From nobody Tue Oct 28 12:16:29 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1515082250355956.679751631511; Thu, 4 Jan 2018 08:10:50 -0800 (PST) Received: from localhost ([::1]:46987 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eX86T-0001eU-Fu for importer@patchew.org; Thu, 04 Jan 2018 11:10:49 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37218) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eX82m-000794-RQ for qemu-devel@nongnu.org; Thu, 04 Jan 2018 11:07:01 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eX82j-0002x7-6a for qemu-devel@nongnu.org; Thu, 04 Jan 2018 11:07:00 -0500 Received: from mx1.redhat.com ([209.132.183.28]:39304) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eX82j-0002vY-14 for qemu-devel@nongnu.org; Thu, 04 Jan 2018 11:06:57 -0500 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 2E6A2C056870 for ; Thu, 4 Jan 2018 16:06:56 +0000 (UTC) Received: from localhost (ovpn-112-61.ams2.redhat.com [10.36.112.61]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4D02C80620; Thu, 4 Jan 2018 16:06:31 +0000 (UTC) From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= To: qemu-devel@nongnu.org Date: Thu, 4 Jan 2018 17:05:08 +0100 Message-Id: <20180104160523.22995-4-marcandre.lureau@redhat.com> In-Reply-To: <20180104160523.22995-1-marcandre.lureau@redhat.com> References: <20180104160523.22995-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Thu, 04 Jan 2018 16:06:56 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v3 03/18] build-sys: add a rule to print a variable X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pbonzini@redhat.com, famz@redhat.com, =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" $ make print-CFLAGS CFLAGS=3D-fsanitize=3Daddress -Og -g Trick from various sources: https://stackoverflow.com/questions/16467718/how-to-print-out-a-variable-in= -makefile https://www.cmcrossroads.com/article/printing-value-makefile-variable Signed-off-by: Marc-Andr=C3=A9 Lureau Reviewed-by: Eric Blake Reviewed-by: Philippe Mathieu-Daud=C3=A9 Tested-by: Philippe Mathieu-Daud=C3=A9 --- Makefile | 5 ++++- docs/devel/build-system.txt | 13 +++++++++++++ 2 files changed, 17 insertions(+), 1 deletion(-) diff --git a/Makefile b/Makefile index 1671db3bdd..f26ef1b1df 100644 --- a/Makefile +++ b/Makefile @@ -8,9 +8,12 @@ SRC_PATH=3D. =20 UNCHECKED_GOALS :=3D %clean TAGS cscope ctags dist \ html info pdf txt \ - help check-help \ + help check-help print-% \ docker docker-% vm-test vm-build-% =20 +print-%: + @echo '$*=3D$($*)' + # All following code might depend on configuration variables ifneq ($(wildcard config-host.mak),) # Put the all: rule here so that config-host.mak can contain dependencies. diff --git a/docs/devel/build-system.txt b/docs/devel/build-system.txt index 386ef36ee3..52501f2ad9 100644 --- a/docs/devel/build-system.txt +++ b/docs/devel/build-system.txt @@ -510,3 +510,16 @@ default-configs/$TARGET-NAME file as input. This is the entrypoint used when make recurses to build a single system or userspace emulator target. It is merely a symlink back to the Makefile.target in the top level. + + +Useful make targets +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D + +- help + + Print a help message for the most common build targets. + +- print-VAR + + Print the value of the variable VAR. Useful for debugging the build + system. --=20 2.15.1.355.g36791d7216