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From: Ahmad Fatoum <ahmad@a3f.at>
To: barebox@lists.infradead.org
Subject: [PATCH] kbuild, LLVMLinux: Add -Werror to cc-option to support clang
Date: Fri, 27 Sep 2019 08:05:36 +0200	[thread overview]
Message-ID: <20190927060536.25664-1-ahmad@a3f.at> (raw)

From: Mark Charlebois <charlebm@gmail.com>

Clang will warn about unknown warnings but will not return false
unless -Werror is set. GCC will return false if an unknown
warning is passed.

Adding -Werror make both compiler behave the same.

[arnd: it turns out we need the same patch for testing whether -ffunction-sections
       works right with gcc. I've build tested extensively with this patch
       applied, so let's just merge this one now.]

Signed-off-by: Mark Charlebois <charlebm@gmail.com>
Signed-off-by: Behan Webster <behanw@converseincode.com>
Reviewed-by: Jan-Simon Möller <dl9pf@gmx.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
[afa: ported to barebox from upstream c3f0d0bc5b01ad9]
Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
---
 scripts/Kbuild.include | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index a2dbbd8a0084..5f03cf4ffb94 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -109,17 +109,17 @@ as-instr = $(call try-run,\
 # Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)
 
 cc-option = $(call try-run,\
-	$(CC) $(KBUILD_CPPFLAGS) $(CFLAGS) $(1) -c -xc /dev/null -o "$$TMP",$(1),$(2))
+	$(CC) -Werror $(KBUILD_CPPFLAGS) $(CFLAGS) $(1) -c -xc /dev/null -o "$$TMP",$(1),$(2))
 
 # cc-option-yn
 # Usage: flag := $(call cc-option-yn,-march=winchip-c6)
 cc-option-yn = $(call try-run,\
-	$(CC) $(KBUILD_CPPFLAGS) $(CFLAGS) $(1) -c -xc /dev/null -o "$$TMP",y,n)
+	$(CC) -Werror $(KBUILD_CPPFLAGS) $(CFLAGS) $(1) -c -xc /dev/null -o "$$TMP",y,n)
 
 # cc-disable-warning
 # Usage: cflags-y += $(call cc-disable-warning,unused-but-set-variable)
 cc-disable-warning = $(call try-run,\
-	$(CC) $(KBUILD_CPPFLAGS) $(CFLAGS) -W$(strip $(1)) -c -xc /dev/null -o "$$TMP",-Wno-$(strip $(1)))
+	$(CC) -Werror $(KBUILD_CPPFLAGS) $(CFLAGS) -W$(strip $(1)) -c -xc /dev/null -o "$$TMP",-Wno-$(strip $(1)))
 
 # cc-version
 # Usage gcc-ver := $(call cc-version)
-- 
2.20.1


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             reply	other threads:[~2019-09-27  6:06 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-27  6:05 Ahmad Fatoum [this message]
2019-09-30 18:35 ` Sascha Hauer

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