+
 define debug
 $$(findstring $(2),$$(if $$(DEBUG_SCOPE_DIR),$$(if $$(filter $$(DEBUG_SCOPE_DIR)%,$(1)),$(build_debug)),$(build_debug)))
 endef
@@ -38,4 +40,12 @@ $(call warn,$(1),$(2),$(3)	$(4))
 $(4)
 endef
 
+else
+
+debug:=
+warn:=
+debug_eval:=
+warn_eval = $(4)
+
+endif