From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 521F5197A8F; Thu, 6 Jun 2024 14:14:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717683280; cv=none; b=PPqOGUXyZmzDbhakwb2ZN4YTy7xo1nLP0mUQbpIS23DUQeWfT8NgGqlVk3pRzbe7igsqOF9twvfdHu9W4aWZp6J6/ggkV+322+hnVCydrwtDa21Q5GmDiatSpQyUebPixByWJ8SvZ1ty6JygwoApPytpKwEX/3juGNp5rkMlfnw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717683280; c=relaxed/simple; bh=6xwQcj3nwCcFNSIIc6UAQE2vyS7x1LmjUqQa4savqUM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LnTsRG3Ky/v7qTTqpmR5ZZbGkV3Faz2wDyJdf1QliKiuzHbWPVfAoImDtk11qEsRuSDuW2DMLXnFT/el86tBfnHGdicXnNDcaQYtmWq2DRphGgHvWXCHxvOwJpRgCfUBH6CdM+3RyOTHO6IQ640ep/J1LPZ+KJYoXnmtCwE8l2M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Nj3Hzd7W; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Nj3Hzd7W" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 30DABC2BD10; Thu, 6 Jun 2024 14:14:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1717683280; bh=6xwQcj3nwCcFNSIIc6UAQE2vyS7x1LmjUqQa4savqUM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Nj3Hzd7WtxDIdrBgXaoyD0VhIIFeJfYCjWolPps6JggMCtiqFbtW8vBhX93qS7pvw gnSEheV5m01yNymL1P30X19kukJIBZsk3oWfotSJhtm0V3iHIukcHREaaPhWWsEu42 KgrxmqBJ9uGiL2+dEvg3ML41uavycefH6DU/OXeY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Mark Brown , Valentin Obst , John Hubbard , Shuah Khan , Sasha Levin Subject: [PATCH 6.6 222/744] selftests: default to host arch for LLVM builds Date: Thu, 6 Jun 2024 15:58:14 +0200 Message-ID: <20240606131739.514794674@linuxfoundation.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240606131732.440653204@linuxfoundation.org> References: <20240606131732.440653204@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Valentin Obst [ Upstream commit d4e6fbd245c48b272cc591d1c5e7c07aedd7f071 ] Align the behavior for gcc and clang builds by interpreting unset `ARCH` and `CROSS_COMPILE` variables in `LLVM` builds as a sign that the user wants to build for the host architecture. This patch preserves the properties that setting the `ARCH` variable to an unknown value will trigger an error that complains about insufficient information, and that a set `CROSS_COMPILE` variable will override the target triple that is determined based on presence/absence of `ARCH`. When compiling with clang, i.e., `LLVM` is set, an unset `ARCH` variable in combination with an unset `CROSS_COMPILE` variable, i.e., compiling for the host architecture, leads to compilation failures since `lib.mk` can not determine the clang target triple. In this case, the following error message is displayed for each subsystem that does not set `ARCH` in its own Makefile before including `lib.mk` (lines wrapped at 75 chrs): make[1]: Entering directory '/mnt/build/linux/tools/testing/selftests/ sysctl' ../lib.mk:33: *** Specify CROSS_COMPILE or add '--target=' option to lib.mk. Stop. make[1]: Leaving directory '/mnt/build/linux/tools/testing/selftests/ sysctl' In the same scenario a gcc build would default to the host architecture, i.e., it would use plain `gcc`. Fixes: 795285ef2425 ("selftests: Fix clang cross compilation") Reviewed-by: Mark Brown Signed-off-by: Valentin Obst Reviewed-by: John Hubbard Signed-off-by: Shuah Khan Signed-off-by: Sasha Levin --- tools/testing/selftests/lib.mk | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk index aa646e0661f36..a8f0442a36bca 100644 --- a/tools/testing/selftests/lib.mk +++ b/tools/testing/selftests/lib.mk @@ -7,6 +7,8 @@ else ifneq ($(filter -%,$(LLVM)),) LLVM_SUFFIX := $(LLVM) endif +CLANG := $(LLVM_PREFIX)clang$(LLVM_SUFFIX) + CLANG_TARGET_FLAGS_arm := arm-linux-gnueabi CLANG_TARGET_FLAGS_arm64 := aarch64-linux-gnu CLANG_TARGET_FLAGS_hexagon := hexagon-linux-musl @@ -18,7 +20,13 @@ CLANG_TARGET_FLAGS_riscv := riscv64-linux-gnu CLANG_TARGET_FLAGS_s390 := s390x-linux-gnu CLANG_TARGET_FLAGS_x86 := x86_64-linux-gnu CLANG_TARGET_FLAGS_x86_64 := x86_64-linux-gnu -CLANG_TARGET_FLAGS := $(CLANG_TARGET_FLAGS_$(ARCH)) + +# Default to host architecture if ARCH is not explicitly given. +ifeq ($(ARCH),) +CLANG_TARGET_FLAGS := $(shell $(CLANG) -print-target-triple) +else +CLANG_TARGET_FLAGS := $(CLANG_TARGET_FLAGS_$(ARCH)) +endif ifeq ($(CROSS_COMPILE),) ifeq ($(CLANG_TARGET_FLAGS),) @@ -30,7 +38,7 @@ else CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) endif # CROSS_COMPILE -CC := $(LLVM_PREFIX)clang$(LLVM_SUFFIX) $(CLANG_FLAGS) -fintegrated-as +CC := $(CLANG) $(CLANG_FLAGS) -fintegrated-as else CC := $(CROSS_COMPILE)gcc endif # LLVM -- 2.43.0