From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42411) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ePraD-0004JQ-BO for qemu-devel@nongnu.org; Fri, 15 Dec 2017 10:07:30 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ePra7-00017j-AA for qemu-devel@nongnu.org; Fri, 15 Dec 2017 10:07:29 -0500 Received: from mx1.redhat.com ([209.132.183.28]:59430) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ePra7-00016r-3F for qemu-devel@nongnu.org; Fri, 15 Dec 2017 10:07:23 -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 51A172D5A0E for ; Fri, 15 Dec 2017 15:07:22 +0000 (UTC) From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Date: Fri, 15 Dec 2017 16:06:49 +0100 Message-Id: <20171215150659.1811-4-marcandre.lureau@redhat.com> In-Reply-To: <20171215150659.1811-1-marcandre.lureau@redhat.com> References: <20171215150659.1811-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PATCH v2 03/13] build-sys: add a rule to print a variable List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , "Daniel P. Berrange" $ 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 --- Makefile | 5 ++++- docs/devel/build-system.txt | 13 +++++++++++++ 2 files changed, 17 insertions(+), 1 deletion(-) diff --git a/Makefile b/Makefile index 199f39fde1..46bc61004d 100644 --- a/Makefile +++ b/Makefile @@ -6,7 +6,10 @@ BUILD_DIR=3D$(CURDIR) # Before including a proper config-host.mak, assume we are in the source= tree SRC_PATH=3D. =20 -UNCHECKED_GOALS :=3D %clean TAGS cscope ctags docker docker-% help +UNCHECKED_GOALS :=3D %clean TAGS cscope ctags docker docker-% help print= -% + +print-%: + @echo '$*=3D$($*)' =20 # All following code might depend on configuration variables ifneq ($(wildcard config-host.mak),) diff --git a/docs/devel/build-system.txt b/docs/devel/build-system.txt index 386ef36ee3..52501f2ad9 100644 --- a/docs/devel/build-system.txt +++ b/docs/devel/build-system.txt @@ -510,3 +510,16 @@ default-configs/$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