From patchwork Tue Apr 16 14:57:55 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shuah X-Patchwork-Id: 10903255 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7DE9614DB for ; Tue, 16 Apr 2019 14:57:59 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5BCC828956 for ; Tue, 16 Apr 2019 14:57:59 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4DA8628961; Tue, 16 Apr 2019 14:57:59 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B273128956 for ; Tue, 16 Apr 2019 14:57:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725796AbfDPO56 (ORCPT ); Tue, 16 Apr 2019 10:57:58 -0400 Received: from mail.kernel.org ([198.145.29.99]:48446 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726753AbfDPO56 (ORCPT ); Tue, 16 Apr 2019 10:57:58 -0400 Received: from shuah-t480s.internal (c-24-9-64-241.hsd1.co.comcast.net [24.9.64.241]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6B7E420684; Tue, 16 Apr 2019 14:57:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1555426676; bh=/mQsofZ4LWY/q7XXNPCihddq7ysn99QENvzSNrtSb+k=; h=From:To:Cc:Subject:Date:From; b=wThvFXDzv8r51LyfTy7O3R775N4i+EIDteEi/3Oe2WVPXwYFteKv/TprK7niWYucw E6FANlu4nZWeid//6XFkLAeR2cyvS687e3QmxPrq2X+wHTBBtYyFr+CGxjDYm7nspb YtJ/OheP3KvEg4092C60ik4JG2xBT4I/NOtpPNfY= From: Shuah Khan To: shuah@kernel.org Cc: linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] selftests: fix headers_install circular dependency Date: Tue, 16 Apr 2019 08:57:55 -0600 Message-Id: <20190416145755.7972-1-shuah@kernel.org> X-Mailer: git-send-email 2.19.1 MIME-Version: 1.0 Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP "make kselftest" fails with "Circular Makefile.o <- prepare dependency dropped." error, when lib.mk invokes "make headers_install". Make level 0: Main make calls selftests run_tests target ... Make level n: selftests lib.mk invokes main make's headers_install The secondary level make inherits builtin-rules which will use the rule to generate Makefile.o and runs into "Circular Makefile.o <- prepare dependency dropped." error, and kselftest compile fails. Invoke headers_install target with --no-builtin-rules to avoid circular error. In addition, lib.mk installs headers in the default HDR_PATH, even when build relocation is requested with O= or export KBUILD_OUTPUT. Fix the problem by passing in INSTALL_HDR_PATH. The headers are installed under the specified output "dir/usr". Signed-off-by: Shuah Khan --- tools/testing/selftests/Makefile | 52 +++++++++++++++++++++++++++----- tools/testing/selftests/lib.mk | 34 +++++++++++++++++++-- 2 files changed, 76 insertions(+), 10 deletions(-) diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index 971fc8428117..743cd374d07d 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -75,12 +75,15 @@ ifneq ($(KBUILD_SRC),) override LDFLAGS = endif -BUILD := $(O) -ifndef BUILD - BUILD := $(KBUILD_OUTPUT) -endif -ifndef BUILD - BUILD := $(shell pwd) +ifneq ($(O),) + BUILD := $(O) +else + ifneq ($(KBUILD_OUTPUT),) + BUILD := $(KBUILD_OUTPUT) + else + BUILD := $(shell pwd) + DEFAULT_INSTALL_HDR_PATH := 1 + endif endif # KSFT_TAP_LEVEL is used from KSFT framework to prevent nested TAP header @@ -89,8 +92,41 @@ endif # with system() call. Export it here to cover override RUN_TESTS defines. export KSFT_TAP_LEVEL=`echo 1` +# Prepare for headers install +top_srcdir ?= ../../.. +include $(top_srcdir)/scripts/subarch.include +ARCH ?