> So, if it is desired to pass the CLANG extrawarn compiler-options to
> all W=... then I ask myself why the CLANG block is in the W=1 block
> only?
> So if CLANG extrawarn options are independent of any W=... make-option
> then I prefer to put it in a seperate block with an appropriate
> comment.
>
Maybe something like that (on top of the two patches I had sent).
From: Sedat Dilek <sedat.di...@credativ.de>
Date: Thu, 29 Aug 2019 11:35:21 +0200
Subject: [PATCH 3/3] kbuild: Move extra warnings for Clang
---
Documentation/kbuild/kbuild.rst | 5 +++--
scripts/Makefile.extrawarn | 21 ++++++++++-----------
2 files changed, 13 insertions(+), 13 deletions(-)
diff --git a/Documentation/kbuild/kbuild.rst b/Documentation/kbuild/kbuild.rst
index 3e65d32af875..fa9772ae2367 100644
--- a/Documentation/kbuild/kbuild.rst
+++ b/Documentation/kbuild/kbuild.rst
@@ -245,10 +245,11 @@ KBUILD_EXTRA_CC_CHECKS
------------------------------
If enabled over the make command line with "W=...", it turns on additional
compiler warning options like -Wmissing-declarations for more extensive
-build-time checking. For more details see <scripts/Makefile.extrawarn>.
+build-time checking.
+Some extra warning options are set for all W=... settings when using Clang.
+For more details see <scripts/Makefile.extrawarn>.
W=1 - warnings that may be relevant and does not occur too often
-W=1 - also stops suppressing some warnings
W=2 - warnings that occur quite often but may still be relevant
W=3 - the more obscure warnings, can most likely be ignored
diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn
index 72677ee9f202..86c0f8ae7e35 100644
--- a/scripts/Makefile.extrawarn
+++ b/scripts/Makefile.extrawarn
@@ -5,6 +5,16 @@
KBUILD_CFLAGS += $(call cc-disable-warning, packed-not-aligned)
+#
+# W=... - stops suppressing some warnings when using Clang
+#
+ifdef CONFIG_CC_IS_CLANG
+KBUILD_CFLAGS += -Wno-initializer-overrides
+KBUILD_CFLAGS += -Wno-format
+KBUILD_CFLAGS += -Wno-sign-compare
+KBUILD_CFLAGS += -Wno-format-zero-length
+endif
+
ifeq ("$(origin W)", "command line")
export KBUILD_EXTRA_CC_CHECKS := $(W)
endif
@@ -30,17 +40,6 @@ KBUILD_CFLAGS += -Wno-sign-compare
KBUILD_CPPFLAGS += -DKBUILD_EXTRA_WARN1
-else
-
-# W=1 - also stops suppressing some warnings
-
-ifdef CONFIG_CC_IS_CLANG
-KBUILD_CFLAGS += -Wno-initializer-overrides
-KBUILD_CFLAGS += -Wno-format
-KBUILD_CFLAGS += -Wno-sign-compare
-KBUILD_CFLAGS += -Wno-format-zero-length
-endif
-
endif
#
--
2.20.1
- Sedat -
