linux-kernel - [PATCH v2 4/4] staging: comedi: Use subdir-ccflags-* to inherit debug flag

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Date:   Tue, 9 Feb 2021 19:08:19 +0800
From:   Yicong Yang <yangyicong@...ilicon.com>
To:     <gregkh@...uxfoundation.org>, <jdelvare@...e.com>,
        <linux@...ck-us.net>, <giometti@...eenne.com>, <abbotti@....co.uk>,
        <hsweeten@...ionengravers.com>, <kw@...ux.com>,
        <helgaas@...nel.org>, <linux-kernel@...r.kernel.org>,
        <linux-pm@...r.kernel.org>, <linux-hwmon@...r.kernel.org>,
        <devel@...verdev.osuosl.org>, <linux-kbuild@...r.kernel.org>,
        <masahiroy@...nel.org>, <michal.lkml@...kovi.net>
CC:     <prime.zeng@...wei.com>, <yangyicong@...ilicon.com>,
        <linuxarm@...neuler.org>
Subject: [PATCH v2 4/4] staging: comedi: Use subdir-ccflags-* to inherit debug flag

From: Junhao He <hejunhao2@...ilicon.com>

As CONFIG_COMEDI_DEBUG intends to have the DEBUG flag
recursively under drivers/staging/comedi, use
subdir-ccflags-* instead of ccflags-* will make it
clearer as the DEBUG flag will be inherited when
traversing subdirectories.

Suggested-by: Bjorn Helgaas <bhelgaas@...gle.com>
Signed-off-by: Junhao He <hejunhao2@...ilicon.com>
Signed-off-by: Yicong Yang <yangyicong@...ilicon.com>
---
 drivers/staging/comedi/Makefile               | 2 +-
 drivers/staging/comedi/drivers/Makefile       | 1 -
 drivers/staging/comedi/drivers/tests/Makefile | 2 --
 drivers/staging/comedi/kcomedilib/Makefile    | 2 --
 4 files changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/staging/comedi/Makefile b/drivers/staging/comedi/Makefile
index 072ed83..f51cc14 100644
--- a/drivers/staging/comedi/Makefile
+++ b/drivers/staging/comedi/Makefile
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
-ccflags-$(CONFIG_COMEDI_DEBUG)		:= -DDEBUG
+subdir-ccflags-$(CONFIG_COMEDI_DEBUG)	:= -DDEBUG
 
 comedi-y				:= comedi_fops.o range.o drivers.o \
 					   comedi_buf.o
diff --git a/drivers/staging/comedi/drivers/Makefile b/drivers/staging/comedi/drivers/Makefile
index b24ac00..7cafc36 100644
--- a/drivers/staging/comedi/drivers/Makefile
+++ b/drivers/staging/comedi/drivers/Makefile
@@ -1,7 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 # Makefile for individual comedi drivers
 #
-ccflags-$(CONFIG_COMEDI_DEBUG)		:= -DDEBUG
 
 # Comedi "helper" modules
 obj-$(CONFIG_COMEDI_8254)		+= comedi_8254.o
diff --git a/drivers/staging/comedi/drivers/tests/Makefile b/drivers/staging/comedi/drivers/tests/Makefile
index b5d8e13..44ac13d 100644
--- a/drivers/staging/comedi/drivers/tests/Makefile
+++ b/drivers/staging/comedi/drivers/tests/Makefile
@@ -1,7 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
 # Makefile for comedi drivers unit tests
 #
-ccflags-$(CONFIG_COMEDI_DEBUG)		:= -DDEBUG
-
 obj-$(CONFIG_COMEDI_TESTS)		+= example_test.o ni_routes_test.o
 CFLAGS_ni_routes_test.o			:= -DDEBUG
diff --git a/drivers/staging/comedi/kcomedilib/Makefile b/drivers/staging/comedi/kcomedilib/Makefile
index 8031142..9f20318 100644
--- a/drivers/staging/comedi/kcomedilib/Makefile
+++ b/drivers/staging/comedi/kcomedilib/Makefile
@@ -1,6 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0
-ccflags-$(CONFIG_COMEDI_DEBUG)		:= -DDEBUG
-
 obj-$(CONFIG_COMEDI_KCOMEDILIB)	+= kcomedilib.o
 
 kcomedilib-objs := kcomedilib_main.o
-- 
2.8.1