= $(SUBARCH) +export KSFT_KHDR_INSTALL_DONE := 1 export BUILD -all: + +# set default goal to all, so make without a target runs all, even when +# all isn't the first target in the file. +.DEFAULT_GOAL := all + +# Install headers here once for all tests. KSFT_KHDR_INSTALL_DONE +# is used to avoid running headers_install from lib.mk. +# Invoke headers install with --no-builtin-rules to avoid circular +# dependency in "make kselftest" case. In this case, second level +# make inherits builtin-rules which will use the rule generate +# Makefile.o and runs into +# "Circular Makefile.o <- prepare dependency dropped." +# and headers_install fails and test compile fails. +# +# O= KBUILD_OUTPUT cases don't run into this error, since main Makefile +# invokes them as sub-makes and --no-builtin-rules is not necessary, +# but doesn't cause any failures. Keep it simple and use the same +# flags in both cases. +# Local build cases: "make kselftest", "make -C" - headers are installed +# in the default INSTALL_HDR_PATH usr/include. +khdr: +ifeq (1,$(DEFAULT_INSTALL_HDR_PATH)) + make --no-builtin-rules ARCH=$(ARCH) -C $(top_srcdir) headers_install +else + make --no-builtin-rules INSTALL_HDR_PATH=$$BUILD/usr \ + ARCH=$(ARCH) -C $(top_srcdir) headers_install +endif + +all: khdr @for TARGET in $(TARGETS); do \ BUILD_TARGET=$$BUILD/$$TARGET; \ mkdir $$BUILD_TARGET -p; \ @@ -173,4 +209,4 @@ clean: make OUTPUT=$$BUILD_TARGET -C $$TARGET clean;\ done; -.PHONY: all run_tests hotplug run_hotplug clean_hotplug run_pstore_crash install clean +.PHONY: khdr all run_tests hotplug run_hotplug clean_hotplug run_pstore_crash install clean diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk index 8b0f16409ed7..f888522a34e9 100644 --- a/tools/testing/selftests/lib.mk +++ b/tools/testing/selftests/lib.mk @@ -3,7 +3,16 @@ CC := $(CROSS_COMPILE)gcc ifeq (0,$(MAKELEVEL)) -OUTPUT := $(shell pwd) + ifneq ($(O),) + OUTPUT := $(O) + else + ifneq ($(KBUILD_OUTPUT),) + OUTPUT := $(KBUILD_OUTPUT) + else + OUTPUT := $(shell pwd) + DEFAULT_INSTALL_HDR_PATH := 1 + endif + endif endif # The following are built by lib.mk common compile rules. @@ -21,9 +30,30 @@ top_srcdir ?= ../../../.. include $(top_srcdir)/scripts/subarch.include ARCH ?= $(SUBARCH) +# Invoke headers install with --no-builtin-rules to avoid circular +# dependency in "make kselftest" case. In this case, second level +# make inherits builtin-rules which will use the rule generate +# Makefile.o and runs into +# "Circular Makefile.o <- prepare dependency dropped." +# and headers_install fails and test compile fails. +# O= KBUILD_OUTPUT cases don't run into this error, since main Makefile +# invokes them as sub-makes and --no-builtin-rules is not necessary, +# but doesn't cause any failures. Keep it simple and use the same +# flags in both cases. +# Note that the support to install headers from lib.mk is necessary +# when test Makefile is run directly with "make -C". +# When local build is done, headers are installed in the default +# INSTALL_HDR_PATH usr/include. .PHONY: khdr khdr: - make ARCH=$(ARCH) -C $(top_srcdir) headers_install +ifndef KSFT_KHDR_INSTALL_DONE +ifeq (1,$(DEFAULT_INSTALL_HDR_PATH)) + make --no-builtin-rules ARCH=$(ARCH) -C $(top_srcdir) headers_install +else + make --no-builtin-rules INSTALL_HDR_PATH=$$OUTPUT/usr \ + ARCH=$(ARCH) -C $(top_srcdir) headers_install +endif +endif all: khdr $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) else