From nobody Sun Nov 24 07:21:48 2024 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 70EE6208204; Wed, 6 Nov 2024 19:32:25 +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=1730921545; cv=none; b=i89O+ZddyivQqj54cld/guG/mbkpZv/Jh3biPa9yx+HdCrhBwJmEgwcQmN+lVAfwnPOAwTeISEBy5tUQQgWuIul+hLyg3cSzzfbHtxXjXWj1+w+pNKUTF7y0Pgb1luQ3gt5YlaVwBTUJne384hb69duC2jpkazJCXiED/Ich7ao= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730921545; c=relaxed/simple; bh=IRiCpI1LAj8gdXyqpxxNEdvHCy3pSba0EOUnJCNVx8M=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=kcRRkdm6SbWzpCnDP7u07P1Ha0tCnghkbMh+mMFJ4nJT9ahQLwZexmGKluDO8Y6uOxJ3QP8o+UBqLCt+DrkrFlC1ntV8bfafJtNkBd+/E0jcGSVvOeXx8hFPWmcMWf+v+9uGtA/U5p2L8vn/zE0j0+wgDf1qz/vTUb+uXC+WlgA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=IueV2hAx; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="IueV2hAx" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9C13FC4CEC6; Wed, 6 Nov 2024 19:32:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1730921545; bh=IRiCpI1LAj8gdXyqpxxNEdvHCy3pSba0EOUnJCNVx8M=; h=From:To:Cc:Subject:Date:From; b=IueV2hAxOOeLGHIfDB/awnPMqygPKif/0VdbjeCVzO7UyD91GK/Yn+CWjK0Y9H2wH w99i2ktG2SbfFIgILZiDp6McxmHIS4d0QJeV/zNfr+AGcJhAlrFdNYbvCh1URk23lf nY9UCQcnpa0xVUK9HNxgl4/fOyu92L3m6cIsLf2DVVmt2bY/3yXMr7V7FELJqPP1ym eEsmQUIQOQW4uuY1HBSieTnr64F3MAZIJ+/lGxdZdSnxoYXd6QGC9LnZuXDtmqEKJN Tn7UR1D4Eg63nUO4MJqO1a4dIsmGP0CopeTL8WZ+qyb6MwE0j+Nhdtnu31C11oBRZO BTxU3j+H3Ig+Q== From: =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= To: bpf@vger.kernel.org, linux-perf-users@vger.kernel.org, Alexandre Ghiti , Arnaldo Carvalho de Melo , Jean-Philippe Brucker , Quentin Monnet Cc: =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= , Paul Walmsley , Palmer Dabbelt , Albert Ou , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, David Abdurachmanov Subject: [PATCH] tools: Override makefile ARCH variable if defined, but empty Date: Wed, 6 Nov 2024 20:32:06 +0100 Message-ID: <20241106193208.290067-1-bjorn@kernel.org> X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable From: Bj=C3=B6rn T=C3=B6pel There are a number of tools (bpftool, selftests), that require a "bootstrap" build. Here, a bootstrap build is a build host variant of a target. E.g., assume that you're performing a bpftool cross-build on x86 to riscv, a bootstrap build would then be an x86 variant of bpftool. The typical way to perform the host build variant, is to pass "ARCH=3D" in a sub-make. However, if a variable has been set with a command argument, then ordinary assignments in the makefile are ignored. This side-effect results in that ARCH, and variables depending on ARCH are not set. Workaround by overriding ARCH to the host arch, if ARCH is empty. Fixes: 8859b0da5aac ("tools/bpftool: Fix cross-build") Signed-off-by: Bj=C3=B6rn T=C3=B6pel Acked-by: Quentin Monnet Reviewed-by: Jean-Philippe Brucker Reviewed-by: Namhyung Kim Tested-by: Alexandre Ghiti --- tools/scripts/Makefile.arch | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/scripts/Makefile.arch b/tools/scripts/Makefile.arch index f6a50f06dfc4..eabfe9f411d9 100644 --- a/tools/scripts/Makefile.arch +++ b/tools/scripts/Makefile.arch @@ -7,8 +7,8 @@ HOSTARCH :=3D $(shell uname -m | sed -e s/i.86/x86/ -e s/x8= 6_64/x86/ \ -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/= \ -e s/riscv.*/riscv/ -e s/loongarch.*/loo= ngarch/) =20 -ifndef ARCH -ARCH :=3D $(HOSTARCH) +ifeq ($(strip $(ARCH)),) +override ARCH :=3D $(HOSTARCH) endif =20 SRCARCH :=3D $(ARCH) base-commit: 7758b206117dab9894f0bcb8333f8e4731c5065a --=20 2.45.2