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From: Masahiro Yamada <masahiroy@kernel.org>
To: linux-kbuild@vger.kernel.org
Cc: Ingo Molnar <mingo@redhat.com>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Michal Marek <michal.lkml@markovi.net>,
	Nathan Chancellor <natechancellor@gmail.com>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Stephen Boyd <swboyd@chromium.org>,
	Vincenzo Frascino <vincenzo.frascino@arm.com>,
	Will Deacon <will@kernel.org>,
	clang-built-linux@googlegroups.com,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 4/4] kbuild: remove cc-option test of -Werror=date-time
Date: Thu, 10 Sep 2020 22:51:20 +0900	[thread overview]
Message-ID: <20200910135120.3527468-4-masahiroy@kernel.org> (raw)
In-Reply-To: <20200910135120.3527468-1-masahiroy@kernel.org>

The minimal compiler versions, GCC 4.9 and Clang 10 support this flag.

Here is the godbolt:
https://godbolt.org/z/xvjcMa

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---

 Makefile                          | 2 +-
 arch/arm64/kernel/vdso32/Makefile | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 5102c89d3167..1d7c58684fda 100644
--- a/Makefile
+++ b/Makefile
@@ -940,7 +940,7 @@ KBUILD_CFLAGS  += -fno-stack-check
 KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
 
 # Prohibit date/time macros, which would make the build non-deterministic
-KBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
+KBUILD_CFLAGS   += -Werror=date-time
 
 # enforce correct pointer usage
 KBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile
index dfffd55175a3..1feb4f8e556e 100644
--- a/arch/arm64/kernel/vdso32/Makefile
+++ b/arch/arm64/kernel/vdso32/Makefile
@@ -92,7 +92,7 @@ VDSO_CFLAGS += $(call cc32-option,-Wdeclaration-after-statement,)
 VDSO_CFLAGS += $(call cc32-option,-Wno-pointer-sign)
 VDSO_CFLAGS += -fno-strict-overflow
 VDSO_CFLAGS += $(call cc32-option,-Werror=strict-prototypes)
-VDSO_CFLAGS += $(call cc32-option,-Werror=date-time)
+VDSO_CFLAGS += -Werror=date-time
 VDSO_CFLAGS += $(call cc32-option,-Werror=incompatible-pointer-types)
 
 # The 32-bit compiler does not provide 128-bit integers, which are used in
-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: Masahiro Yamada <masahiroy@kernel.org>
To: linux-kbuild@vger.kernel.org
Cc: Michal Marek <michal.lkml@markovi.net>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	linux-kernel@vger.kernel.org, Stephen Boyd <swboyd@chromium.org>,
	clang-built-linux@googlegroups.com,
	Ingo Molnar <mingo@redhat.com>,
	Nathan Chancellor <natechancellor@gmail.com>,
	Vincenzo Frascino <vincenzo.frascino@arm.com>,
	Will Deacon <will@kernel.org>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH 4/4] kbuild: remove cc-option test of -Werror=date-time
Date: Thu, 10 Sep 2020 22:51:20 +0900	[thread overview]
Message-ID: <20200910135120.3527468-4-masahiroy@kernel.org> (raw)
In-Reply-To: <20200910135120.3527468-1-masahiroy@kernel.org>

The minimal compiler versions, GCC 4.9 and Clang 10 support this flag.

Here is the godbolt:
https://godbolt.org/z/xvjcMa

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---

 Makefile                          | 2 +-
 arch/arm64/kernel/vdso32/Makefile | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 5102c89d3167..1d7c58684fda 100644
--- a/Makefile
+++ b/Makefile
@@ -940,7 +940,7 @@ KBUILD_CFLAGS  += -fno-stack-check
 KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
 
 # Prohibit date/time macros, which would make the build non-deterministic
-KBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
+KBUILD_CFLAGS   += -Werror=date-time
 
 # enforce correct pointer usage
 KBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile
index dfffd55175a3..1feb4f8e556e 100644
--- a/arch/arm64/kernel/vdso32/Makefile
+++ b/arch/arm64/kernel/vdso32/Makefile
@@ -92,7 +92,7 @@ VDSO_CFLAGS += $(call cc32-option,-Wdeclaration-after-statement,)
 VDSO_CFLAGS += $(call cc32-option,-Wno-pointer-sign)
 VDSO_CFLAGS += -fno-strict-overflow
 VDSO_CFLAGS += $(call cc32-option,-Werror=strict-prototypes)
-VDSO_CFLAGS += $(call cc32-option,-Werror=date-time)
+VDSO_CFLAGS += -Werror=date-time
 VDSO_CFLAGS += $(call cc32-option,-Werror=incompatible-pointer-types)
 
 # The 32-bit compiler does not provide 128-bit integers, which are used in
-- 
2.25.1


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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2020-09-10 21:28 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-10 13:51 [PATCH 1/4] kbuild: remove cc-option test of -fno-strict-overflow Masahiro Yamada
2020-09-10 13:51 ` Masahiro Yamada
2020-09-10 13:51 ` [PATCH 2/4] kbuild: remove cc-option test of -fno-merge-all-constants Masahiro Yamada
2020-09-10 16:33   ` Nathan Chancellor
2020-09-10 16:41     ` Masahiro Yamada
2020-09-10 13:51 ` [PATCH 3/4] kbuild: remove cc-option test of -fno-stack-check Masahiro Yamada
2020-09-10 16:37   ` Nathan Chancellor
2020-09-10 13:51 ` Masahiro Yamada [this message]
2020-09-10 13:51   ` [PATCH 4/4] kbuild: remove cc-option test of -Werror=date-time Masahiro Yamada
2020-09-10 16:43   ` Nathan Chancellor
2020-09-10 16:43     ` Nathan Chancellor
2020-09-10 16:26 ` [PATCH 1/4] kbuild: remove cc-option test of -fno-strict-overflow Nathan Chancellor
2020-09-10 16:26   ` Nathan Chancellor
2020-09-11 15:22 ` Will Deacon
2020-09-11 15:22   ` Will Deacon
2020-09-14 12:51   ` Masahiro Yamada
2020-09-14 12:51     ` Masahiro Yamada
2020-09-14 13:20     ` Will Deacon
2020-09-14 13:20       ` Will Deacon

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